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English 46 Public

Gravity, Planets, Moons and Space Objects

Study Slideshow

Which model of the universe placed the sun in the middle of the solar system?

Heliocentric Model

15

Which model of the solar system placed the earth in the middle, and incorrectly stated that earth does not rotate?

Geocentric

15

What celestial body was at the center of the heliocentric model of the solar system?

the sun

10

What celestial body was at the center of the geocentric model of the solar system?

the earth

10

What celestial body is formed from a swirling cloud of dust and gas?

a star

15

Why is it so difficult to have a scale model of the solar system?

It's too big! There is so much empty space between the planets.

15

What is the force that pulls bodies of mass towards each other?

gravity

15

True or False: Ancient astronomers thought the earth did not rotate.

TRUE

10

What are the TWO FORCES that keep a planet orbiting a star?

Gravity and Inertia

20

WHICH ONE? Larger objects with MORE MASS have...MORE or LESS gravity?

MORE!

15

What force pulled most of the matter to the center of the newly forming solar system?

gravity

15

Why are planets round (spherical)?

The gravity pulls the mass towards the center of the mass

20

What is a small, irregularly-shaped space object that is usually found between Mars and Jupiter?

Asteroid

15

What is the collection of asteriods located between Mars and Jupiter called?

Asteroid Belt

15

What is the space object, made of rock or ice & rock, that orbits a planet?

a moon

20

These are known as "shooting stars" as they streak across the sky in our atmosphere.

Meteors

20