7th Grade Science Human Impact On The
Environment Questions And Correct
Answers Latest Version 2024
World Population Growth Graph shows what kind of change? ANS✔✔ Exponential
Growth
Which human activities negatively affect the environment? ANS✔✔ Destroying
habitats, overexploitation of organisms for food, and digging deeper for fossil fuels.
What possible consequence can come of a continually growing population? ANS✔✔
Overpopulation
In order, what are the four steps that could result in the formation of smog? ANS✔✔
Cars emit hydrocarbons and nitrogen oxides, Polluting gases react with sunlight,
Ozone forms, and Temperature inversion traps pollution.
What are effective ways a company can reduce the pollutants produced by
factories? ANS✔✔ Place devices that remove emissions in the factory smokestacks.
Use low-emission trucks to move products from one place to another. Use
hydroelectric or wind energy sources instead of coal.
Which statement best explains why a hole in the ozone layer of the atmosphere can
cause health problems, such as sunburn or skin cancer. ANS✔✔ Less ozone in the
ozone layer allows more UV radiation to reach Earth's surface.
Explain what happens during each step of the ozone cycle. Use the terms: ozone,
molecule, oxygen molecule, and oxygen atom. ANS✔✔ Step A: UV radiation from
the sun strikes an ozone molecule. Step B: The ozone molecule is broken up into an
oxygen molecule and an oxygen atom. Step C: An oxygen molecule and an oxygen
atom come together. Step D: Another ozone molecule forms.
, A newly built housing development is having trouble with mice and insects in
homes. What would be the reason for this? ANS✔✔ Building houses has taken away
habitats and the animals have not yet relocated.
One concern about the environment is the destruction of rain forests because
people want to use the land for other purposes. To effectively use the rain forest for
other purposes, trees should be (clear cut, uncut, cut into building materials,
selectively cut). Any trees cut should be in (large areas of the forest, forests in rainy
areas, only forest areas on hillsides, small area of the forest). ANS✔✔ Selectively
cut/small areas of the forest.
If you own a farm in the state of Washington, where there is a lot of rain throughout
the year, which two issues would be of major concern in managing the soil on your
farm? ANS✔✔ Erosion and Nutrient depletion
A suburban community chooses to fill in a wetland and build a school there. What is
most likely to happen to the filled-in wetland and the surrounding area? ANS✔✔
Increased erosion, increased flooding, and increased pollution.
Many smaller streams and rivers run into the Mississippi, carrying sediment into its
waters. What is one effect of this sediment on the river? ANS✔✔ It can cover up
nests and eggs of water birds.
What other damage was done by Hurricane Hermine in Florida in 2016 besides one
person being killed and extensive property damage? ANS✔✔ Pollutants from the
land were washed into the ocean water and The salt concentration of the ocean was
reduced by the rain, and some organisms died.
What statement best summarizes the information in the Sources of Oil Release into
US Waters? ANS✔✔ About two-thirds of the oil released comes from natural sources.
What can be done to either prevent the oil release or clean up the results? ANS✔✔
There is nothing to be done to keep natural seepage from the ocean floor, but if the
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