Exploring Our Solar System

What is the primary component of the Sun?

• Hydrogen

• Oxygen

• Carbon

• Helium

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TEKS.SCI.7.9A

Which planet is known as the "Red Planet"?

• Venus

• Mars

• Jupiter

• Saturn

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TEKS.SCI.7.9A

What is the role of gravity in the motion of planets around the Sun?

• It pushes planets away from the Sun.

• It keeps planets in orbit around the Sun.

• It has no effect on planetary motion.

• It causes planets to spin on their axes.

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TEKS.SCI.7.9B

Which of the following best describes the Kuiper Belt?

• A region of space with many comets and asteroids beyond Neptune.

• A ring of dust and gas around Saturn.

• A cloud of gas surrounding the Sun.

• A group of stars forming a constellation.

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TEKS.SCI.7.9A

How does the presence of water contribute to Earth's ability to support life?

• It provides a medium for chemical reactions.

• It reflects sunlight away from Earth.

• It absorbs harmful solar radiation.

• It prevents the formation of clouds.

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TEKS.SCI.7.9C

Explain why the Oort Cloud is important in understanding the solar system.

• It is the source of long-period comets.

• It contains the largest planets.

• It is where stars are born.

• It is the closest region to the Sun.

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TEKS.SCI.7.9A

Which factor is most crucial for maintaining Earth's atmosphere?

• The presence of the Moon

• Earth's magnetic field

• The distance from the Sun

• The rotation speed of Earth

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TEKS.SCI.7.9C

Analyze how the proximity of the Sun affects Earth's climate.

• It causes extreme temperature fluctuations.

• It provides a stable climate suitable for life.

• It results in constant volcanic activity.

• It leads to frequent ice ages.

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TEKS.SCI.7.9C

What is the main reason asteroids do not form a planet in the asteroid belt?

• The gravitational influence of Jupiter

• The lack of sufficient material

• The presence of the Sun's solar wind

• The high speed of asteroids

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TEKS.SCI.7.9A

Describe how the composition of Earth's atmosphere supports life.

• It contains a high percentage of carbon dioxide.

• It is mostly composed of nitrogen and oxygen.

• It is primarily made of hydrogen and helium.

• It has a thick layer of sulfur dioxide.

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TEKS.SCI.7.9C