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Science section. 1
Chapter 21
| Question | Answer |
|---|---|
| Any material that can flow and takes the shape of its container is called a _________. | Fluid |
| What are two types of fluids? | Liquids and Gases. |
| What can particles in a fluid do? | Flow because the particles in fluids move easily past eachother. |
| What happens when you pump up a bicycle tire? | You push air into tire. |
| The amount of force exerted per unit area of a surface is called _________. | Pressure |
| Force divided by area equals _________. | Pressure |
| The SI unit of pressure is the _______. | Pascal |
| What is the force of one newton exerted over an area of one square meter? | One pascal. |
| Why does a soap bubble get rounder instead of longer as you blow into it? | Because the shape partly depends on an important property of fluids. |
| What is pressure caused by the weight of the atmosphere? | Atmosphereic Pressure. |
| The percentage of gases found within 10km of Earth's surface is _____. | 80 |
| The force that holds the atmosphere in place is _______. | Gravity |
| What is the number of newtons pressing on every square centimeter of your body? | 10. |
| As you travel "deeper" into the atmosphere, how is atmospheric pressure affected? | Pressure increases as the atmosphere gets "deeper." |
| Why do your ears pop when you take off in an airplane? | Fluids in your body are ajusting to maintain equal pressure. The fluids in your body have to adjust to maintain equal pressure. |
| Water pressure increases as ______ _________. | Depth increases |
| Water pressure and atmospheric pressure affect total pressure on objects that are _____________. | Underwater |
| Water pressure does NOT depend on ____ ______ ________ ___ ________ __________. | The total amount of fluid present |
| Water is about 1,000 times more dense than ___. | Air |
| The amount of matter in a given volume is called ________. | Density. |
| Why does water exert more pressure than air? | Water is more dense tahn air. |
| If you dive underwater to 10M, the pressure is almost ______ as much as the atmospheric pressure at the surface. | Twice |
| At sea level, atmospheric pressure is 101kPa and 10M under the water the water pressure is about _____. | 201kPa |
| How does pressure change as you drink through a straw? | There is less air in the straw, so the pressure in the straw is reduced. |
| What happens when pressure is lower inside the lungs than outside the lungs? | Air flows into the lungs from high to low pressure. |
| How do pressure differences affect the direction in which fluids flow? | High pressure to low pressure. |
| How do pressure differences affect of a tornado's winds? | The tornado is lower than the air pressure outside the tornado. |
Created by:
banana10h