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Definition
| Gravity is a force that objects exert on each other because of their _____________. |
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Gravity is not just present on Earth. It is a _________________
force. |
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| If you increase the mass of two objects, then their gravitational force will ___________________. |
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| As distance increases, gravitational force between two objects ___________________. |
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| This is the force of gravity on an object. |
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Which of the following can change depending on where you are?
A. mass B. weight
C. area D. size |
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| What keeps planets in orbit? |
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| The paths that planets take in their orbit are ______________. |
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Objects in orbit are really
A. remote controlled.
B. weightless.
C. falling very fast.
D. not moving at all. |
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Definition
| ____________________ is a force that resist the motion of two surfaces in contact. |
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Definition
Which of the following is NOT an example of a fluid?
A. water B. air
C. oil D. ice |
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| ____________________ is a measure of how much force is acting in a certain area. |
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You can increase the pressure on an object by
A. decreasing the force. B. increasing the area.
C. increasing the force. D. removing the force. |
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| At sea level, the pressure of the air in the atmosphere exerts __________ pressure on every square centimeter of your body. |
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| As you climb higher into the atmosphere, air pressure |
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Air at lower levels of the atmosphere is
A. thinner. B. colder.
C.denser. C. less dense. |
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Definition
| How deep could you swim before the pressure in the water would collapse your lungs? |
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| This is an upward force on objects in a fluid. |
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Definition
| In a fluid, pressure increases with ____________________. |
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A balloon is hard to hold under water because of the higher pressure on the ____________________ of the balloon.
A. top B. bottom
C.middle D. core |
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Definition
| If an object is denser than the fluid it is in, then it will _____. |
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| ___________________________ states that the faster a fluid moves, the lower the pressure it exerts on the surface it is moving over. |
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| When an airplane takes off, the shape of the wing creates high pressure below and low pressure above it. This force is known as _________________________. |
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| This force of flight is produced by the friction of the surface of the plane and the air. |
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| This French scientist experimented with fluid in containers and found that when an outside pressure is applied at any point to a fluid in a container, that pressure is transmitted throughout the fluid with equal strength. |
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