Natural Resources and Human Impact — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A town wants to lower air pollution. Which plan helps the most?
A) Build more coal-burning power plants
B) Encourage people to drive much larger trucks
C) Add solar panels and bike lanes for travel
D) Burn extra trash in open backyard fires
Grade 4 science teaches that solar power and biking reduce fossil fuel use and air pollution.
2. Which action helps clean up a polluted river ecosystem?
A) Dumping more garbage into the river
B) Letting factories pour waste straight in
C) Having volunteers remove trash along the banks
D) Pouring used cooking oil down the drain
Grade 4 students learn that cleanup efforts and rules against dumping help restore rivers.
3. Why do many countries protect rainforests as nature reserves?
A) To stop birds and insects from flying anywhere
B) To save habitats and many plant and animal species
C) To create more space for parking large trucks
D) To remove all the trees for new buildings
Grade 4 science explains that rainforests hold many species, and reserves protect their habitats.
4. Which choice is the best example of a sustainable habit?
A) Throwing recyclable bottles in the regular trash
B) Carrying a reusable water bottle to school every day
C) Leaving the television on overnight while sleeping
D) Using a brand new paper plate at every snack time
Grade 4 students learn that reusable items reduce plastic waste and conserve natural resources.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Solar panels and wind turbines are clean, renewable energy sources.
Grade 4 science teaches that solar and wind are key renewable energy technologies.
2. Volunteers who pick up beach litter help reduce ocean pollution.
Grade 4 students learn that cleanup volunteers protect marine ecosystems from trash.
3. An area set aside to protect plants and animals is a nature reserve.
Grade 4 science explains that nature reserves keep habitats safe from harmful human activity.
4. Reusing a water bottle instead of buying new ones reduces plastic waste.
Grade 4 students learn that reusing items cuts plastic waste and saves resources.
5. Making choices today that protect Earth for the future is being a good steward.
Grade 4 science teaches that being an Earth steward means caring for natural resources.