8th Grade Science Benchmark Review

Front

What is the largest object in the solar system?

Back

The Sun is the largest object in the solar system, significantly larger than any of the planets.

Front

What are the two types of signals used to transmit information?

Back

Analog signals and digital signals.

Front

What is the main process by which plants produce oxygen?

Back

Photosynthesis is the process by which plants produce oxygen.

Front

What force keeps planets in orbit around the sun?

Back

Gravity is the force that keeps planets in orbit around the sun.

Front

What is the difference between analog and digital signals?

Back

Analog signals are continuous, while digital signals have discrete states (0 and 1).

Front

What happens to oxygen levels when a large forest is cut down?

Back

Oxygen levels in the air decrease when a large forest is cut down.

Front

What is a gene?

Back

A gene is a segment of DNA that determines a specific trait in an organism.

Front

What is the role of gravity in the solar system?

Back

Gravity holds celestial bodies in orbit around one another, such as planets around the sun.

Front

What is the outcome of different gene combinations in offspring?

Back

Different gene combinations can result in varying traits, such as fur color in mice.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to synthesize foods with the help of chlorophyll.