Question 1

What are the two main components of the environment?

Accepted Answer

Both biotic and abiotic components

Answer

Only biotic components

Answer

Only living organisms

Answer

Only abiotic components

Question 2

What is the term used for substances that can be decomposed by microorganisms?

Accepted Answer

Biodegradable

Answer

Non-biodegradable

Answer

Decomposables

Answer

Recyclable

Question 3

Which organisms are known as producers in an ecosystem?

Accepted Answer

Green plants and blue-green algae

Answer

Carnivores

Answer

Herbivores

Answer

Fungi and bacteria

Question 4

What is the main role of decomposers in an ecosystem?

Accepted Answer

They break down dead matter and release nutrients

Answer

They only feed on living plants

Answer

They consume other animals

Answer

They produce energy

Question 5

What is a food chain?

Accepted Answer

A sequence of organisms where one consumes another for energy

Answer

A group of the same species

Answer

A type of habitat

Answer

A large ecosystem

Question 6

What does the 10 Percent Law state?

Accepted Answer

Only about 10 percent of energy is transferred to the next trophic level

Answer

All energy is transferred

Answer

Energy increases at each level

Answer

Energy is only lost at the top level

Question 7

Why are food chains rarely longer than five trophic levels?

Accepted Answer

There is not enough energy left to support additional levels

Answer

Too many species exist

Answer

Energy increases at higher levels

Answer

Only plants can live longer

Question 8

What is bio-magnification?

Accepted Answer

The increase of harmful chemicals at each trophic level

Answer

Energy retention at every level

Answer

Recycling of nutrients

Answer

Decreasing toxin levels

Question 9

What is one major environmental problem caused by humans?

Accepted Answer

Depletion of the Ozone Layer

Answer

Increased biodiversity

Answer

Cleaner air

Answer

More natural habitats

Question 10

What is composting?

Accepted Answer

A method of turning organic waste into manure

Answer

Dumping waste in landfills

Answer

A way to recycle plastics

Answer

Burning garbage

Question 11

What are the two main types of components that make up the environment?

Accepted Answer

Biotic and abiotic components

Answer

Natural and artificial components

Answer

Living and non-living components

Answer

Organic and inorganic components

Question 12

Which of the following is an example of a biodegradable substance?

Accepted Answer

Cattle dung

Answer

Synthetic fibres

Answer

Plastic

Answer

Metals

Question 13

What role do decomposers play in the ecosystem?

Accepted Answer

They help recycle nutrients back into the soil

Answer

They create energy from sunlight

Answer

They consume energy from living organisms

Answer

They produce food for the ecosystem

Question 14

According to the 10 Percent Law, what percentage of energy is typically transferred to the next trophic level?

Accepted Answer

10 percent

Answer

50 percent

Answer

20 percent

Answer

90 percent

Question 15

Why do food chains rarely exceed five trophic levels?

Accepted Answer

There is rarely enough energy left to support additional levels.

Answer

Food sources become too scarce

Answer

Too many organisms in each level

Answer

Predators eliminate too many organisms

Question 16

What is bio-magnification?

Accepted Answer

The concentration of harmful chemicals increases at each trophic level

Answer

The loss of energy in a food chain

Answer

The transfer of nutrients from soil to plants

Answer

The growth of organisms in a food web

Question 17

What is the main source of ozone depletion?

Accepted Answer

Excessive use of CFCs

Answer

Deforestation

Answer

Industrial waste

Answer

Carbon emissions

Question 18

Which method of solid waste disposal involves compacting waste in low-lying areas?

Accepted Answer

Land fillings

Answer

Composting

Answer

Open dumping

Answer

Recycling

Question 19

What is the composition of the ozone layer?

Accepted Answer

Ozone, which is O3

Answer

Nitrogen, N2

Answer

Oxygen, O2

Answer

Carbon dioxide, CO2

Question 20

What is one important ecological concept that represents feeding relationships within a community?

Accepted Answer

Food web

Answer

Food chain

Answer

Trophic level

Answer

Energy transfer

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