The document defines several energy-related terms including acid rain, which results from water containing chemical elements; atoms, which are the smallest part of an element that retains its chemical properties; biomass, which is organic mass produced biologically and used as an energy resource; coal, which is a carbon-based mineral substance used as a fuel; combustion, which is the process of burning; fuel, which is a material that can be burned to create heat or power; hydropower, which is power generated from water; and pollution, which refers to toxic emissions from factories that contaminate the environment. It also includes questions that test understanding of these terms.

1. Energy

2. Acid rain
It is a result of combination of water
containing chemical elements.

3. Atom
The smallest part of an element that still
has the chemical propierties of the
element.

4. Biomass
Organic mass produced by a biological
process. It is used as energy resource.

5. Coal
A mineral substance made of carbon
used as a fuel.

6. The process of burning.
Combustion
Hydropower

7. Matter that can be burned to create heat or
power.
Fuel
Hydropower

8. Hydroelectic power. Power made by
water.
Hydropower
Hydropower

9. Toxic emissions from factories that
contamins the environment.
Pollution
Hydropower

10. Question

11. What is a mineral substance
made of carbon, used as a
fuel ?
a)Iron
b)Coal
c)Granite

12. What is a result of combination
of water containing chemical
elements?
a)Combustion
b)Polluction
c)Acid rain

13. What is the smallest part of an
element that sill har the chemiral
properties of the element ?
a)Coal
b)Atom
c)Biomass