Class
81
(last class)
Thursday,
6/2/16 Warm-Up: 1. What is the current phase of the moon? 2. What's a blue moon? 3. Suppose you hold a sphere at arm's length and use it to cover up the moon. How large does the object need to be to perfectly cover up the moon? Quarter sized? Dime sized? Something else? What if you are trying to cover the sun.
Today's Agenda:
Homework:
|
Class
80
(2nd to last class day)
Tuesday,
5/31/16 Warm-Up:
1. According to the diagram,
on what date are we closest to the sun? 3. How many time zones are there? 4. What time is it at the North Pole?
Today's Agenda:
Homework:
|
Class
79
(2 more classes after today)
Thursday,
5/26/16 Warm-Up: The Sun, Earth, and Moon are continually spaghettifying one another. We see the effects of this spaghettification in the form of tides. 1. What causes spaghettification? 2. How much gravitational force do the Sun and Moon each exert on 1,000,000 pounds of water? 3. Do we see different sides of the moon, or do we always see the same side? 4. Is the Earth's 24 hour rotational period speeding up or slowing down over time? Explain. Answer Good source of information about tides
Today's Agenda:
Homework:
|
Class 78
Tuesday,
5/24/16 Warm-Up: The pictures on the rights show a person shooting a laser upward at a mirror. The laser beam then bounces the downward to a detector. The top picture shows what the guy with the laser observes. The other pictures show what the observer in another spacecraft observes. 1) Who sees the light travel farther? 2) Assuming that they can both measure the light's speed, who thinks the light is traveling faster? 3) Who is correct? 4) What's the point?
Today's Agenda:
Homework:
|
Class 77
Friday,
5/20/16 Warm-Up: The picture on the right shows an explosion. This explosion shares some similarities with the Big Bang theory of the Universe's formation.
1. In the picture, which bits of matter are traveling fastest? How can you tell?
2. One product of this explosion is the movement of bits of matter. Identify another product of the explosion.
3. Look at the picture of the explosion and try to determine the location where the explosion originated.
4. In some ways, the expansion of the Universe after the Big Bang was like the expansion after the explosion above. In other ways, it was more like the inflation of the surface of a balloon. The fiery explosion above had a center -- a point of origin -- but the Univsere did not. Can you identify one particular coin that represents the center of the expanding balloon surface?
Today's Agenda:
Other stuff:
Homework:
|
Class 76
Wednesday,
5/18/16 Warm-Up: If you're standing next to a race track, what do you hear as the cars pass you? a. Their pitch changes from high to low. b. Their pitch changes from low to high. c. There is no change in pitch. Today's Agenda:
Other stuff: Homework:
|
Class 75
Friday,
5/13/16 Warm-Up: This solar oven has several features that helps it create a high temperature environment using solar energy. One of those features exploits the Greenhouse Effect. 1. What part of the solar oven targets the Greenhouse Effect? 2. How does the Greenhouse Effect work? 3. What can be done to limit the effects of the Greenhouse Effect? Today's Agenda:
Homework:
|
Class 75
Wednesday,
5/11/16 Warm-Up: Today's Agenda:
Homework:
|
Class 74
Monday,
5/9/16 Warm-Up: 1. Identify the crank shafts, piston rods, pistons, and cylinders in the pictures on the right. 2. What is meant when someone says an engine has lost compression? Today's Agenda:
Homework:
|
Class
73
Thursday,
5/5/16 Warm-Up: For purposes of illustration, the proportions in the diagram on the right have been intentionally exaggerated. 1. Regarding the masses that are involved, what's wrong with the equation? 2. E = mc2 is a famous equation. What do each of the letters in the equation represent?
Today's Agenda:
Homework:
|
Class
72
Tuesday,
5/3/16 Warm-Up: Where are we in the Universe? If you were going to write a letter to someone in the most distant reaches of the universe, how would you write your return address?
Today's Agenda:
Homework: Varies. Read the information above and decide what you should do before next class. |
Class
71
Wednesday,
4/29/16 Warm-Up: How does a Stirling engine really work? Does the balloon move because of convection currents or because of changes in pressure? Today's Agenda:
Homework:
|
Class
70
Wednesday,
4/27/16 Warm-Up: How can we solve these common problems? 1. Wire is difficult to straighten. 2. It's hard to bend wire into a nice crankshaft. 3. The task of attaching wires loosely but securely to a crankshaft is challenging. Today's Agenda:
Homework:
|
Class
69
Monday,
4/25/16 Warm-Up: What's the main difference between an alpha Stirling engine and a beta Stirling engine? Today's Agenda:
Homework:
|
Class
68
Thursday,
4/14/16 Warm-Up: 1. If an activity is sustainable, what does that mean? 2. Directly or indirectly, that activity is made possible by some type of energy. Where does (did) that energy come from? 3. How will this activity be supported in the future -- or is it unsustainable? Today's Agenda:
Homework: No Homework |
Class
67
Tuesday,
4/12/16 Warm-Up: 1. How do each of the glues on the right"cure." Is it a physical or chemical change? 2. For each type of glue, how can you speed up the cure time? 3. What are the advantages and disadvantages of each type of glue? 4. Should you ever remove a glue stick from a hot glue gun after you have started melting the stick? 5. Does a hot glue gun need to cool before you wrap its cord around it to put the glue gun away? 6. If you get some hot glue on your skin, should you wipe it off immediately, or should you let it harden? Today's Agenda:
Homework:
|
Class
66
Friday,
4/8/16 Warm-Up: 1. Can you tie the basic fishing knot on the right? If you have never tied it, get some string and try it. 2. How can you tie a fixed loop on the end of a string? Today's Agenda:
Homework:
|
Class
65
Wednesday,
4/6/16 Warm-Up: 1. What is a renewable resource? 2. How much of our current energy use comes from renewable resources? 3. At our current rate of consumption, how long will the World's oil last? one answer 4. Where we get our power when all of the oil is gone? other resources Today's Agenda:
Homework:
|
Class
64
Monday,
4/4/16 Warm-Up: What are isotopes? Today's Agenda:
Homework:
|
Class
63
Wednesday,
3/31 Warm-Up: 1. In the game on the right, which items can be dated using Carbon, and which can be dated using Cranium? 2. The probe says the rock has 82.3% of its Uranium atoms left. What is the rock's approximate age? Today's Agenda:
Homework:
|
Class
62
Tuesday, 3/29 Warm-Up: 1. What's the difference between a magnitude 8 earthquake and a magnitude 7 earthquake? 2. If xy = z, then Logxz = y. a. What is Log101,000? b. What is log264? c. What is log10107? d. What is log10109? Richter scale Today's Agenda:
Homework:
|
Class
61
Friday, 3/25 Warm-Up: A snail is sliming its way toward the end of a log. The snail is currently beginning Day 2 of its journey, starting out at a point 30 feet from the end of the log. Each day, the snail covers half of the remaining distance to the log's end. At this rate... 1. ...the snail will reach a point one foot from the end of the log on day____? 2. ...when will the snail reach the end of the log? 3. ...how far from the end of the log was the snail at the beginning of day 1? 4. ...in how many days (from now) will the snail be exactly 6 feet from the end of the log?
Today's Agenda:
Homework:
|
Class
60
Monday,
3/21/2016 and Wednesday, 3/23 Warm-Up: How can the person get to the oxygen tank before suffocating? Today's Agenda:
Homework: None |
Class 59
Thursday,
3/15/2016 Warm-Up Today's Agenda:
Homework: Wear rink-appropriate clothes to next class. We will be on the ice. |
Class 58
Tuesday,
3/15/2016 The map below shows the age of crust from oldest (blue = 160-180 million years) to youngest (Red = 0-10 million years). 1. What can you infer from this map? 2. Do you see something that looks wrong?
Today's Agenda:
Homework: Test on Thursday. Study. Practice drawing and/or visualizing all of the features of each plate boundary (and ocean hotspots). |
Class
57
Friday,
3/10/2016 Yesterday, for the first time in several months, there was condensation on the school toilet pipes. 1. What conditions cause water to condense on toilet pipes? 2. Why has this not happened for several months? Today's Agenda:
Homework: Use your notes to complete the Practice test, #21-30. |
Class 56
Wednesday,
3/9/2016 1. The first two pictures below show a shield volcano and a composite volcano. Which one contains more Felsic material? (Felsic magma has a higher viscosity) 2. The third volcano is a cinder cone made of mafic material. If the lava that formed the cinder cone is mafic, how is the cinder cone so steep? 3. What is a cinder? Cinder Cone Volcano Today's Agenda:
Homework:
|
Class 55
Monday,
3/7/2016 Today's Agenda:
Here's how to access the video...
Homework:
|
Class
54
Thursday,
3/3/2016 Warm-Up:
Why is the inside of Earth Hot?
Today's Agenda:
Mr. Stapleton gone next class -- Formation of The Earth
Homework:
|
Class 53
Friday,
2/19/2016 Warm-Up:
1. What do the following pairs of letters represent? RD ST ND 2. Ben and Fred played 7 games of chess, and each won the same number of games. There were no ties. How was this possible? 3. If two hours ago, it was as long after one oclock in the afternoon as it was before one oclock in the morning, what time would it be now?
Today's Agenda:
Homework:
|
Class
52
Wednesday,
2/17/2016 Warm-Up:
1. Why is the Earth's core so hot? 2. One of the rocks on the right is basalt. The other is granite. Which is which? 3. One rock is more common in the Earth's continental crust. The other is more common in the Earth's ocean crust. Guess where each is found.
Today's Agenda:
Homework:
|
Class
51
Monday,
2/15/2016 Warm-Up:
What does "randomized double-blind placebo controlled" mean when it refers to a scientific investigation?
Today's Agenda:
Handout: lab report format.
Homework:
|
Class
50
Thursday,
2/11/2016 Warm-Up:
How would you make a histogram from the squirrel and cat data on the right?
Today's Agenda:
Handout: lab report format.
Homework:
|
Class 49
Tuesday,
2/9/2016 Warm-Up:
A scientific research paper is typically divided into sections. What sections do you often find in a research paper?
Today's Agenda:
Handout: lab report format.
Links to web pages relating to lab reports:
Homework:
|
Class
48
Wednesday,
2/5/2016 Warm-Up: 2. What makes this a science class? Today's Agenda:
Homework: Complete this experimental design practice exercise. You can expect a future test over this type of process. |
Class
47
Wednesday,
2/3/2016 Warm-Up: You may have noticed that T-Tests are meant to be used for data that are normally distributed. 1. What is a normal distribution? 2. What causes data to have a normal distribution? 3. What test can you use when you have no idea how the data are distributed? Today's Agenda: Inquiry -- Experimental Design and Statistics Part 1
Part 2 -- Give and receive feedback on experimental designs. Homework: None |
Class
46
Monday,
2/1/2016 Warm-Up: Suppose you are trying to find out which brand of paper towel is most absorbent.1) What are the independent and dependent variables for this question? 2) Describe a good way to test absorbency. 3) What are some variables that you will need to control? 4) Is this the type of experiment where bias might come into play? 5) The picture on the right references the "best" towel. What makes a towel the best towel? Today's Agenda: Inquiry -- Experimental Design and Statistics
Homework: Video links must be uploaded before the beginning of next class. |
Class
45
Thursday,
1/28/2016 Warm-Up: The class performed experiments in which the dependent variable was reaction time. List some variables that should have been controlled in those experiments.Today's Agenda: Inquiry -- Experimental Design and Statistics
Homework: A1/2 -- Analyze one hypothesis and its accompanying data from page 2 of Using statistics to test hypotheses.
|
Class
44
Tuesday,
1/26/2016 Warm-Up: Sherlock says this was an accident.1. Estimate the probability (% chance) that this was an accident. 2. Estimate the probability that this was an intentional murder. 3. If you flip a coin 20 times, is there any set of results that is very likely (e.g. above 95%)? 4. If you flip a coin 20 times, is there any set of results that is very unlikely (e.g. below 5%)? The cartoon was taken from The Cartoon Guide to Statistics, by Larry Gonick. Today's Agenda: Inquiry -- Experimental Design and Statistics
2013-2014 EPS 200 Inquiry Video Library 2014-2015 EPS 200 Experimental Design Video Library Homework: A1/2 -- Brainstorm a list of at least 5 testable questions about a possible difference between two groups of data. A3/4, A5/6 -- Analyze one hypothesis and its accompanying data from page 2 of Using statistics to test hypotheses.
|
Class
43
Friday,
1/22/2016 Warm-Up: 1. In a scientific investigation, do you intentionally change (vary) the independent variable or the dependent variable? Identify the independent and dependent variable for each of the following questions. 2. Does shaving cause hairs to grow back thicker?3. Do fisherman catch more fish when the moon is full? 4. Do cats react differently to people with beards? 5. Does listening to music during tests improve test scores? 6. Does eating sugar make kids hyper? Today's Agenda: Inquiry -- Experimental Design
Homework:
|
Class
42 Tuesday,
1/12/2016 Warm-Up: The Monsoon Effect is caused by the difference between the rates of heating and cooling of land and oceans. Land has a lower specific heat, which means that it heats up and cools off more quickly than oceans. The diagram on the right shows both a side view and a map view of a continent and the adjacent ocean. 1. Is there an onshore or offshore (away from shore) breeze? 2. Is there higher pressure over the continent or over the ocean? 3. Is this summer or winter? 4. Will this effect increase or decrease the precipitation on the land? 5. Where in the world is there a very strong Monsoon Effect?
Today:
|
Class
41 Friday,
1/8/2016 Warm-Up: The tooth-like blue and red lines represent fronts, which are boundaries between masses of warm and cold air. The sharp, blue teeth represent a cold front. The dull, red teeth are a warm front. In the picture, there are two masses of cold air and one mass of warm air.
1. Where is the warm air? 2. Why are clouds forming? 3. Why does the cold front produce a more violent storm? 4. Locate the cold air, warm air, and clouds in the diagram below.
Today:
|
Class
40 Wednesday,
1/6/2016 Warm-Up: 1. Compare the jet streams on the right to the prevailing winds (far right). What do you notice? 2. What are jet streams? 3. How do jet streams affect our weather?
Today:
Homework: Work on practice quiz or midterm review |
Class
39 Monday,
1/4/2016 Warm-Up: 1) Is the current relative humidity in this room high or low? How can we measure it? 2) During a Vermont summer, nights are cooler than days, but the difference in temperature is relatively small. In dry climates, the air gets much colder at night -- even during the summer. Why? Today:
Homework:
|
Class
38 Monday,
12/21/2015 Warm-Up: 1) How often does El Nino occur? 2) What effect does El Nino typically have on the U. S. Economy? 3) If you're interested in learning more about El Nino, check out this website. 4) Assuming that Santa has to make 108 million stops in 24 hours, how fast does he have to travel? Today:
Homework:
|
Class
37 Thursday,
12/17/2015 Warm-Up: 1. What is El Nino? 2. How and why does El Nino affect the weather? Today:
Homework:
|
Class
36 Tuesday,
12/15/2015 Warm-Up: 1. The Coriolis Effect causes flying objects to curve in relation to the position of the Earth. Which way do objects curve in the Northern Hemisphere? Southern Hemisphere? 2. According to the Cyclone video, more than 99% of all Northern Hemisphere tornadoes swirl counter-clockwise. Hurricanes swirl in the same direction as tornadoes. Why? Today:
Homework: None. We will be using colored pencils. If you want nice colored pencils, you should bring your own. You will need colors for wet and dry climates and for warm and cold ocean currents. Green, brown, red, and blue work well. |
Class
35 Friday,
12/11/2015 Warm-Up: 1. In the top photograph, where should a quarterback throw the football if he wants to get it to the receiver? Why? 2. If the quarterback on in the picture is throwing to a stationary receiver, where should he throw the ball? Why? 3. You're standing on a scale model of the Earth, and the model Earth is rotating. You're at the North Pole, and you're playing catch with a friend is at the equator. How should you aim your throw to get it to your friend? 4. How should your friend aim his/her throw to get it to you? Today:
Homework: Study for Quiz/test next class. Handouts are below. Some answers are given. There should be YouTube videos for all of these. |
Class
34 Wednesday,
12/9/2015 Warm-Up:
The graphics on the right show Stirling Engines.
1. How does a Stirling Engine work? 2. How is a Stirling Engine the opposite of a heat pump? Animated Engines soda can soda can 2 single cylinder Today:
Homework: Review Questions -- humidity and heat pumps -- Read them all, but you only have to complete at least half of them for credit. Quiz/Test next Tuesday. |
Class
33 Monday,
12/7/2015 Warm-Up:
Herman takes a hot shower every morning during the winter.
Herman has tried stepping out of the shower to dry
off, and he has tried toweling off inside the shower, with
the shower curtain closed.
Herman has discovered that he stays much warmer when
he dries off before
leaving the closed shower.
All other things being equal, why is it better to dry off
inside the shower if you
want to stay warm?
Today:
Homework: Complete heat pump diagram sheet |
Class 32 Thursday,
12/3/2015 Warm-Up:
The rate at which air's temperature changes as it rises or
sinks is called the "adiabatic lapse rate." The "dry"
rate refers to air that has less than 100% relative
humidity. The "wet" rate applies to air that is
saturated (100% rh).
Why does rising saturated air cool down more slowly than rising dry air? Today:
Homework:
|
Class 31 Tuesday, 12/1/2015 Warm-Up: Today:
Homework: A1/2 -- Finish Humidity questions through #19. |
Class 30 Friday, 11/20/2015 Warm-Up: 1. How does a wetsuit keep swimmers warm? It doesn't keep them dry. 2. What is the primary cause of windchill? Today:
Homework: None |
Class 29 Wednesday, 11/18/2015 Warm-Up:
1. A man once won a bet
that he could blow 100 smoke rings with one breath of smoke.
How did he do it?
2. How does a vortex ring form? slow motion vortex ring wikipedia dolphins blowing bubble rings Today:
Homework: Test next class over...
|
Class 28 Monday, 11/16/2015 Warm-Up: 1) How does a thermos prevent heat transfer by conduction, convection, and radiation? 2) Is a thermos (and other insulators) better at keeping things warm or keeping things cool? 3) The current weather forecast is shown below. The black line represents air pressure. The red line is temperature, and blue is chance of precipitation. Dark and light regions represent night and day. What patterns do you notice?
Today:
Homework: Complete the Test review |
Class 27 Thursday, 11/12/2015 Warm-Up: Why does the bird keep drinking? Today:
Homework: Finish the "cloud formation at the equator" page of the chemistry and cloud formation notes. |
Class 26 Tuesday, 11/10/2015 Warm-Up: 1. What is dry ice? 2. What is in the fog that is produced when dry ice is mixed with water? 3. Why does this fog sink in air? Today:
Homework:
|
Class 25 Wednesday, 11/6/2015 Warm-Up: 1. Sometimes you can "see your breath." Why can't you see it right now? I know a way to make my breath visible right now. Can you guess how I do it?
Today:
Homework:
|
Class 24 Wednesday, 11/4/2015 Warm-Up: The hot air balloon on the right is typical of the hot air balloons that we have been flying in the classroom. Based on our experience yesterday, while this type of design works well in the classroom, it will not fly outside. 1. Why do you think this balloon will not perform well outside? 2. What can be done to modify the balloon so that it will fly outside? 3. What indoor flight restrictions may not apply to outdoor flights? Today:
Homework:
|
Class 23 Monday, 11/2/2015 Warm-Up:
terminal velocities of spheres Today:
Homework: Finish your Google Slides presentation. Fill out the submission form (with a pasted link) by Friday. |
Class 22 Thursday, 10/29/2015 Warm-Up: The picture on the right represents atoms, molecules, and elements.
Today:
Homework: Work on your Google Slides presentation. It's due next Wednesday. |
Class 21 Tuesday, 10/27/2015 Warm-Up: Why is it important to enter formulas into a spreadsheet, rather than just typing correct answers into the "output" cells? Today:
Thursday: Wrap up balloon launches and work on Google Slides presentations. Google Slides presentations are due by Wednesday. Also, just to be clear, the data on your Balloon Data sheet of your presentation will be graded on correctness. Homework: If you don't know what is expected for the Google Slides presentation, spend some time looking over the revised template, complete with helpful comments. To make your own presentation, just copy the template and modify it with your data and thoughts. [Remember that Groups of 3 must create narrated presentations. Google “add narration to google slides” to find out how. Here’s a link to a how-to video for adding narration using the Snagit extension in Google Chrome.] |
Class
20 Friday, 10/23/2015 No Warm-up today. Mr. Stapleton is in the Missouri Breaks of Montana. He will be going to look at these elk tonight. They are off limits to hunting, but they're fun to watch -- and fun to hear when the bulls are bugling. Scroll down to last class (#18) for today's directions.
|
Class
19 Wednesday, 10/21/2015 Warm-Up: Brainteasers... 1. What 5-letter word does every educated person pronounce wrong? 2. Forward I'm heavy; backward I'm not. What am I? 3. There are three misteaks in thi sentence. Identify them. Today:
Friday: Mr. Stapleton is gone. Class in the library computer lab.
Tuesday: Test in library computer lab. Mr. Stapleton is back. Thursday: Wrap up balloon launches and work on Google Slides presentations. Presentations are due by ??? Homework: You might want to get a head start on test preparation. You can create some notes for yourself. |
Class
18 Monday, 10/19/2015 Warm-Up: The density of air changes from day to day. What factors affect the density of air? Today:
Homework: If you did not complete the homework for last class, complete it. For this assignment, you can still get credit. |
Class
17 Thursday, 10/15/2015 Warm-Up: Felix Baumgartner jumped from a helium-filled balloon at an altitude of 135,890 feet. Why was his balloon so loosely inflated? Today:
Homework: Make a copy of this spreadsheet. Re-save it with your name in the title. Complete it by entering formulas. Then share it with jstapleton@ccsuvt.org. Here's a step-by-step video showing how to do this. |
Class
16 Thursday, 10/8/2015 Warm-Up: 1. Which balloon is heavier -- or do they have the same weight? 2. What is the mass of the hot air inside each balloon? 3. If you had only an understanding of density -- and no understanding of Archimedes' Principle -- you could still solve this problem. How? 4. If you scale up the height of a 3-D object by a factor of 4, what does that do to the object's surface area? What about its volume? Today:
Homework: Prepare for a short quiz next class. There will just be one question. Partial credit may be awarded if you clearly show your work. Click here for an example question and answer. |
Class
15 Tuesday, 10/6/2015 Warm-Up: 1. What is the formula for density? 2. How can the triangle on the right be used to represent this equation? 3. Rearrange the density formula to solve for mass. Mass = _____. 4. Rearrange the density formula to solve for volume. Volume = _____. Today:
Homework: Hot air Balloon Problems set 3. |
Class
14 Friday, 10/2/2015 Warm-Up: 1. Geometrically speaking, what is a Net?
2.
How does a hot air balloon work? Today:
Homework: None, unless you want to work on the your hot air balloon design. The library computers all have Rhino. |
Class
13 Wednesday, 9/30/2015 Warm-Up:
What happens when you put something in a glass bell jar
(pictured on right) and pump the air out of the jar? What
would happen with... Today:
Homework:
|
Class
12 Monday, 9/28/2015 Warm-Up: 1. A jet of air can be used to levitate a ping-pong ball. The most curious thing about this is that the position of the ball in the jet of air remains fairly stable. The ball is attracted to the jet of air. What does this tell you about the pressure of fast-flowing air? 2. What happens if you add a backward funnel to the hose and try this with a balloon? 3. Did you see the lunar eclipse? Why did it happen? Why was the moon red? Today:
Homework:
|
Class
11 Thursday, 9/24/2015 Warm-Up: A piece of foam floating in a glass jar usually wants to move to the side of the jar. Why? How can you get the foam to want to stay in the middle? Today:
Homework:
|
Class
10 Tuesday, 9/22/2015 Warm-Up: The fall equinox is supposed to arrive at 4:21 AM tomorrow. What does that mean? Today:
Homework: None |
Class
9 Friday, 9/18/2015 Warm-Up:
Today:
Handouts: Homework: Study -- Test next class.
|
Class
8 Wednesday, 9/16/2015
Warm-Up: Examine the mercury barometer on the right. 1. Do you understand how it works? 2. If you were given some mercury, a long test tube, and a bowl, could you make one? [Unfortunately, Hg is toxic, so if you find a bunch, please don't actually try this.] 3. Why is the vacuum at the top important? What is a vacuum? 4. If this barometer were made using water instead of mercury, would the tube need to be longer or shorter? Today:
Handouts: Practice Test Homework: Practice Test
|
Until recently, the Bathyscaphe Trieste (shown on the right) was the only manned vessel to have reached the deepest part of the ocean. Except for the spherical "pressure chamber" on the bottom of the Trieste, most of the vessel was filled with gasoline. The pointy "hoppers" on the bottom were filled with bits of iron that could be released by the pilots. The vessel had no motor. In 2012, James Cameron (moviemaker etc.) dove even deeper in a much smaller submarine, the Deepsea Challenger.
Today:
Handouts: Air Pressure, Part 2 (Archimedes Principle) Homework: Buoyancy Questions
|
Class
6 Thursday, 9/10/2015 Warm-Up: Suppose there is a freshwater iceberg floating in a freshwater lake. If no water is lost to evaporation, seepage, etc., what will happen to the surface level of the lake when the iceberg melts? Will it rise, sink, or stay the same. Why?Today:
Handouts: Homework:
|
Class
5 Tuesday, 9/8/2015 Warm-Up: 1. Suppose you want to search an area of the ocean for lobsters. You don't have a scuba tank, so you will be using a snorkel. You want to be as deep as possible, so you would like to use as long a snorkel as possible. Is there a limit on how long snorkels should be? If so, what is it? 2. Suppose you're standing on a balcony, and you want to steal the drink of someone standing below. You carefully lower a tube into the drink and suck up the liquid before anyone notices. Could this really work? Explain. 3. What's the current relative humidity? What does relative humidity mean? Today:
Handouts: Homework: Air pressure questions |
Class
4 Thursday, 9/3/2015 Warm-Up: 1. What would happen if you made a hole through the center of the Earth, and you jumped in? (antipodes map) 2. The formula on the right calculates the force of gravity between two objects. m1 is the mass of the first object; m2 is the mass of the second object; d is the distance between their centers, and G is a constant (number that never changes). a. According to the formula, what would happen to your weight if your mass were doubled? b. What would happen to your weight if the Earth's mass were doubled? c. What would happen to your weight if your distance to the Earth's center were doubled? Today:
Handouts: Air pressure Notes, part 1 Homework: None |
Class
3 Tuesday, 9/1/2015
Warm-Up:
A balloon is filled with air, and a string is used to tie a rock to the balloon. As the diagram on the right shows, the balloon and rock float at the surface of a lake. However, when they are pulled to the bottom, they stay there. When they are returned to the surface, they once again float. How can this happen? Consider mass, volume, density, and weight. Today:
Handouts: Air pressure Notes, part 1 Homework:
|
Class
2 Friday, 8/26/2015
Warm-Up:
This bottle on the right contains a "cartesian diver." The diver dives when the bottle is squeezed, and the diver rises when the bottle is released. 1. As the bottle is squeezed, what is happening to the diver's density, volume, and mass? 2. Why are those properties changing in those ways? Today:
Handouts: None Homework:
|
Class 1
Wednesday 8/26/2015
Warm-Up:
Today:
Handouts:
Homework:
|
Class 0
Tuesday 8/25/2015
(15 minute class) 935-950, 955-1010, 1015-1030
Warm-Up:
Can you point to the North Pole? Today:
Homework: None |