Mastering Astronomy study test 1 part 3 Flashcards Preview

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Flashcards in Mastering Astronomy study test 1 part 3 Deck (72)
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1

____ is about 30 times as far from the Sun as our own Planet.

Neptune

2

___ is the planet with the highest average surface temperature.

Venus

3

The planet with the lowest average density is

Saturn

4

The planet that orbits closet to the sun is

Mercury

5

The only rocky planet to have more than one moon is

Mars

6

___ is the jovian planet that orbits closet to the Sun.

Jupiter

7

___ has a rotational axis that is tilted so much it lies nearly in the plane of its orbit.

Uranus

8

Most of the surface of ____ is covered with liquid water

Earth

9

Planets orbital time

Mercury - 87.97 days, Venus, 224.7 days, earth 365.26 days, Mars, 686.98 days, Jupiter 4,332..82 days, Saturn 10,755.7 days, Uranus 30,687.15 days, Neptune 60,190.3 days Pluto, 90,553 days

10

How much of the celestial sphere is visible for an observer at 0 degrees south at any one instance?

50%

11

Approximately how much of the celestial sphere is visible for an observer at 60 degrees north over the course of one 360 rotation of the earth?

60%

12

Temperatures of planets from hottest to coolest

Sun venus mercury moon earth mars jupiter saturn uranus neptune pluto

13

Earth has two tidal bulges at all times. Approximately where are these bulges located?

One faces the moon and one faces opposite the moon.

14

Do tides also affect land?

yes, though land rises and falls by a much smaller amount than the oceans.

15

Any particular location on Earth experiences.

Two high tides and two low tides each day

16

One tidal bulge faces toward the Moon because that is where the gravitational attraction between earth and moon is strongest. Which of the following best explains why there is also a second tidal bulge?

the second tidal bulge arises because gravity weakens with distance essentially stretching earth along the earth-moon line

17

Moon phase and orbital position relative to sun, tides

Low tides are lowest at both full moon and new moon, high tides are highest at both full moon and new moons.

18

Why does the moon play a greater role in causing tides than the Sun?

Because the gravitational attraction between earth and moon varies more across earth than does the gravitational attraction between earth and sun.

19

A solar eclipse that occurs when the new moon is too far from earth to completely cover the sun can be either a partial solar eclipse or a

Annular eclipse

20

Anyone looking from the night side of earth can, in principle see a

total lunar eclipse

21

During some lunar eclipses the moons appearance changes only slightly because it passes only through the part of earths shadow called the

penumbra

22

An ____ can occur only when the moon is new and has an angular size larger than the sun in the sky

Total solar eclipse

23

A partial lunar eclipse begins when the moon first touches earths

Umbra

24

A point at which the moon crosses earths orbital plane is called an

node

25

Suppose you are in an elevator, as the elevator starts upward its speed will increase. During this time when the elevator is moving upward with increasing speed, your will be.

greater than your normal weight at rest

26

Suppose you are in an elevator that is moving upward, as the elevator nears the floor at which you will get off, its speed slows down during this time when the elevator is moving upward with decreasing speed your weight will be

less than your normal weight at rest

27

For what other motion would your weight also be greater than your normal weight?

The elevator moves downward while slowing in speed

28

If you are standing on a scale in an elevator, what exactly does the scale measure

the force you exert on the scale

29

If we have a new moon today, when we will have the next full moon?

In about 2 weeks.

30

We cannot see a new moon in our sky because _________.

a new moon is quite near the Sun in the sky