1
2
3
4
5
100

The _____ is the center of our universe. 

The Sun

100

It takes ____ hours for the Earth to make one complete rotation.

24

100

Ocean water rises during ______ tide. 

High

100

One AU is equal to ____________ miles.

93 Million (93,000,000)

100

The _______ is the center of a comet.

Nucleus

200

Earth travels in an ___________ orbit.

Elliptical

200

The moon is _______ miles from the Earth.

238,000

200

The force of _____ is responsible for producing the tides.

Gravity

200

The planet that is farthest from the sun is called ______.

Neptune

200

The _____ of a comet is made from evaporated dust and gas. 

Coma
300

One complete Earth orbit of the sun is called a ______.

Revolution

300
The moon is called a natural _____ of the Earth.

Satellite

300

People first landed on the moon in the year ____.

1969

300

A small chunk of rock that orbits the sun is called an _________.

Asteroid
300

A small asteroid is called a ________.

Meteoroid

400

It takes ______ days for the Earth to orbit the sun.

365

400

The part of the moon that we see from Earth at a particular is called its _____.

Phase

400

The number of planets in our solar system is ___.

8

400

The asteroid belt is located between the planets ______ and _______.

Mars and Jupiter

400

A meteor that falls to Earth is called a ________.

Meteorite

500
The Earth rotates on an imaginary line called an ____.

Axis

500

The moon is barely visible during the _____ phase. 

New

500
Pluto is called a ________ ___________.

Dwarf Planet

500

A _______ is an object made of ice and dust.

Comet
500

A meteoroid that enters the Earth's atmosphere but has not struck the Earth is called a ________.

Meteor

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