Earth's Resources and Ecosystems

The video explores Earth's unique ability to support life, focusing on the biosphere's components: lithosphere, hydrosphere, and atmosphere. It discusses natural resources, distinguishing between renewable and non-renewable types, and highlights the importance of air, water, soil, and forests. The video emphasizes the need for sustainable resource use to maintain ecological balance.

What is the life-supporting zone of Earth where the lithosphere, hydrosphere, and atmosphere interact?

• Biosphere

• Lithosphere

• Hydrosphere

• Atmosphere

Which of the following is a renewable resource?

• Petroleum

• Sunlight

• Natural Gas

• Coal

What is a characteristic of non-renewable resources?

• They are inexhaustible.

• They can be replaced quickly.

• They take millions of years to form.

• They are always available.

Which gas is primarily used by plants to make food?

• Oxygen

• Hydrogen

• Nitrogen

• Carbon Dioxide

What is the main component of the atmosphere on Venus and Mars?

• Water Vapour

• Carbon Dioxide

• Nitrogen

• Oxygen

Why is water essential for organisms?

• It is a source of energy.

• It provides structural support.

• It acts as a medium for chemical reactions.

• It is used for photosynthesis.

Where is most of the Earth's fresh water found?

• Ice caps and snow-covered mountains

• Oceans

• Rivers

• Underground

What is the top layer of Earth's crust called?

• Mantle

• Core

• Soil

• Bedrock

What percentage of the world's surface is covered by forests?

• 40-45%

• 20-25%

• 32-35%

• 10-15%

What is the recommended forest cover for a country to maintain environmental balance?

• 40-45%

• 30-35%

• 20-25%

• 10-15%