Assessment: Gravity

5. What effect does the force of gravity have on the shape of the Earth?

• The force of gravity pulls all objects, including the mass of the Earth, toward the center of Earth, causing Earth's surface to curve.
• The force of gravity pushes all objects away from the Earth's surface, creating a flat shape.
• The force of gravity only affects the shape of mountains and valleys on Earth.
• The force of gravity has no impact on the shape of the Earth.

Tags

NGSS.MS-PS2-4

6. Buoyancy is an upward force on an object submerged in a fluid, such as water or air. This force causes objects to float, such as boats or lifejackets. True or false: The force of buoyancy works against the force of gravity.

• True
• False

7. Omar is planning an experiment where he will drop various items from the top of his stairs and keep track of how long each item takes to fall. Which object would be more affected by air resistance?

• a sheet of paper wadded into a ball
• a flat sheet of paper

8. Which of the following is the best explanation for why a ship seems to disappear when it passes the horizon?

• The ship enters a different ocean as it moves away, causing it to vanish from sight.
• As a ship moves away, it goes below the horizon because the Earth is curved. This makes it appear to disappear.
• The ship gets hidden by clouds or fog as it moves towards the horizon, making it appear to disappear.

9. Sir Isaac Newton discovered gravity when he saw an apple fall to the ground and wondered why it fell downwards instead of floating up into the sky. He determined that there must be a force that pulls objects towards _______________. He named this force gravity.

• the atmosphere
• the Sun
• the center of the Earth
• the ocean

10. Imagine a world without gravity. Which of the following would NOT happen?

• Objects would float freely in the air.
• People would feel weightless and could jump very high.
• Cars would be able to drive on the roads.
• Trees and plants would grow straight up without bending.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

a force that is caused by air and works against gravity

• gravity

• spherical

• Lunar eclipse

• air resistance

the force that pulls objects toward the center of the Earth

• gravity

• spherical

• Lunar eclipse

• air resistance

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

when Earth comes between the Sun and the Moon, and Earth's shadow falls on the Moon

• gravity

• spherical

• Lunar eclipse

• air resistance

Tags

NGSS.MS-ESS1-1

rounded

• gravity

• spherical

• Lunar eclipse

• air resistance

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2