2. Good Day 11/20/2016 Starter: Is there such a thing as a sucking force? Starter: Is there such a thing as a sucking force? Please turn in your lab packet from thrusday. Please turn in your lab packet from thrusday. Please take out your review sheet and study, we have a test today! Please take out your review sheet and study, we have a test today! Before we go over the answers we will pass back work and look at the gradesheet. Before we go over the answers we will pass back work and look at the gradesheet. Answer: No!, Science never sucks! Answer: No!, Science never sucks!

3. Review for Fluid Forces

4. How would you describe Buoyancy to someone? I would tell them that it is the force pushing up on objects in water. If they want more let them ask. I would tell them that it is the force pushing up on objects in water. If they want more let them ask. Then tell them about displacement and how the water supported the water that you moved out of the way. Then tell them about displacement and how the water supported the water that you moved out of the way.

5. How can you figure out an objects buoyancy force? Buoyancy Force is equal to the weight of the water that is displaced, so measure that Buoyancy Force is equal to the weight of the water that is displaced, so measure that

6. How can you increase it? Displace more water, this is the only way to increase Buoyancy force. Displace more water, this is the only way to increase Buoyancy force.

7. What is the equation for density?

8. Why does oil float on water? This isn’t on the review but it is a good question anyway. This isn’t on the review but it is a good question anyway. The oil is less dense and that is why it is on top. The oil is less dense and that is why it is on top. It has fewer grams per milliliters. It has fewer grams per milliliters.

9. What is the density of water? 1 gram/milliliter 1 gram/milliliter Or 1 kilogram/liter Or 1 kilogram/liter

10. How is density related to buoyancy? Density is mass divided by volume. Mass represents the force of weight, volume represents buoyancy force. Density is mass divided by volume. Mass represents the force of weight, volume represents buoyancy force.

11. What causes air pressure? Air! Well air and gravity pulling down on the air molecules Air! Well air and gravity pulling down on the air molecules

12. What is the easiest way to change the pressure around you? Change your elevation (go up a mountain, or down to sea level) Change your elevation (go up a mountain, or down to sea level)

13. What happens to a balloon when you go up in elevation? It expands because the pressure outside of the balloon is lower than it was when the balloon was at lower elevations. It expands because the pressure outside of the balloon is lower than it was when the balloon was at lower elevations.

14. Why do your ears pop when you dive down in a swimming pool? The pressure at the bottom of the pool is greater and The pressure at the bottom of the pool is greater and your ears are trying to equalize the pressure. your ears are trying to equalize the pressure.

15. Hydraulics

16. How is pressure distributed in a confined fluid? It is evenly distributed It is evenly distributed

17. What are the benefits of a hydraulic lift? It can multiply your force! It can multiply your force!

18. What happens to pressure when air moves? It goes down or It goes down or Moving air creates a (everyone together now) LOWER PRESSURE! Moving air creates a (everyone together now) LOWER PRESSURE!

19. Why does the pressure go down? The pressure goes down because it was the air molecules that were causing the pressure. The pressure goes down because it was the air molecules that were causing the pressure. When you move them out of the way the pressure has to go down. When you move them out of the way the pressure has to go down.

20. How do airplanes fly? It is a combination of the fact that the wing is both curved and tilted at an angle. It is a combination of the fact that the wing is both curved and tilted at an angle. The curve or shape creates a low pressure space on top. The curve or shape creates a low pressure space on top. The angle forces air down and the air forces the wing up. The angle forces air down and the air forces the wing up.

21. Gas Behavior

22. Pressure goes up, Temperature goes up

23. Volume and temperature are related by the fact that they increase together.

24. One way to decrease the volume of a gas is to INCREASE the pressure.

25. What could happen to a window if there is a high speed wind were moving on only one side? It could pop right out! It could pop right out! This is because of the very low pressure. This is because of the very low pressure.