Chapter 1

Question 1

The average distance from the Earth to the Sun, 149,600,000 km can be written in shorthand notation as-

Answer 1

1.496 x 10 ^8 km

Question 2

There are 1000 mm in 1 m. This

means that a distance of 10mm is-

Answer 2

1 x 10 ^-2 m

Question 3

10^2 x 10^5 =

Answer 3

10,000,000

Question 4

100 (10 ^0) =

Answer 4

1

Question 5

10^-3 x 10^3 =

Answer 5

1

Question 6

(3 x 10^4)^4=

Answer 6

8.1 x 10^17

Question 7

(.5)^3 =

Answer 7

0.125

Question 8

(8.0 x 10^5) / (2 x 10^3) =

Answer 8

400

Question 9

The ecliptic can be defined as the-

Answer 9

Path traced out by the Sun in our sky over one year against the background stars.

Question 10

In which direction dies the Sun appear to move along the ecliptic over the course of a year, relative to the background stars?

Answer 10

East

Question 11

If we could see background stars in the daytime, the Sun would-

Answer 11

Appear to move eastward against them at a rate of 1• per day

Question 12

The earth would NOT have seasons if-

Answer 12

It’s axis of rotation were perpendicular to its orbital plane

Question 13

Why do we see different phases of the moon?

Answer 13

The illuminated half if the moon becomes more or less visible from earth as the moon orbits the earth

Question 14

The phase if the moon when the sun NAND moon have the same right ascension-

Answer 14

New moon

Question 15

Approximately when dies a full moon rise?

Answer 15

Sunset

Question 16

How often does the moon rotate to keep one face pointed toward the earth at all times?

Answer 16

Once per month

Question 17

The total in Ed if eclipses is limited to seven or fewer per year because one condition that must be met for a lunar or solar eclipse is that the-

Answer 17

Moon be close to or crossing the ecliptic plane.

Question 18

What is the approximate inclination if the moon’s orbit to the ecliptic plane?

Answer 18

5*

Question 19

A solar eclipse occurs in the earth when the

Answer 19

Moon casts a shadow in the earth

Question 20

A lunar eclipse does not occur at every full moon because the

Answer 20

Plane if the moon’s orbit I’d at an angle to the place of the earth’s orbit.

Question 21

A lunar eclipse is caused by the

Answer 21

Moon passing unto the shadow of the earth

Question 22

The difference between an umbral eclipse and a penumbras eclipse is

Answer 22

The distance of the moon above or below the ecliptic

Question 23

A total solar eclipse is visible (assuming clear skies everywhere) to

Answer 23

Only people in aping narrow path, much smaller than a hemisphere

Question 24

What is the major factor they governs whether a douse eclipse is a total rather than annular when viewed from the center of the eclipse path on earth?

Answer 24

Earth-moon distance

Question 25

A person standing in the moon’s penumbra will see a

Answer 25

Partial solar eclipse