Unit 6 Test Review(8th Grade)

Which model of the solar system places the Sun at the center, with planets orbiting around it?

• Geocentric Model

• Heliocentric Model

• Ptolemaic Model

• Aristotelian Model

Explain how the heliocentric model changed our understanding of the solar system compared to the geocentric model.

• It introduced the concept of elliptical orbits.

• It placed the Earth at the center of the universe.

• It showed that planets orbit the Sun, not the Earth.

• It suggested that the universe is infinite.

Tags

NGSS.MS-ESS1-2

Describe the role of gravity in the heliocentric model of the solar system.

• Gravity keeps the planets in fixed positions.

• Gravity causes the planets to orbit the Sun.

• Gravity has no effect on planetary motion.

• Gravity only affects the Earth's moon.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which of the following best describes inertia?

• The tendency of an object to change its state of motion.

• The force that pulls objects toward the Earth.

• The resistance of any physical object to any change in its velocity.

• The acceleration of an object due to gravity.

How does inertia affect the motion of planets in the solar system?

• It causes planets to stop moving.

• It keeps planets moving in a straight line unless acted upon by another force.

• It makes planets move in circular orbits.

• It has no effect on planetary motion.

Identify the inner planets of our solar system.

• Jupiter, Saturn, Uranus, Neptune

• Mercury, Venus, Earth, Mars

• Earth, Mars, Jupiter, Saturn

• Venus, Earth, Jupiter, Neptune

Compare the characteristics of inner planets to outer planets.

• Inner planets are larger and have more moons.

• Inner planets are smaller, rocky, and have fewer moons.

• Outer planets are smaller and have no rings.

• Outer planets are rocky and have no atmospheres.

Tags

NGSS.MS-ESS1-3

Which of the following statements is true about the geocentric model?

• It accurately describes the motion of planets.

• It places the Earth at the center of the universe.

• It was proposed by Copernicus.

• It is the currently accepted model of the solar system.

What evidence supports the heliocentric model over the geocentric model?

• The retrograde motion of planets is more easily explained.

• The phases of Venus can be observed.

• The apparent size of planets changes as they orbit.

• All of the above.

Which of the following is an effect of gravity on Earth?

• It causes the Earth to rotate on its axis.

• It keeps the atmosphere attached to the Earth.

• It has no effect on tides.

• It only affects objects in space.

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS2-4