Effects of Gravity Reading & Quiz

What is gravity?

• A force that pulls objects towards the center of the Earth

• A force that pushes objects away from the center of the Earth

• A force that pushes objects towards the South pole

• A force that pulls objects towards the North pole

Why do stars, planets, and moons have a round shape?

• Gravity pulls equally from all directions towards their center

• Gravity pulls more from the East and West

• Gravity pulls more from the North pole

• Gravity pulls more from the South pole

How did gravity help form our solar system?

• Gravity caused a huge disk of dust and gas to orbit around the sun

• Gravity caused the sun to explode and form a disk of dust and gas

• Gravity caused the planets to collide and form a disk of dust and gas

• Gravity caused the sun to collapse into a disk of dust and gas

What is an orbit?

• When an object moves in a straight path towards another object

• When an object moves in a straight path away from another object

• When an object moves around another object in a straight line

• When an object moves around another object in a circle or oval

Why do we have tides in our oceans?

• The moon's gravity pulls on our oceans

• The other planets' gravity pulls on our oceans

• The sun's gravity pulls on our oceans

• The Earth's gravity pulls on our oceans

What holds down our atmosphere?

• The moon's gravity

• The sun's gravity

• The Earth's gravity

• The planets' gravity

What does gravity do to objects on Earth?

• Pushes them away from the center of the Earth

• Pulls them towards the center of the Earth

• Pulls them towards the North pole

• Pulls them towards the South pole

What general shape do stars, planets, and moons have?

• None

• Round

• Random

• Scattered

What causes the high and low tides in our oceans?

• The sun's gravity heats up the water and makes it expand.

• The other planets' gravity attracts the water because they don't have any.

• The Earth's rotation spins the water out in a disk.

• The moon's gravity pulls on the ocean on that side of the planet, causing it to bulge out.

What happens when an object has more mass?

• Its gravitational force stays the same

• Its gravitational force becomes stronger

• Its gravitational force disappears

• Its gravitational force becomes weaker