Solar System
Space Rocks
Moon Phases
Seasons
PBO
100
What is in the center of the solar system?

What is the sun?

100

What generally happens when a comet nears the sun?

What is its gas burns up?

100

Why does the moon look illuminated (lit)?

What is the sun's reflection?

100

What causes day and night?

What is Earth's rotation?

100

The layer of gas surrounding planet Earth that is held in place by gravity and composed of a limited number of elements primarily nitrogen and oxygen.

What is atmosphere?

200

What are the names of the inner planets?

What is Mercury, Venus, Earth, and Mars?

200

What space object has three parts a nucleus, coma, and tail?

What is a comet?

200

How long does it take for the moon to go through all of its phases?

What is one month?

200

When the moon blocks the sun?

What is a solar eclipse?

200

The curved path of a celestial object or spacecraft around a star, planet, or moon especially a periodic elliptical revolution.

What is orbit?

300

What is it called when the Earth and other planets revolve around the Sun and the Moon revolve around the Earth.

What is the Sun-Centered Model?

300

A piece of rock made up of material like that which formed the planets.

What is an asteroid?

300

What effect does the moon have on tides?

What is the gravity of the moon pulls the ocean which causes the tides?

300

When the sun is directly above the equator?

What is an equinox?

300

The natural satellite of the earth, visible by reflected light from the sun.

What is moon?

400

Which planet has no true atmosphere?

What is Mercury

400

A large meteoroid that does not burn up completely in Earth's atmosphere and strike the Earth.

What is a meteorite?

400

Why is the same side of the moon always facing the earth?

What is the moon turns on its axis at the same rate it revolves around the Earth?

400

How long does it take for Earth to rotate?

What is 24 hours?

400

The time taken by a celestial body to make a complete round in its orbit.

What is revolution?

500

How did the solar system form?

What is a cloud of gas, ice, and dust that form a tightly packed spinning disk?

500

The flash of light from a meteoroid falling through Earth's atmosphere is called?

What is a meteor?

500

What is the order of the moon phases?

What is new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, last quarter, waning crescent?

500

What is the movement of material inside Earth's core, along with Earth's rotation generate?

What is a magnetic field?

500

The periodic rise and fall of the waters of the ocean and its inlets, produced by the attraction of the moon and sun, occurring about every 12 hours.

What is tide?