Chapter 25: Our Solar System Flashcards

1
Q

Older than rocks on the Earth

A

Lunar rocks

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2
Q

A rock found mainly on the moon’s planes

A

Basalt

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3
Q

What moon rock is composed mostly of the mineral feldspar?

A

Anorthosite

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4
Q

Abundant on the moon, rare on the Earth

A

Natural glass

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5
Q

Pyroxferroite, armalcolite, tranquillityite

A

3 new discovered moon minerals not found on Earth

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6
Q

Mineral which makes up the highlands of the Moon

A

Anorthosite

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7
Q

Means starlike

A

Asteroids

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8
Q

First asteroid discovered (1 Jan 1801 by Giuseppe Piazzi)

A

Ceres

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9
Q

Small, irregular shaped body composed of water, ice, rock, and frozen gases

A

Comet

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10
Q

Refers to the space within galaxies

A

Intragalactic space

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11
Q

Unstable stars; their action makes them appear to be winking

A

Nova

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12
Q

Exploding star

A

Supernova

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13
Q

Flashes electromagnetic emissions

A

Pulsar

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14
Q

The ultimate star, which cannot radiate anything

A

Black hole

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15
Q

Clouds of matter not yet stars

A

Nebulae

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16
Q

A spiral-shaped galaxy of which the Earth is a part

A

The Milky Way

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17
Q

How many days does it take the moon to orbit the earth?

18
Q

Since the Moon is less massive than the earth, its gravitational pull is

A

only one-sixth that of earth’s.

19
Q

Day and night on the moon can have a difference of __°F

20
Q

From the earth we always see ________ of the moon.

A

The same side

21
Q

Long, irregular depressions on the moon

22
Q

The Martian day is _____ to a day on earth

23
Q

The reddish areas on Mars were thought to be

24
Q

Mariner 4 took the first ________ of another planet

25
Saturn's rings contain mostly
Rock and ice
26
The exact number of Saturn's moons is
Experts are still unsure
27
The orbits of most comets are a. Eccentric b. Circular c. Consistent d. None of these
a. Eccentric
28
Comets have been observed a. Since 1910 b. Only recently c. Since ancient times d. In the last 200 years
c. Since ancient times
29
The comet's tail forms as it nears a. The sun b. The moon c. The earth d. Uranus
a. The sun
30
Vikings 1 and 2 consisted of orbiters and landers.
TRUE
31
The existence of water was found in liquid form on Mars
FALSE
32
The highest content of surface material on Mars is silicon and iron
TRUE
33
Iron provides the red color of the Martian landscape
TRUE - book says false, though "This color is due to the rock and dust covering the surface of Mars. It has been analyzed and found to have a high iron content, so it has a rusty look." (Iron oxide in regolith)
34
By virtue of its size, Jupiter makes up ___ times the mass of all the other planets put together.
3 x
35
Due to its size, Jupiter rotates very slowly.
FALSE (Very quickly, about every 10 hours)
36
Of all the planets, Jupiter has the most intense radiation belts.
TRUE
37
How many rings encircle Uranus?
11 known rings
38
Neptune and Uranus are very similar
TRUE
39
In 2004, two rovers landed on Mars; their names are *Spirit* and *Opportunity*
TRUE (formerly MER-A & MER-B)
40
Some scientists have reclassified Pluto as a dwarf planet
TRUE
41
The Kuiper Belt is a ring of celestial bodies that extends billions of miles beyond the orbit of Neptune.
TRUE