Astronomy and Earths Motion

Question 1

Keplers 1st law

Answer 1

The path of a satellite around a primary is an ellipse, with the primary located at a focus point of the ellipse

Question 2

Keplers 2nd law

Answer 2

Satellites sweep out equal areas in equal times

Question 3

Keplers 3rd law

Answer 3

Orbital velocity changes, its faster when closer and slower when farther

Question 4

Aphelion is _______ , perihelion is _______

Answer 4

farther, closet

Question 5

High eccentricity means

Answer 5

more oval and big change in orbital velocity

Question 6

Low eccentricity means

Answer 6

more circular and small change in orbital velocity

Question 7

eccentricity formula

Answer 7

e = d (distance between focus pts)/ L (length of major axis)

Question 8

gravity

Answer 8

force of attraction between any 2 objects

Question 9

More mass, ____

Answer 9

stronger gravity

Question 10

Farther =

Answer 10

weaker gravity
ex. 2x farther -> 4x weaker

Question 11

Inverse square law

Answer 11

ex. 3x closer -> 3² -> 9

Question 12

Earth ROTATES…

Answer 12

15 degrees/hour

Question 13

Earth REVOLUTIONS…

Answer 13

~1 degree/day

Question 14

Jovian plants are

Answer 14

larger, have longer periods of revolution, and are low density

Question 15

Terrestrial planets are

Answer 15

smaller, shorter periods of revolution, and are high density

Question 16

Foucault’s pendulum

Answer 16

the swing of a pendulum appears to change direction (15 degrees hr) as earth rotates underneath it

Question 17

The Coriolis affect

Answer 17

moving objects (wind, ocean, currents, cannon balls, etc) bend as earth rotates

Question 18

Northern hemisphere bends ___, southern hemisphere bends ____

Answer 18

right, left