Rewards Unit 4 Review

1. The teacher asked students to give an __________________ answer when an exact number was not required.
4. clean water and sunlight are important __________________ for all living things.
7. healthy ecosystem stays in __________________ when all parts work together properly.
10. Careful observations help scientists __________________ the cause of a problem.
11. Scientists use the __________________ method to test ideas and gather evidence.

1. In tropical rainforests, plant life is __________________ and grows in large amounts.
2. Some animals __________________ only at night because they are nocturnal.
3. One __________________ of mammals is that they have hair or fur.
5. Plants and animals are living __________________ that depend on their environment to survive.
6. Water has unique __________________, such as being able to dissolve many substances.
8. ou may solve the problem one way, or __________________, you could try a different strategy.
9. the factory uses a ____________ to make the food.