Chapter 12: Solar System Flashcards
What is the formula to find A.U.?
1 A.U.=1.5 x 10⁸ km
What is the formula to find Light Years?
9.5 x 10^12 km
State all planets in the solar system in order, from near the Sun the furthurst
- Mercury
- Venus
- Earth
- Mars
- Jupiter
- Saturn
- Uranus
- Neptune
State the characteristics of Mercury (3)
- closest planet to the sun
- smallest planet
- doesn’t have light
State the characteristics of Venus (4)
- high content of carbon dioxide in its atmosphere
- rotates from east to west
- size and age is same as earth
- very hot
State the characteristics of earth(3)
- 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
State the characteristics of mars (4)
- 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
State the characteristics of Jupiter (3)
- 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)
State the characteristics of saturn (3)
- giant gas planet
- has ring system, compromised with a small amount of rocky material and dust
- 62 moons
State the characteristics of uranus(7)
- 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
State the characteristics of neptune (3)
- giant gas planet
- 165 years to orbit
- furthust planet from sun
Why is mercury cooler than venus when its nearer to the sun?
it cant trap heat cause it doesnt have an atmosphere
Which are the planets that has atmosphere?
earth
venus
mars
What does the gravity on the surface of planet depends on?
mass and density
What is the gravity of earth?
9.8ms-2
Why is the gravity of mercury and mars lower than earth?
their mass are lower
Which planet has almost the same gravity as earth?
venus
Why is gravity of jupiter much higher than earth?
bc its mass is extremely high
Does giant gas planets have low density?
yea
What is the the distance from sun to earth?
149.6 million km
What is the relationship between distance and time?
The furthur the planet is from the Sun, the more time needed to orbit the sun
What is the rotational direction of planets?
west to east, except venus which is east to west
What would happen if the earth stops rotating?
- longer day and night
- more desert areas
- change in high and low tides
- temperature will drop
What are natural satellites?
Natural satellits are objects that move around planets on their own orbit
What are/is the natural satellit of earth?
only the moon is
How long does it take for the moon to orbit around the earth?
27 days
What happens due to the time range for moon to rotate on its orbit?
same surface of the moon will be facing the earth at all times
Why is earth the only planet that has life?
WOGSTA 围殴干死他 (have live only can kill XD)
has. .
- water
- oxygen content
- gravity
- sunlight
- suitable temperature range
- atmosphere
What is ecological footprints?
measure of the ability of water and land to provide the basic needs of humans
What areas are in the ratio measurement in ecological footprints?
- carbon dioxide
- waste treatment areas
- construction areas
- forests
- argricultural areas
- farming areas
- fishing areas
How is the earth’s condition viewed from the moon?
The Earth appears to have phases like the moon view from the Earth
