ORBITS
TIDES
EARTH LAYERS
ASTEROIDS
WATER CYCLE
100

This is the path of an object around another object in space.

ORBIT

100

How many high tides are there each day?

2

100

The layers of Earth are called:

Crust, Mantle, Outer Core, Inner Core

100

What are the two different groups of planets?

Rocky Planets and Gas Giants

100

Fresh water is _________ of years old.

Millions

200

The moon orbits Earth in this many days.

about 27

200

These tides occur every 24 hours.

Diurnal Tides

200

The center of Earth is ___________ degrees Fharenheit.

9,000-12,000

200

What separates the Rocky Planets and the Gas Giants?

Asteroid Belt

200

This is a series of flows of water between various water stores.

The Water Cycle

300

This man thought of gravity once an apple hit his head.

Sir Isaac Newton
300

These three objects cause the tides on Earth.

Sun, moon, and Earth
300

These two metals make up the outer core.

Iron and Nickel

300

What are comets made of?

ice, rocks, and dust
300

Icebergs and glaciers hold _____ of all the freshwater in the world.

2/3

400

This is a group of stars, gas, and dust bound together by gravity.

Galaxy

400

The moon exerts _____ times more energy on the tides than the sun.

2.2

400

This creates Earth's magnetic field.

The Outer Core

400

A small body of matter from outer space that enters Earth's atmosphere appearing as a streak of light.

Meteor

400

Explain evaporation.

It is when water turns into gas through heat.

500

This is the strongest force in all the universe.

Black Hole

500

Low tides are located ______ from the moon.

90 degrees

500

The mantle is ________ miles thick of puddy like ______ and ___________.

1,800 - iron - magnesium

500

The asteroid ______ is so large that it has its own moon named ________.

Ida - Dactyl

500
What percentage of the water on Earth do the oceans hold?

70%