ESS
Grade-8
Easy
Question
Humans depend on_____________.
- Water
- Air
- Coal
- All of these
Hint:
Humans respire.
We have a lot of bodily fluid.
We need energy/electricity for a number of things.
The correct answer is: All of these
The correct option is d)All of these.
- All life is based on water: farming, bathing, washing, wiping, cooking, drinking. Farmers rely on water to irrigate their crops. As humans, we breathe oxygenated air.
- Oxygen is essential for the survival of us and all other animals.
- When we breathe in oxygen, our bodies use it along with the sugars we get from food to produce energy, which makes our activities possible. This process is called breathing.
- Power generation is the most important use of coal worldwide. It burns thermal coal to produce steam, which drives turbines and generators to produce electricity.
- Coking coal (coking coal) is an important component of steel production.
- Coal converted to coke is used to produce about 70% of the world's steel.
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