24-25_Science_Gr6_CUA5_SCCPSS

Jonathan is learning about water conservation. He learns that the average household in the United States uses 293 gallons of water per day. Jonathan makes a chart that shows the percent of water that each indoor fixture uses in the average U.S. household. He would like to use this chart to determine which indoor fixture uses the most water. Then, he can replace this fixture with a more efficient, water-saving fixture.

According to the chart, which indoor fixture should Jonathan replace with a more efficient, water-saving fixture?

• shower

• faucet

• toilet

• clothes washer

Ice cores from Antarctica allow scientists to measure the amounts of atmospheric carbon dioxide from long ago.

These samples would BEST provide evidence for

• climate change.

• continental drift.

• the big bang theory.

• magnetic field reversal.

According to the theory of climate change, which statement is the MOST LIKELY reason for the current warming of the planet?

• The Sun is getting hotter.

• The Sun is moving farther from Earth.

• The atmosphere is reradiating more heat to Earth.

• The atmosphere is reradiating more heat to space.

The rain forests of the world trap a large amount of carbon dioxide, a greenhouse gas. Every year, however, more rain forest is cut down and burned, releasing huge amounts of carbon dioxide. Which graph BEST shows the likely effect on climate?

• A.

• B.

• C.

• D.

The Industrial Revolution marked a time of great growth. One important fuel during that time was coal. Which graph BEST represents what happened during that time?

• 
• 
• 
• 

According to the diagram, the LEAST amount of water is used in households when people ________.

• use the dishwasher

• take long showers

• water the garden

• wash clothes by hand

Use a broom instead of a hose to clean your sidewalks.

Time your showers to keep them under five minutes.

Check your faucets for leaks.

Reduce the amount of grass in your yard by planting shrubs.

Which is the BEST title for this list?

• Tips to Conserve Water

• Tips to Conserve Energy

• Ways to Reduce Pollution

• Way to Help the Environment

Scientists are predicting a sixth mass extinction on Earth due to several catastrophic events, all as a result ofclimate change.

All of these catastrophic events could be a consequence of increased global temperatures EXCEPT

• increase in sea level

• widespread habitat loss

• increase in biodiversity

• change in global weather patterns

• decrease in global ice

A farmer grows corn on his farm year after year, without a break. What will MOST likely happen on this farm?

• The soil will slowly be washed away.

• The farmer will not need fertilizer to grow corn.

• The soil will have no nutrients to grow the corn.

• The amount of corn harvested will increase every year.

Over the last several decades, scientists have addressed the problem of nonrenewable natural resources such as fossil fuels. Humans are using fossil fuels at a rapid rate, and scientists believe that we will run out of them one day. To solve this problem, research has been conducted on alternative energy sources. One alternative energy source is nuclear energy. Although nuclear energy is a good solution to this problem, there are concerns. Which of these does NOT describe a concern about nuclear energy?

• presence of radioactive waste

• little if any carbon emissions released into the air

• contamination risk when transporting radioactive materials

• thermal pollution from water released into nearby environment