Science Quiz: The Role of Gravity

Juanita is standing on the ground located at the North Pole. Clara is standing on the ground located at the South Pole. Explain how both can stand with their feet on the ground.

• Because the Earth is round, both can stand upright at the poles.

• Because the Earth is flat, both can stand upright at the poles.

• Because the Earth is a cube, both can stand upright at the poles.

• Because the Earth is a triangle, both can stand upright at the poles.

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NGSS.MS-PS2-4

Things we drop fall to the ground because (a)   pulls them down.

• friction

• gravity

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Which explains how gravity works to assist the flight of an airplane?

• It pushes up on the wings of the airplane to create lift.

• It helps to propel the plane forward as its speed increases.

• It pushes the airplane from all directions to help it stay in the air.

• It pulls the airplane downward when the pilot slows the engine's speed.

Simon weighs 90 lbs on Earth; how many pounds will he weigh on the moon?

Mathematical Equivalence

ON

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What force makes an apple fall to the ground?

• gravity

• air resistance

• size

• weight

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NGSS.MS-PS2-2

If you threw a ball up on the Moon, it would go up 6 times higher than on Earth. Explain how this is possible.

• The Moon has no atmosphere to slow the ball down.

• The Moon's gravity is weaker than Earth's gravity.

• The ball is lighter on the Moon.

• The Moon's surface is smoother than Earth's.

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NGSS.MS-PS2-4

Earth's water levels (a)   on the side of Earth facing the moon.

• rise

• fall

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Which would be the most likely outcome of a meteorite's encounter with Earth?

• The meteorite orbits around Earth.

• The meteorite flies past Earth.

• The meteorite hits Earth and makes a crater.

• The meteorite burns in Earth's atmosphere.

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NGSS.MS-ESS3-2

On the moon, craters are formed when (a)   hit the surface.

• meteoroids

• comets

Clayton and Brianna are getting ready to watch a meteor shower. Clayton wonders how space rocks become meteors and meteorites. How can Brianna explain this phenomenon to Clayton?

• Space rocks become meteors when they enter Earth's atmosphere and burn up, and meteorites when they reach the ground.

• Space rocks become meteors when they collide with each other in space, and meteorites when they explode.

• Space rocks become meteors when they are pulled by the moon's gravity, and meteorites when they orbit Earth.

• Space rocks become meteors when they are heated by the sun, and meteorites when they cool down.