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JLC Grade 4 Sci Ch 4

JLC Grade 4 Science Chapter 4 Understanding Ecosystems

QuestionAnswer
Work done to repair a damaged ecosystem. Habitat restoration
Having to do with the living factors of an ecosystem. biotic
All the groups of plants and animals living in the same ecosystem environment
Variety in living things. diversity
The living and nonliving things in a particular place. ecosystem
All living and nonliving things around us environment
Harmful substances mixed with water, air, or soil. pollution
A group of the same kind of plant or animals, living in the same ecosystem population
Name of nonliving part of ecosystem abiotic
Examples of living part of ecosystem animals, plants, insects
Examples of nonliving part of ecosystem air, water, soil, rocks, sand
Climate that ecosystems would have most diversity tropical rain forest
Farmer Brown has many mice in his barn. He adopts some cats to live in the barn. Predict: What will happen to the mice population? What will happen to the cat population? Nothing Mice and cat population will increase Mice population will increase and cat will decrease. Mice population will decrease and cat population will increase.
Oil drips from a truck and then washes into a pond. Soon all the fish get sick and die. What is this an example of? Which is correct answer? adaptation erosion restoration pollution
The town closes the landfill and covers it over with soil and trees to make a nice park. What is this an example of? Which is correct answer? biotic factor population habitat restoration erosion
A lawn includes grass, soil, air, insects, earthworms and birds. If you add extra water and fertilizer to the lawn, which part of this ecosystem will change? Which is correct answer? None All because they all interact Grass – because water and fertilizer Soil – because moister and richer ingredients
A tree is covered with bittersweet vines that grew quickly up the tree and blocked light and caused the tree to die. What is this called? Which is correct answer? A tree meeting its needs. Climate changing population. Pollution harming an ecosystem. A biotic factor changing an ecosystem.
Name steps people can we do to reduce air and water pollution Factories: Reduce amount of chemicals released in air and not dump waste in water Drive less and limit the amount of pollution cars give off.
John cleared weeds from one hill for corn. The other hill he left alone until pea season. A rainstorm washed all the soil on the hill he was preparing for corn but the other hill was untouched. What conclusion can you draw? The roots of the weeds help keep the soil in place. The area of soil cleared of the weeds has nothing to hold onto and washes away.
John says that he is conserving energy by riding his bike to work but Mary is not because she drives her car to work. Mary says her car does not impact energy resources and has no impact on the ecosystem. Who is right? John A car uses gasoline, a fuel that cannot be replaced, while a bicycle uses replaceable fuel (energy from food you eat). A car gives off pollution which hurts ecosystem. A bicycle does not give off any pollution and does not affect ecosystem.
Created by: jkm1123