Which are the major factors that determine the strength of an object's gravitational pull:

• Its mass

• How close the things are together

• The moon and the stars

• Its shape

Will a feather and a watermelon fall at the same speed in a vacuum?

• No, the feather will fall before

• No, the watermelon will fall after

• Yes

• No, the watermelon will fall before

• No, the feather will fall after

Without gravity if we throw an egg it...

• will crash on the floor

• won't crash on the floor

• won't float into the air

• will break in the air

What keeps the Earth in orbit around the sun?

• Star's gravity

• Moon's gravity

• Sun's gravity

The smaller the mass of the object...

• the more gravity it will have.

• the less gravity it will have.

What has the strongest gravitational pull in the universe?

• Stars

• The sun

• Black holes

• Planets

What causes the ocean tides?

• The gravity of the Moon

• The gravity of the Sun

• The gravity of the Earth

The moon is in orbit around Earth because of

• the oxygen in the air

• the sun

• the ozone layer

• gravity

Who discover gravity?

• Leonardo da Vinci

• Platón

• Isaac Newton

• Descartes