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solar system

sun, planets, and all the other objects that revolve around the sun


path a planet takes as it revolves around the Sun.


the layer of air that surrounds the earth


an imaginary line that passes through Earth's center and its North and South Poles


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.


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


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


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


What is unusual about Pluto's orbit

It crosses the orbit of another planet (Neptune)

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