More Classes

5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject

General Science 8th Class English Medium Chapter 1 Online Test MCQs With Answers

Question # 1

Green house gases is

Choose an answer

Carbon di oxide

Methane

Oxides of nitrogen

All these

Skip

Question # 2

------------- gas is released when dead organisms are decomposed by the decomposers.

Choose an answer

Oxygen

Carbon dioxide

Nitrogen

Hydrogen

Skip

Question # 3

Half of the increase in atmospheric carbon dioxide concentrations in the last.............. years has occured since 1980

Choose an answer

100

200

300

400

Skip

Question # 4

The organisms upon whihc a redator feeds are called.

Choose an answer

Prey

Carnivores

Herbivores

Producers

Skip

Question # 5

A relationship where two species live together closely is called

Choose an answer

Symbiosis

Predation

Competitor

None of these

Skip

Question # 6

Consumers that actively hunt other organism are called.

Choose an answer

Prey

Competitor

Predator

Symbiont

Skip

Question # 7

A relationship where two species live togetehr closely is called.

Choose an answer

Mutualism

Commensalism

Symbiosis

Hebitate

Skip

Question # 8

The poisonous and harmsful substances which make the air unfavorable for life are called.

Choose an answer

Solid pollutant

Air pollutant

Water pollutant

Acid Rain

Skip

Question # 9

Carbon cycle and ............. cycle are teh processes in whihc these minerals circulate between the organisms and the environment.

Choose an answer

Hydrogen

Iodine

Oxygen

Nitrogen

Skip

Question # 10

------------- through the food chain is one of the most important functionsof an ecosystem in maintaining balance of nature.

Choose an answer

Waisting of energy

Destroy fo energy

Transfer of energy

Produce of energy

Skip

Question # 11

A symbiotic relationship in whihc both speciesl get benefit is called.

Choose an answer

Commensalism

Hebitate

Mutualism

Symbiosis

Skip

Back