Front

What are the primary colors?

Back

Red, yellow, blue.

Front

What is the largest organ of the human body?

Back

Skin.

Front

Which city in northern California has the most people?

Back

San Jose.

Front

What is the most massive river in the world?

Back

Amazon.

Front

Which US city has the most people?

Back

New York City.

Front

What is the second most populous city in the US?

Back

Los Angeles.

Front

What is the third most populous city in the US?

Back

Chicago.

Front

What colors can be created by mixing primary colors?

Back

Secondary colors such as green, orange, and purple.

Front

What is the function of skin in the human body?

Back

Protects internal organs, regulates temperature, and provides sensory information.

Front

What is the significance of the Amazon River?

Back

It is the river with the most water volume in the world.