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Science Grade 9 > Astronomy > Flashcards

Astronomy Flashcards

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1
Q

Comets often have a ____?

A

Tail

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2
Q

What are comets made of

A

Dust, rock, frozen water, gas

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3
Q

What kind of orbit do comets move in

A

Elliptical

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4
Q

What is a space rock called while it is in orbit still

A

Meteroid

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5
Q

What is a space rock called when it is in Earth’s atmosphere

A

Meteor

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6
Q

What is a space rock called when it hits earth

A

Meteorite

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7
Q

Why are asteroids not planets

A

Because they are too small, and not enough gravitational pull to clear the area.

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8
Q

Where is the asteroid belt located

A

Mars and Jupiter

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9
Q

Name 2 asteroids

A

1 Ceres and Mathilde

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10
Q

What is a meteor shower

A

a celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky.

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11
Q

What’s a meteor

A

a small body of matter from outer space that enters the earth’s atmosphere (space rock)

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12
Q

What’s an asteroid

A

asteroid is a minor planet–an object that is neither a planet nor a comet–that orbits within the inner Solar System.

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13
Q

What’s a comet

A

Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ices.

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14
Q

What are the 3 types of galaxy shapes

A

Elliptical, Spiral, Irregular

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15
Q

How many arms are spiral galaxy made of

A

2

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16
Q

What is our home galaxy called

A

Milky Way Galaxy

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17
Q

What is our neighboring galaxy

A

The Andromeda Galaxy

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18
Q

What is our neighboring star

A

Alpha Centauri

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19
Q

At the center of every spiral galaxy is a ________

A

Black Hole

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20
Q

What is a nebula

A

A huge cloud of dust and gas, within galaxies

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21
Q

What are galaxies held together by

A

Gravity

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22
Q

Name 2 meteor showers

A

Perseids and Lyrids (or Eta Aquarids)

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23
Q

Name 2 comets

A

Halley’s Comet, Hale Bopp

24
Q

What is a satellite

A

Something that orbits around a planet

25
Q

How many planets have satellites

A

6/8

26
Q

Name 2 satellites

A

Moons, Sputnik 1, Explorer 1, the ISS

27
Q

Which planet has the most moons

A

Jupiter or Saturn??

28
Q

Which planets have no moons

A

Mercury ans Venus

29
Q

Which planet is names after the God of agriculture

A

Saturn

30
Q

Name 3 things satellites are used for

A

Mapping, weather detection, TV, telephone

31
Q

What’s the avg speed the ISS orbits around Earth

A

27,700 km/h

32
Q

What is astronomy

A

It is the study of the universe and everything within it

33
Q

What’s the altitude that space begins

A

The Kármán Line

34
Q

Where is the Kármán line located

A

100 km above ground level

35
Q

TroStMeThEx is?

A

The order of the atmosphere bottom to top, excluding ground level

36
Q

List the atmosphere bottom to top (TroStMeThEx)

A

Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere

37
Q

Which atmosphere is the Kármán Line?

A

Thermosphere

38
Q

Which atmosphere do you find meteors

A

Mesophere

39
Q

How high up is the troposphere

A

6-20km

40
Q

How high up is the stratosphere

A

50km

41
Q

How high up is the mesophere

A

85 km

42
Q

How high up is the thermosphere

A

690 km

43
Q

How high up is the exosphere

A

10,000 km

44
Q

Where do most visible objects float around (hot air balloons, airplanes)

A

Right between ground level and the troposphere

45
Q

What is a constellation

A

A group of stars that form a recognizable pattern

46
Q

What are the views of the universe

A

Geocentric (earth, old) and Heliocentric (sun, current)

47
Q

What is it called when Earth catches up to a planet making it look like the observed planet is going backwards?

A

Retrograde motion

48
Q

Who made the heliocentric universe model

A

Nicholas Copernicus

49
Q

Who made the geocentric universe model

A

Ptolemy

50
Q

What is the solar system

A

A collection of sun, planets, satellites, comets, asteroids, meteors, and space debris

51
Q

Fastest moving planet?

A

Mercury

52
Q

Uranus rotates on its

A

Side!

53
Q

The largest planet?

A

Jupiter

54
Q

The hottest planet

A

Venus

55
Q

How many rings does Saturn have

A

7

56
Q

Why is Neptune blue

A

Because of the high concentration of methane gas

Science Grade 9 (6 decks)

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