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Solar System Flashcards

(20 cards)

1
Q

Was once a planet. Now called a dwarf planet.

A

Pluto

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2
Q

The 4th planet from the sun. Also called the “Red Planet.”

A

Mars

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3
Q

A large body of rock or gases that orbits the sun.

A

planet

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4
Q

The 1st planet in the solar system.

A

Mercury

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5
Q

Spinning like a top, responsible for the Earth having day and night.

A

Earth’s rotation

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6
Q

The farthest planet from the sun. Very dark and very cold.

A

Neptune

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7
Q

A line–which you cannot see–that runs through the center of Earth from the North Pole to the South Pole.

A

axis

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8
Q

The 3rd planet from the sun. (Our home)

A

Earth

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9
Q

Someone who travels in a spacecraft.

A

astronaut

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10
Q

The 2nd planet from the sun. Scientists think this planet may have had oceans, but it evaporated due to the sun’s heat.

A

Venus

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11
Q

The movement of Earth once around the Sun, also called an orbit. The reason we have seasons. It takes 365 days to complete.

A

Earth’s revolution

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12
Q

Is the star at the center of the Solar System.

A

Sun

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13
Q

The 5th planet from the sun. Also the largest of the lanets.

A

Jupiter

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14
Q

6th planet from the Sun and the second largest planet in the Solar System, after Jupiter.

A

Saturn

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15
Q

The sun, the planets, and the other objects that orbit the sun.

A

solar system

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16
Q

A group of stars that appear to form a picture.

A

constellation

17
Q

Areas of darkness caused by an object in the direct path of the sun. This changes as the sun appears to move through the sky each day.

18
Q

7th planet from the sun.

19
Q

Stages of the moon’s cycle.

20
Q

The only natural satellite of the Earth.