ESS
Grade-8
Easy
Question
Human’s use __________ as a source of energy.
- Water
- Table
- Natural resources
- Plastic
Hint:
Humans depend on natural resources for energy.
The correct answer is: Natural resources
- Humans depend on natural resources as a source of energy.
- They depend on natural resources for water, air, coal, and minerals.
- Natural resources are hard to recover and highly polluted nowadays.
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_________is a naturally occurring substance that has a definite chemical composition.
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The picture below shows sound waves in different colors. Pick the color of the sound wave which is of the highest frequency.
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