1. 4 th Grade Chapter 4 Test

2. What happens during recycling? A.Materials stay the same B.Materials are washed and cleaned C.Materials are broken down and used again D.Materials are moved to a different place

3. Living things that eat dead organisms are called… A. Decomposers B. Predators C.Producers D.Scavengers

4. Living things that break down the remains of dead organisms are called… A.Carnivores B.Composers C.Decomposers D.Producers

5. What do microorganisms do in the compost piles? A.They turn rock into dirt B.They turn food into rocks C.They break down living matter. D.They make matter

6. What material would not break down very well in a landfill? A.A banana peel B.A dead fish C.A leaf D.A plastic bag

7. The process of breaking down materials into a different form that can be used again is called _____________________. Nutrient Recycling

8. A(n) __________ is a living thing that breaks down the remains of dead organisms. Decomposer

9. A(n) __________ is an animal that feeds on the remains or wastes of dead animals. Scavenger

10. __________ is decayed material from once-living things that is used to enrich the soil. Compost

11. __________ is trash that is not disposed of in a way that prevents harm to ecosystems. Litter

12. __________ is the addition of harmful materials to the environment. Pollution

13. A material that causes pollution is called a(n)________. Pollutant

14. A waste that can pollute the environment even when it occurs in very small amounts is called a(n) ___________. Hazardous Waste

15. A(n) _________ is matter that breaks down easily in the environment. Biodegradable material

16. _________ involves travel to natural habitats that avoids harming and helps preserve these areas. Ecotourism

17. What do scavengers eat? Scavengers eat what is left by predators

18. Label this organism as a… A.Scavenger B.Carnivore C.Decomposer D.Omnivore

19. How does recycling nutrients help many types of plants in an ecosystem? Recycling nutrients enriches the soil

20. How can materials such as weed killers and pesticides cause pollution? Materials such as weed killers and pesticides can wash off plants and seep into the soil

21. Tell what would happen if decomposers were the end of all food chains. The remains of dead organisms would not be broken down into simpler materials. Space in the environment would not be freed up.

22. Look at the graph. If plastics, metals, glass, paper and cardboard were recycled, what percent of garbage would be recycled? 60%