Science 8th Grade

Front

What word is used to describe one object moving around another object?

Back

Revolution

Front

What factors determine the strength of the force of gravity between two objects? Choose the two that apply: A. Distance between the objects. B. Sizes of the objects. C. Masses of the objects. D. Weights of the objects.

Back

Distance between the objects, Masses of the objects.

Front

Why does the sun shine more directly on Earth’s Northern Hemisphere during the summer months? A. The rotation of the sun makes temperatures warmer. B. The tilt of Earth's axis tips the Northern Hemisphere toward the sun. C. The gravitational pull toward the sun is stronger in August. D. Earth's orbit is nearest to the sun in the summer.

Back

The tilt of Earth's axis tips the Northern Hemisphere toward the sun.

Front

What is the force that keeps Earth in orbit around the sun and explains why astronauts appear to be weightless?

Back

Gravity

Front

Which theory about the location and movement of celestial objects is illustrated by the diagram?

Back

Geocentric Theory.

Front

How does Aristarchus’ view of the Solar System compare with Aristotle’s view?

Back

Aristarchus’ theory is heliocentric, and Aristotle’s theory is geocentric.

Front

According to Johannes Kepler's laws of planetary motion, how do planets move in the solar system? A. Circular orbits around Earth, B. Elliptical orbits around Earth, C. Circular orbits around the sun, D. Elliptical orbits around the sun

Back

Elliptical orbits around the sun

Front

What did Galileo conclude from his observations of Venus?

Back

It travels around the sun.

Front

Which phrase best describes the HELIOCENTRIC MODEL of the solar system? A. Moon-centered. B. Earth-centered C. Sun-centered D. Planet-centered

Back

Sun-centered

Front

Which of these tools enabled Galileo to study parts of the universe that had never been seen? A. Compass, B. Geometry, C. Mathematics, D. Telescope

Back

Telescope