Solar system

Question 1

Planets

Answer 1

Must orbit around the Sun, have a nearly spherical shape and have a mass much larger than the total mass of other objects.

Question 2

Dwarf planets

Answer 2

Spherical-shaped object that orbits the Sun but DOES NOT have more mass than the objects around it

Question 3

Asteroid belt

Answer 3

Million of small, rocky objects that are between Mars and Jupiter

Question 4

Comet

Answer 4

made of gas, dust and ice and moves around the Sun in an oval-shape

Question 5

Meteoroids

Answer 5

Debris left by colliding asteroids of dispersing comets

Question 6

A unit of measurement from the sun to a planet in the solar system

Answer 6

Astronomical Units

Question 7

geocentric (Earth-centered) model-

Answer 7

Early greeks thought planets, the sun, moon, and the stars orbited around Earth

Question 8

Heliocentric (Sun centered) model

Answer 8

Nicholas Copernicus and Galileo Galilei, observed that the moon revolved around the Earth and that the earth and other planets orbit the sun

Question 9

Who were the people who came up with the Heliocentric model?

Answer 9

Nicholas Copernicus and Galileo Galilei

Question 10

When do astronomers believe when the solar system began?

Answer 10

4.6 billion years ago

Question 11

________ _____ produces enormous amounts of energy in the Sun

Answer 11

Nuclear Fusion

Question 12

Objects that orbit the Sun?

Answer 12

Planets, dwarf planets, asteroids and comets

Question 13

How many number of planets are in our solar system?

Answer 13

Eight (8)

Question 14

The shape of a planet’s orbit?

Answer 14

Elliptical orbit

Question 15

planet moves ____ when closer to the sun

Answer 15

Faster