29.1 chapter

Question 1

what are two things that effect gravitational forces?

Answer 1

the one with the bigger mass if the same distance the one closer have a greater gravitational force

Question 2

which diameter of the Earth is longer poll to poll or the equator?

Answer 2

the equator

Question 3

what does the magnetic do for earth?

Answer 3

protects us from harmful radiation from the sun

Question 4

which magnetic pole is in the northern hemisphere?

Answer 4

the south magnetic pole

Question 5

which magnetic pole is in the southern hemisphere?

Answer 5

the north magnetic poles

Question 6

can the magnetic poles flip?

Answer 6

yes

Question 7

what degrees is earths axis is earth tilted at?

Answer 7

11.7 degrees

Question 8

what is the flipping of the southern and northern magnetic pole called?

Answer 8

magnetic reversal

Question 9

how often do magnetic reversals occur?

Answer 9

200,000 years

Question 10

when was the last one that happened?

Answer 10

780,000 years ago

Question 11

what is a magnetosphere?

Answer 11

deflects harmful radiation from the sun

Question 12

how are the auroras created?

Answer 12

electrically- charged particles collide with atoms in the atmosphere

Question 13

what is the scientific name for the northern lights?

Answer 13

aurora borealis

Question 14

what is the scientific name for the southern lights?

Answer 14

aurora australius

Question 15

when is earth closest to the sun?

Answer 15

early January (147 million km)

Question 16

when is earth farthest from the sun?

Answer 16

early July (152 million km)