Chapter 2

Question 0

Star that is 109 times wider than the earth

Answer 0

Sun

Question 1

The sun and all objects in that revolve around it

Answer 1

Solar system

Question 2

_____________ of the sun is created by its mass and keeps its objects revolving around it

Answer 2

Gravitational pull

Question 3

All planets except ___ are grouped into two types

Answer 3

Pluto

Question 4

Solid, rocky crusts; Mercury, Venus, earth, Mars

Answer 4

Terrestrial

Question 5

more gaseous and less dense; Jupiter, Saturn, Uranus, Neptune

Answer 5

gas giant planets

Question 6

ball of ice and rock

Answer 6

Pluto

Question 7

small planet-like objects; found mainly between Mars and Jupiter

Answer 7

asteroids

Question 8

bodies of dust and frozen gases

Answer 8

comets

Question 9

space debris; pieces of rock and iron

Answer 9

meteoroids

Question 10

how far is earth from the sun?

Answer 10

93 million miles

Question 11

earth’s diameter is _____ miles at the equator, and ___ at the poles

Answer 11

7,930 - shorter

Question 12

the circumference of earth is ____

Answer 12

24,000 miles

Question 13

how much of earth’s surface is water

Answer 13

70%

Question 14

oceans and other bodies of water

Answer 14

hydrosphere

Question 15

earth’s crust; land above and below the ocean

Answer 15

lithosphere

Question 16

part of the earth that supports life

Answer 16

biosphere

Question 17

air that we breathe

Answer 17

atmosphere

Question 18

the atmosphere is made up of ___ nitrogen

Answer 18

78%

Question 19

the atmosphere is made up of ___ oxygen

Answer 19

21%

Question 20

the atmosphere is made up of __ argon and other gases

Answer 20

1%

Question 21

the atmosphere extends about ___ miles above earth’s surface

Answer 21

6,000

Question 22

natural features of earth’s land

Answer 22

landforms

Question 23

four major types of landforms can be be described by their ___ and ____

Answer 23

shapes - elevation

Question 24

what are the four major types of landforms

Answer 24

mountains, hills, plateaus, plains

Question 25

what two continents stand alone?

Answer 25

Australia - Antarctica

Question 26

what continents are connected?

Answer 26

Asia, Europe, Africa,

North America and South America

Question 27

part of a continent that extends underwater

Answer 27

continental shelf

Question 28

the continental shelf can extend out to __ miles and be about ___ feet deep

Answer 28

800 - 600

Question 29

what is the highest peak on earth?

Answer 29

Mount Everest

Question 30

what is the lowest point on earth

Answer 30

shore of the Dead Sea

Question 31

what is the deepest part on earth?

Answer 31

Marianna’s trench