Grade 7 Science Quiz: Solar System and Planetary Motion

What is the largest planet in our solar system?

• Saturn

• Venus

• Jupiter

• Mars

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What is the smallest planet in our solar system?

• Earth

• Mercury

• Jupiter

• Venus

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What causes the planets to orbit around the sun?

• Gravitational force and Inertia

• Planetary alignment

• Solar wind

• Magnetic force

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What is the shape of the Earth's orbit around the sun?

• Circular

• Square

• Elliptical

• Triangular

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How did the solar system form?

• From a collision of two black holes.

• From a giant cloud of gas and dust called a nebula.

• From a single massive explosion.

• From a series of volcanic eruptions.

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What is the first law of Kepler's laws of planetary motion?

• The orbit of a planet is a perfect circle with the Sun at the center.

• The orbit of a planet is a straight line from the planet to the Sun.

• The orbit of a planet is a spiral around the Sun.

• The orbit of a planet is an ellipse with the Sun at one of the two foci.

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What is the average distance from the Earth to the sun?

• 200 million miles

• 93 million miles (150 million kilometers)

• 75 million miles

• 500,000 miles

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What is the average distance from Mars to the sun?

• 142 million miles (228 million kilometers)

• 75 million miles (120 million kilometers)

• 300 million miles (482 million kilometers)

• 50 million miles (80 million kilometers)

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Two factors effecting the magnitude of the force of gravity between 2 objects are...

• mass and distance 
• mass and matter
• distance and weight 
• weight and mass

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This states that all objects attract each other through gravitational force.

• The law of conservation of mass
• Newton's second law of motion
• The law of universal gravitation
• The law of free falling objects

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