General Science Class 7

Area where rainfall is very low resulting barren area is called?

1. Forest
2. Grassland
3. Tundra
4. Desert

Area below ice caps which are very cold climate is called?

1. Forest
2. Grassland
3. Tundra
4. Desert

The food chain always starts from:

1. Producers
2. Consumers
3. Decomposers
4. Predators

The transfer of energy from producers to consumers and then to decomposers is known as:

1. Food Web
2. Food Chain
3. Ecosystem
4. Nutrient Cycle

In an ecosystem several food chains overlap form a network called:

1. Ecosystem
2. Food Web
3. Food Chain
4. Nutrient Cycle

How much percentage of water on the earth is saltwater?

1. 90%
2. 95%
3. 98.5%
4. 97.5%

How much percentage of water on the earth is freshwater?

1. 2.5%
2. 3.5%
3. 4.5%
4. 5.5%

Which one of the following tablets are used for water purification?

1. Aspirin
2. Antibiotic
3. Vitamin C
4. Halazone

The following are the methods to purify water except?

1. Filtration
2. Distillation
3. Crystallization
4. Chlorination

A process by which solvent passes through a porous membrane called?

1. Filtration
2. Distillation
3. Osmosis
4. Sedimentation