Natural Resources and Human Impact — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Which choice is the best example of conserving a natural resource?
A) Leaving the kitchen faucet running while brushing teeth
B) Turning off lights and faucets when they are not needed
C) Throwing all paper in the regular trash can
D) Driving a car to places only one block away
Grade 4 science teaches that turning off lights and water saves energy and water for future use.
2. Which energy source is renewable and produces almost no air pollution?
A) Coal burned at a power plant
B) Gasoline used in a car engine
C) Solar panels on a building roof
D) Natural gas in a home furnace
Grade 4 students learn that solar panels capture renewable sunlight without burning fossil fuels.
3. What is the main goal of recycling paper, plastic, and metal?
A) To make trash piles look much neater
B) To turn old materials into new products
C) To increase the amount of garbage in landfills
D) To stop people from buying any new items
Grade 4 science explains that recycling reuses materials, saving resources and reducing waste.
4. Which action best protects animal habitats in a forest?
A) Cutting down all the largest trees first
B) Building factories where animals nest
C) Creating a protected park or nature reserve
D) Letting trash blow into the woods freely
Grade 4 students learn that nature reserves and parks protect ecosystems and animal habitats.
Part B: Fill in the Blank
Write the correct answer on each line.
1. The three Rs of conservation are reduce, reuse, and recycle.
Grade 4 science teaches the three Rs as key actions to conserve natural resources.
2. Tall wind turbines spin in the wind to make clean electricity.
Grade 4 students learn that wind turbines turn moving air into renewable electricity.
3. Using resources carefully so they last for the future is called conservation.
Grade 4 science explains that conservation helps Earth keep enough resources for everyone.
4. Planting new trees to replace ones that were cut is called reforestation.
Grade 4 students learn that reforestation restores forests and habitats for animals.
5. A way of life that meets needs without using up resources is sustainable.
Grade 4 science teaches that sustainable choices protect Earth for future generations.