New 20/21 Post test Unit 7: Earth and Human Activities

Test knowledge on Earth & Human Activities! Covers recycling, landfills, and resource protection.

Which human activity helps protect human resources? Recycling aluminum cans Building more roads and stores Using plastic bottles for drinking water Throwing cans and plastic in the trash can Some things need to be taken to a landfill. Many landfills have liners and covers. The liners are made of plastic or thick clay or concrete. After many years, the trash in the landfill will decompose. Some types of trash decompose quickly while others, like a glass bottle, can take 100 years ot decompose. How do the liners and covers help to protect the environment? by reducing the amount of materials in the landfill by keeping toxic materials out of the soil and waterways by increasing the rate of decomposition of the materials in the landfill by turning the trash into materials that are usable by plants in the ecosystem. Building highways impacts the environment. One national park in Canada is trying the lessen the impact. Park employees built 8-foot-tall fences along the highway. They also built 22 tunnels under the highway and large land bridges over the highway. How are these changes likely to help the environment? Cars will not pollute the environment as much. The fences will keep animals contained in a smaller space. Animals will be able to move freely without being struck by cars. Water runoff from the highway will not go into the lakes and rivers. Veronica lives in a city that has started a composting and recycling program. She is not sure which objects to put in which bin. Which source would be the most reliable for determining which objects to put in which bin? ask her parents look in her textbook use brochures provided by the city do an online search for compost and recycling Making pavement uses chemicals that can be dangerous to the air. It also covers the ground so that water runs off instead of soaking down into the ground. Some cities are using sediments and small rocks instead of pavement. In which way does this most help the environment? reduces flooding increases air pollution makes parking lots hotter removes water from water table The pictures show human activities that use renewable or nonrenewable resources.Write the letters of the pictures in the correct boxes. ABC Renewable A C Nonrenewable B Most scientists are worried about the environment. They gather the following information-The number of trees cut down each year-the number of trees burned each year-the levels of carbon dioxide on Earth-the levels of oxygen on EarthCircle the letters of the two questions they are studying. (Choose all that apply) How tall do trees grow? What are trees used for? How does burning trees affect the air Which tools are best for cutting down trees? How does the loss of trees increase air pollution? Fill in the blank to show how humans are doing things to protect Earth's resources. Fill in Yes if the picture shows protecting the environment. Fill in No if the picture does not show protecting the environment. Yes Yes No No Match each scientific question about the environment to the data that would be needed to support it. Draw a line from each question to the correct data. Does trash affect sea turtles? the cause of death of ocean animals How has trash affected outer space? the number and type of rockets that did not return to Earth Is burning trash better than allowing it to decay? the type of chemicals released when broken down in different ways For how many years does trash affect the environment? how many years it takes plastic to break down People use a natural resource to make paper. Identify the natural resource used to make paper. Explain how using the resource in your last answer affects other parts of the ecosystem it is removed from.