Planets
Vocabulary
Discovery
Cycles
Stars
100

First four planets closest to the Sun that are made of rock are called the ___________ planets. 

What are the inner planets?

100

For something turns on an axis 

What is rotate? 

100

A craft that travels into space with instruments, but not people. 

What is a space probe? 

100

These two things cause the change of seasons on Earth

What is the Earth's tilt on its axis and its revolving around the Sun 

100

The reason stars always stay in the same position 

What is "Stars do not orbit planets or the Sun. 

200

The outer planets are called this because of what they are made of and how large they are. 

What are the Gas Giants?

200

An imaginary line through the center of an object. 

What is an axis?

200

This optical telescope travels around the Earth taking pictures? 

What is the Hubble Space Telescope?

200

The length of time it takes a planet to make one revolution around the sun.

What is a year? 

200

The reason some stars appear brighter than others. 

What is their distance from the earth? 

300

This planet gets just the right amount of heat and light to support life. 

What is Earth?

300

The imaginary line that circles the Earth halfway between the North and South Poles.

What is the equator? 

300

Large spacecraft that orbits the earth with astronauts living and working aboard.

What is the International Space Station? 

300

One rotation of the Earth (or any other planet).

What is a day? 

300

A group of starts that forms a pattern, such as an animal, person, or object 

What is a constellation? 

400

In between the inner planet and out planets 

What is the asteroid belt? 

400

This planet spins in the opposite direction of the other planets and is hottest planet because of its its extremely thick atmosphere of carbon dioxide. 

What is Venus? 

400

A tool used by scientist to make objects in space look larger. 

What is a telescope? 

400

This keeps all the planets in their orbit around the sun. 

What is gravity? 

400

The largest object in our solar system that life depends for heat and light. 

What is the sun?

500

 The dark figure cast upon a surface by a body intercepting the rays from a source of light

What is a shadow?

500

The Sun and all the other objects that orbit make up the 

What is the solar system? 

500

This natural sphere orbits the Earth every 27 days. 

What is the moon? 

500

A planet's year is dependent on this 

What is its distance from the sun? 

500

The moon does not make its own light by ________ the sun's light. 


What is reflects? 

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