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23 terms

Geography lesson 14 The earth in space

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solar system
sun, planets, and all the other objects that revolve around the sun
orbit
path a planet takes as it revolves around the Sun.
atmosphere
the layer of air that surrounds the earth
axis
an imaginary line that passes through Earth's center and its North and South Poles
revolution
a planets elliptical orbit around the Sun.
leap year
year that has an extra day; occurs every fourth year
summer solstice
Occurs when the Sun is directly overhead at 23.5° north latitude (the tropic of cancer), around June 21, and results in the maximum number of daylight hours for the northern hemisphere and the minimum number for the southern hemisphere.
winter solstice
Occurs when the Sun is directly overhead at 23.5° south latitude (Tropic of Capricorn), around December 21, and results in the minimum number of daylight hours for the northern hemisphere and the maximum number for the southern hemisphere.
equinox
twice-yearly time each spring and fall-when the Sun is directly over the equator and the number of daylight and nighttime hours are equal worldwide
3 facts about the sun
gives off heat
planets and other space bodies revolve around it
93 million miles away from Earth
Made of boiling gas
3 ways the sun contribute to life on earth
heat
light
Between what 2 planets is Earth's orbit
Venus and Mars
How does Earth's orbit affect you
changes the seasons
How does Earth's tilt cause changes in the seasons
When the Sun is directly over the Tropic of cancer, it is summer in the northern hemisphere, but winter in the southern hemisphere
Which seasons begin on the two equinoxes
spring
autumn
What bodies make up the solar system
sun, Earth, 8 other planets and thousands of smaller space bodies
List two gases that are found in the atmosphere
nitrogen and oxygen
What two motions does Earth make in space
rotates on it axis
revolving around the Sun
How does the position of Earth determine whether a day is one of the solstice or equinox days
Slanting inwards towards the sun or outwards away from the sun
List the effects of Earth's rotation on human, plant, and animal life
limits the growing season for plants
Humans must adapt to colder or warmer weather
Animals adapt to changing availablity of food
What would happen to human, plants and animals if the Earth stopped rotating
One side of the world would never see sun and everything would move away from there or die.
When the sun's direct rays hit the Tropic of Capricorn, what season is it in the Northern Hemisphere
winter
What is unusual about Pluto's orbit
It crosses the orbit of another planet (Neptune)