What are considered natural treasures that are essential for the survival of living beings?

Natural treasures include air, water, sunlight, soil, plants, animals, and minerals.

Fill in the blank: Trees provide us with fruits, wood, and ___ for animals and birds.

Shelter

Riddle: I am essential for plants to grow and I shine in the sky. What am I?

Sunlight

What role does soil play in maintaining ecological balance?

Soil helps plants grow, which provides food for humans and animals.

Fill in the blank: Fresh air is important because we need it to ___.

Breathe

Multiple Choice: Which of the following is NOT a natural treasure? A) Water B) Air C) Plastic D) Sunlight

C) Plastic

Short Answer: How do natural treasures enhance the quality of life?

They provide essential resources for survival, food production, and ecological balance.

What happens to the body if we hold our breath for too long?

The body doesn’t get enough oxygen, making it hard to function.

Air is primarily composed of ___, ___, and other gases.

Nitrogen, oxygen

True or False: We can survive without oxygen for several days.

False. We cannot survive without oxygen for even a few minutes.

What percentage of air is made up of nitrogen?

78%

Fill in the blank: Oxygen is essential for ___ and ___ processes.

Respiration, combustion

Which gas is least abundant in the atmosphere?

Other gases, which make up about 1% of the atmosphere.

Fill in the blank: Water covers about ___ of the Earth's surface, but most of it is found in oceans and seas.

Two-thirds

Riddle: I flow but I am not a river, I can be found in your kitchen but I am not food. What am I?

Water

What are two sources of freshwater mentioned in the content?

Rivers and lakes.

Fill in the blank: Water pollution occurs when we throw trash and waste materials into ___ sources like rivers and lakes.

Freshwater