7th Grade Science Final Exam Flashcard

Front

What are changes in states of matter such as boiling, melting, and evaporation called?

Back

Physical changes

Front

What is the ultimate source of energy for Earth?

Back

The sun

Front

What is the process called where individuals better adapted to their environment are more likely to survive and reproduce?

Back

Natural selection

Front

Which organelle is known as the powerhouse of the cell?

Back

Mitochondria

Front

What do we call harmful substances in air, water, or soil?

Back

Pollutants

Front

What is the term for the process of water vapor turning into liquid water?

Back

Condensation

Front

What is the term for the variety of life in the world or in a particular habitat?

Back

Biodiversity

Front

What is the process by which plants convert sunlight into chemical energy?

Back

Photosynthesis

Front

What is the term for the movement of energy through a food chain?

Back

Energy flow

Front

What is the name of the layer of gases surrounding Earth?

Back

Atmosphere