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Sceicne > Ch.21 > Flashcards

Ch.21 Flashcards

1
Q

Time it takes for an object to go around the sun

A

Revolution

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2
Q

One AU is the average distance from _____ to ______

A

Sun - Earth

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3
Q

Do inner planets have shorter or longer revolution

A

shorter

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4
Q

What is AU used to measure

A

Distance of objects in space

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5
Q

Object spins while it revolves around the sun

A

Rotation

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6
Q

Do the inner or outer planets have a slow rotation

A

Inner Planets

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7
Q

Know how to do light minute math

A

Go to planet and then back to earth

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8
Q

Diameter of the sun

A

1.4 million km

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9
Q

Sun is mostly

A

Hydrogen Gas

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10
Q

types of light the sun gives off

A

Infared
UV
Visible Light

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11
Q

Do planets have a high or low eccentricity

A

low

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12
Q

What numbers are eccentricity between

A

0-1

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13
Q

How do you find eccentricity

A

foci divided by diameter

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14
Q

Why does mercury have a great temp range

A

little to no atmosphere

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15
Q

Venus’s spin

A

retrograde spin *west to east

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16
Q

Why is venus considered the hottest planets

A

Has Greenhouse Effect

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17
Q

What is the main part of Venus’s Atmosphere

A

Carbon dioxide

18
Q

2 unique properties of Earth

A

water in all 3 phases, nitrogen rich

19
Q

Mars is red because of____

A

iron in its soil

20
Q

Mars surface features (3)

A

biggest volcanos “Olympic Mons”
Co2 Ice caps, surface is like a dried up river

21
Q

What is the composition of Jupiters and Saturns Atmosphere

A

Hydrogen and Helium

22
Q

What’s the red spot on Jupiter

A

Red atmospheric storm

23
Q

2 main features of saturn

A

rings
could float on water

24
Q

What gives Uranus a greenish glow

A

methane

25
Q

What is unique about Uranus’s spin

A

on its side

26
Q

How was Neptune predicted before it was found

A

irregularities in Uranus’s orbit

27
Q

What feature of Neptune’s is similar to Jupiter

A

blue atmospheric storm

28
Q

Classifications for a Dwarf Planet

A

Enough gravity to form a sphere
object with. similar mass orbiting/crossing its path

29
Q

the 4 dwarf planets

A

Eris, Makemake, Pluto, Cetes

30
Q

Comets are made of_____

A

rock, ice, dust

31
Q

Why does a comet have a tail

A

ice evaporates

32
Q

What is a comet tail also called

A

Coma?possibly iron tail

33
Q

Oval shaped orbit

A

Comet

34
Q

Where are comets located

A

Kuiper Belt and Oort Cloud

35
Q

What are asteroids from

A

left over planetary material of rock and ice

36
Q

Where are asteroids

A

Asteroid Belt
Between Mars and Jupiter

37
Q

Friction burns up meteoroid, causing a streak of light

A

Meteor

38
Q

Millions of Particles entering earth atmosphere

A

Meteoroid

39
Q

Most are the size of sands

A

Meteoroid

40
Q

Large enough to make it through atmosphere and strike the ground

A

Meteorite

Sceicne (11 decks)

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