Human Impact on the Environment — Answer Key
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
Using a reusable water bottle creates more plastic waste in oceans.
Corrected: Using a reusable water bottle reduces plastic waste in oceans.
One reusable bottle replaces hundreds of disposable plastic bottles each year.
2. Fix the sentence:
Oil spills in the ocean make seabirds healthier and stronger.
Corrected: Oil spills in the ocean coat seabirds and harm their health.
Oil damages feathers, poisons animals, and pollutes water for many years.
3. Fix the sentence:
Driving a car everywhere instead of walking lowers air pollution levels.
Corrected: Driving a car everywhere instead of walking raises air pollution levels.
Car exhaust adds carbon dioxide and other pollutants to the air.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. Wind turbines turn moving air into clean wind energy.
Wind energy is renewable and creates power without polluting smoke.
2. Saving water, energy, or wildlife is called conservation.
Conservation keeps resources available for future people and animals.
3. When animals lose the place where they live, this is called habitat loss.
Habitat loss is a top cause of species disappearing from Earth.
4. Coal, oil, and natural gas are called fossil fuels.
Fossil fuels are non-renewable and release pollution when burned.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. How does planting trees in your community help the environment?
Sample answer: Trees give shade, take in carbon dioxide, release oxygen, and provide homes for birds and insects.
Trees clean air, cool neighborhoods, and support local wildlife.
2. Why should we use less water when we brush our teeth?
Sample answer: Saving water keeps more clean water available for drinking, plants, animals, and future use.
Conserving water protects rivers and ensures supply during droughts.