unit 2

Question 1

ellipse

Answer 1

elongated circle

Question 2

aphelion (APART)

Answer 2

when earth is further away

Question 3

perihelion

Answer 3

when the earth is closer

Question 4

synchronized rotation

Answer 4

when something rotates at the same speed it revolves

Question 5

keplers 1st law

Answer 5

planet moves in an elliptical orbit around the sun

Question 6

keplers 2nd law

Answer 6

a planet moves fastest when it is close to the sun, slower when it is further away

Question 7

keplers 3rd law

Answer 7

as a planets get farther away from the sun, it takes longer to revolve

Question 8

nutation (TWO TES)

Answer 8

small wobble of earths tilt. caused by moon’ gravitational pull

Question 9

precession

Answer 9

slow wobble of earth’s axis. caused by pull of the sun, moon and the other planets

Question 10

barycenter

Answer 10

the point between two objects where they balance each other out

Question 11

spring tides

Answer 11

moon, earth and sun are in a straight line, super tides

Question 12

neap tides

Answer 12

the sun moon and earth are at a right angle, weaker tides

Question 13

waxing

Answer 13

getting bigger

Question 14

waning

Answer 14

getting smaller

Question 15

what is earth’s magnetic field caused by?

Answer 15

movements in the earth’s iron-nickel core (magnetic iron core)

Question 16

what does the magnetic field do?

Answer 16

repels solar winds, solar storms but when they come through it causes northern lights

Question 17

what are the different types of waves?

Answer 17

radio, microwavs, infared, visible, UV, x-rays gamma

Question 18

what are electromagnetic waves caused by?

Answer 18

fusion in the suns core

Question 19

longitude

Answer 19

run north and south. MEASURE EAST AND WEST. affects timezones

Question 20

latitude

Answer 20

run east and west, MEASURE NORTH AND SOUTH, affects climates

Question 21

international date line

Answer 21

180 west

Question 22

prime meridian

Answer 22

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