4.1 TEST

Is gravity an invisible force?

• Yes

• No

The force of gravity varies __________ with the masses of the objects and inversely with the square of the distance between them

• directly

• Inversely

The ancient Greeks believed that objects fell to Earth because Earth was

• the center of the universe and matter wanted to be closer to this center.

• the center of the ocean and matter wanted to be closer to this center

• the center of the universe and matter wanted to be far away from this center.

_____________ is the force which masses attract one another

• Gravity

• Power

• Electricity

_____________ causes celestial objects such as planets and stars to be formed from small pieces of dust

• Gravity

• Electromagnetic force

• Magnetic force

Who was the first scientist to make such carfuls observations about gravity?

• Galileo

• Newton

• Einstein

when a skydiver jumps from a plane, then opens a parachute, he will speed up continuously until the parachute opens, and

• will then slow up, and will finally fall at a steady rate.

• will then slow down, and will finally fall at a steady rate.

• will then slow down, and will finally be destroyed

Does gravity affect small objects and large objects?

• Yes

• No

What is the most massive object in our solar system?

• Sun

• Jupiter

• Moon

• Earth

Is gravity giving weight?

• Yes

• No