Chapter 29.1

Question 1

A sphere is a round, three-dimensional object.

Answer 1

Sphere

Question 2

An elongated, closed curve with two foci.

Answer 2

Ellipse

Question 3

What are some facts to proof that Earth is a sphere?

Answer 3

Objects fall straight towards the surface, the shadow on the moon, people all over the world see different stars.

Question 4

What are 2 factors that affect gravity´s pull?

Answer 4

Mass and distance

Question 5

Which diameter is

Answer 5

Equator

Question 6

What does the magnetic field protect Earth from?

Answer 6

harmful radiation from the sun

Question 7

Which magnetic pull is located in the northern pole?

Answer 7

south magnetic pole

Question 8

Which magnetic pole is located in the northern pole

Answer 8

north magnetic pole

Question 9

At what degrees is Earth tilted at?

Answer 9

11.7

Question 10

Can magnetic poles flip-flop?

Answer 10

slowly over time

Question 11

What is large scale movements called when the magnetic poles flip?

Answer 11

magnetic reversals

Question 12

When was the last reversal?

Answer 12

200,000 years ago

Question 13

What deflects harmful radiation from the sun?

Answer 13

the magnetosphere

Question 14

What is the name of the northern lights and the southern lights?

Answer 14

northern lights- Aurora Borealis

southern lights- Aurora Australis

Question 15

How are the Auroras created?

Answer 15

electrically-charged particles collide with atoms in the atmosphere and emit light

Question 16

When is Earth closer to the sun?

Answer 16

January

Question 17

When is Earth farther from the sun?

Answer 17

July

Question 18

An area 15 degree wide in which the time is the same.

Answer 18

Time Zone

Question 19

The spinning of Earth on its axis.

Answer 19

Rotation

Question 20

The motion of Earth in an elliptical orbit around the sun.

Answer 20

Revolution

Question 21

Is defined as the plane of Earth´s orbit around the Sun.

Answer 21

Ecliptic

Question 22

Occurs when Earth´s rotational axis is tilted directly toward the Sun or away from the Sun.

Answer 22

Solstice

Question 23

Earth´s rotational axis is perpendicular to a line drawn from the center of Earth to the center of the Sun.

Answer 23

Equinox