1. Vocabulary Review
1. Biology 5. Nutrient
2. Energy 6. Photosynthesis
3. Environment 7. Respiration
4. Matter 8. System
 The natural world that surrounds all living things is called the
environment.
 Most living things need water, air, food, and living space.
 All living things need a source of energy to stay alive and grow.
Ecosystems are made up living things (biotic) and
nonliving things (abiotic)