Stars
Motions of Earth
The Solar System
Earth Systems
100
The property of stars that scientists use to determine the temperature of a star.
What is color?
100

The orbit of an object around another object.

What is Revolution?

100

It orbits the sun and its massive enough to be nearly a sphere in shape. It has no other objects in its orbital path.

What is a planet?

100

The mixture of gases that forms a layer around Earth.

What is the atmosphere?

200

This is the distance light travels in one year.

What is a light-year?

200

This element is what keeps the sun, moon and planets in place.

What is gravity?

200

They orbit the sun but they share their orbital paths with other objects of similar size.

What is a dwarf planet?

200

The two elements that make up the Earths atmosphere.

What is oxygen and nitrogen?

300
The most common elements in which stars are composed of.
What are hydrogen and helium?
300

It is the spin of an object around its axis. 

What is Rotation?

300

It divides what are the inner planets to the outer planets.

What is the asteroid belt?

300

The system containing all of Earths water.

What is the Hydrosphere?

400

The name of the galaxy that we live in.

What is the Milky Way Galaxy?

400

The amount of time it takes Earth to make a full rotation.

What is 24 hrs?

400

Name the inner planets in order.

What is Mercury, Venus, Earth and Mars?

400

Name the structure of the geosphere.

What is the crust, mantle, outer core and inner core?

500

The huge collection of stars, gas and dust.

What is a galaxy?

500

The amount of time it takes Earth to revolve around the sun once.

What is 365 days?

500

Explain why Neptune has a blue color.

What is methane in its atmosphere?

500

Name the layers of the atmosphere.

What are the troposphere, stratosphere, mesosphere, thermosphere and Exosphere?