8th Grade Science Fall Semester Exam Review

Front

What is the name of the ancient supercontinent formed 28 million years ago?

Back

Pangea

Front

According to the law of conservation of mass, if 10 grams of hydrogen react with 80 grams of oxygen, what is the total mass of water produced?

Back

90 grams

Front

Which continents show evidence of having similar fossils, supporting the idea of continental drift?

Back

South America and Africa

Front

What is a process that is not a chemical change?

Back

Freezing of water

Front

In which direction does air pressure naturally move?

Back

From high pressure to low pressure

Front

Define 'continental drift'.

Back

The theory that continents have moved over geological time and were once joined together.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new substances.

Front

What is an example of a physical change?

Back

Melting of ice.

Front

What is the primary gas produced during photosynthesis?

Back

Oxygen.