Gravity is an invisible force that pulls on objects. The strength of gravity an object has depends on its ___________________________.

• Color

• Size

• Mass

Answer explanation

The strength of gravity an object has depends on its Mass.

Astronauts feel weightless in space because?

• Their spaceships are flying too fast.

• They are too far away from Earth to feel gravity.

• They don't have enough air to breathe.

Answer explanation

Astronauts feel weightless in space because they are too far away from Earth to feel gravity.

Which of these natural phenomena is caused by the Moon's gravity pulling on Earth's oceans?

• Tides

• Seasons

• Day and Night

Answer explanation

Tides are caused by the Moon's gravity pulling on Earth's oceans, resulting in the rise and fall of sea levels.

Isaac Newton is credited with first describing the force of gravity. According to gravity, what happens to the force of gravity between two objects as they get farther apart?

• It gets stronger

• It stays the same

• It weakens

Answer explanation

According to gravity, the force of gravity weakens between two objects as they get farther apart.

An object will fall faster to the ground if it ______________.

• It is lighter in weight

• It is dropped from a higher distance

• It is dropped underwater

Answer explanation

An object will fall faster to the ground if it is dropped from a higher distance.

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

 

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

• 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

Answer explanation

Gravity pulls the airplane downward when the pilot slows the engine's speed, assisting in flight by creating a downward force.

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

• The meteorite flies past Earth

• The meteorite orbits around Earth

• The meteorite hits Earth and makes a crater

Answer explanation

The most likely outcome of a meteorite's encounter with Earth would be that it hits Earth and makes a crater, as meteorites typically collide with the Earth's surface upon entry.

Earth’s water level _______________ on the side of Earth facing the moon.

• Stay the same

• Rise

• Fall

Answer explanation

Earth’s water level rises on the side of Earth facing the moon.

Because the tilt of Earth’s axis always points in the same direction, the seasons in the Northern Hemisphere and the Southern Hemisphere are always ___________________.

• Opposite

• the same

• 3 months apart

Answer explanation

Because the tilt of Earth’s axis always points in the same direction, the seasons in the Northern Hemisphere and the Southern Hemisphere are always opposite.

Which would happen if Earth was not tilted toward or away from the Sun?

• Darkness would last all day

• Days would be much longer and nights would be shorter

• Days and nights would be about equal in length

Answer explanation

Days and nights would be about equal in length