Science Unit 4: Lessons 1-3

In which direction does Earth's gravity pull?

• toward the sun

• toward Earth's center

• toward the North Pole

• toward the tallest mountain

The force of gravity between two objects increases as they are

• spread apart

• moved closer together

• cooled

• heated

Tags

NGSS.MS-PS2-4

The sun's gravity is __ Earth's because the sun is __ than Earth.

• stronger than; smaller

• weaker than; bigger

• stronger than; bigger

• weaker than; smaller

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-2

The moon's gravity is weaker than Earth's. If you went to the moon, you would

• shrink and become shorter.

• weigh less than you do on Earth.

• float off into space.

• not jump as high as you do on Earth.

Tags

NGSS.MS-PS2-4

Distances in space are so great, they are often measured in ___.

• meters

• light-years

• feet per second

• centimeters

The sun has the highest apparent brightness to Earth because it

• is closer to Earth than any other star

• is larger than any other star

• produces more light than other stars

• is hotter than other stars

Apparent brightness is

• the light from a sunset

• a measure of how bright a star looks from Earth

• the distance that light travels in one year

• none of the above

What causes day and night?

• Earth moves closer to and farther away from the sun.

• Earth rotates on its axis.

• The sun's light gets brighter and darker in a pattern.

• The moon moves into and out of the sun's light.

Tags

NGSS.MS-ESS1-1

How does the sun's gravity affect Earth?

• It causes objects to fall to Earth's surface.

• It holds Earth in an orbit around the sun.

• It causes the moon to rotate around Earth.

• It doesn't; the sun is too far away for its gravity to affect Earth.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

Why does only a small part of a star's light reach Earth?

• The sun absorbs most of the light.

• The atmosphere blocks most of the light.

• The light is destroyed by the darkness of space.

• The light rays spread out at they move through space.