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Science > Chapter 12: Solar System > Flashcards

Chapter 12: Solar System Flashcards

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1
Q

What is the formula to find A.U.?

A

1 A.U.=1.5 x 10⁸ km

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2
Q

What is the formula to find Light Years?

A

9.5 x 10^12 km

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3
Q

State all planets in the solar system in order, from near the Sun the furthurst

A
  1. Mercury
  2. Venus
  3. Earth
  4. Mars
  5. Jupiter
  6. Saturn
  7. Uranus
  8. Neptune
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4
Q

State the characteristics of Mercury (3)

A
  • closest planet to the sun
  • smallest planet
  • doesn’t have light
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5
Q

State the characteristics of Venus (4)

A
  • high content of carbon dioxide in its atmosphere
  • rotates from east to west
  • size and age is same as earth
  • very hot
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6
Q

State the characteristics of earth(3)

A
  • only place that is inhabited by living things
  • has atmosphere which protects the surface from solar wind, harmful ultraviolet rays and radiation
  • 71% water, 29% land
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7
Q

State the characteristics of mars (4)

A
  • known as ‘red planet’
  • 2 moons, Phobos and Demos
  • surface area that’s only 25% of earth’s and 10% of earth’s mass
  • 2 different areas, brighter and the poles
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8
Q

State the characteristics of Jupiter (3)

A
  • largest planet
  • mass is 320 more times of earth
  • deflect huge objects from hitting earth with it’s strong gravity (therefore being called protector of earth)
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9
Q

State the characteristics of saturn (3)

A
  • giant gas planet
  • has ring system, compromised with a small amount of rocky material and dust
  • 62 moons
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10
Q

State the characteristics of uranus(7)

A
  • first elements in the interior are ice and rock
  • third biggest planet
  • giant gas planet
  • has ring system but thinner and darker
  • many moons
  • axis of rotation is tilted
  • 84 years to orbit the sun
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11
Q

State the characteristics of neptune (3)

A
  • giant gas planet
  • 165 years to orbit
  • furthust planet from sun
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12
Q

Why is mercury cooler than venus when its nearer to the sun?

A

it cant trap heat cause it doesnt have an atmosphere

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13
Q

Which are the planets that has atmosphere?

A

earth
venus
mars

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14
Q

What does the gravity on the surface of planet depends on?

A

mass and density

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15
Q

What is the gravity of earth?

A

9.8ms-2

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16
Q

Why is the gravity of mercury and mars lower than earth?

A

their mass are lower

17
Q

Which planet has almost the same gravity as earth?

A

venus

18
Q

Why is gravity of jupiter much higher than earth?

A

bc its mass is extremely high

19
Q

Does giant gas planets have low density?

A

yea

20
Q

What is the the distance from sun to earth?

A

149.6 million km

21
Q

What is the relationship between distance and time?

A

The furthur the planet is from the Sun, the more time needed to orbit the sun

22
Q

What is the rotational direction of planets?

A

west to east, except venus which is east to west

23
Q

What would happen if the earth stops rotating?

A
  • longer day and night
  • more desert areas
  • change in high and low tides
  • temperature will drop
24
Q

What are natural satellites?

A

Natural satellits are objects that move around planets on their own orbit

25
Q

What are/is the natural satellit of earth?

A

only the moon is

26
Q

How long does it take for the moon to orbit around the earth?

A

27 days

27
Q

What happens due to the time range for moon to rotate on its orbit?

A

same surface of the moon will be facing the earth at all times

28
Q

Why is earth the only planet that has life?

A

WOGSTA 围殴干死他 (have live only can kill XD)

has. .
- water
- oxygen content
- gravity
- sunlight
- suitable temperature range
- atmosphere

29
Q

What is ecological footprints?

A

measure of the ability of water and land to provide the basic needs of humans

30
Q

What areas are in the ratio measurement in ecological footprints?

A
  • carbon dioxide
  • waste treatment areas
  • construction areas
  • forests
  • argricultural areas
  • farming areas
  • fishing areas
31
Q

How is the earth’s condition viewed from the moon?

A

The Earth appears to have phases like the moon view from the Earth

Science (13 decks)

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