What is the primary gas that all living things need to survive?

Oxygen is the primary gas that all living things need to survive.

Fill in the blank: Air is a mixture of gases including nitrogen, oxygen, and ___, which is used by plants to prepare food.

Carbon dioxide

True or False: Dust particles in the air are visible to the naked eye at all times.

False. Dust particles are often only visible when illuminated by a beam of light.

Riddle: I am invisible but can be felt when I move. When I am strong, I can cause storms. What am I?

Air

What role does water vapour play in air?

Water vapour is formed when the sun heats water, and it mixes with the air, contributing to humidity and weather patterns.

Fill in the blank: Strong winds that cause destruction are often associated with ___ and ___ during storms.

Rain and thunder

Multiple Choice: Which of the following is NOT typically found in air? A) Oxygen B) Water vapour C) Gold D) Nitrogen

C) Gold

What happens to air when something is burned?

When something is burned, it produces smoke that gets mixed with the air, contributing to air pollution.

What percentage of the Earth's surface is covered with water?

Around 71% of the Earth's surface is covered with water.

True or False: Things can burn in the absence of air.

False. Things do not burn in the absence of air.

What role does air play in the functioning of windmills?

Air (wind) helps to run windmills, which are used to pump water and generate electricity.

Fill in the blank: Plants need air to make ___.

Food

Multiple Choice: Which of the following is NOT a use of air? A) Helps kites fly B) Provides nutrients to plants C) Fills balloons D) Allows for burning

B) Provides nutrients to plants

What is the significance of water for living organisms?

Water is essential for the survival of all living things, including plants, animals, and humans.

What are the three states in which water can be found?

Water can be found in solid, liquid, and gaseous states.

Rain is primarily responsible for filling which types of water bodies?

Rain helps fill oceans, seas, lakes, and ponds.

Fill in the blank: Underground water can be drawn through ___ and ___ for use.

Wells and tube wells

True or False: Water from oceans and seas is safe to drink without treatment.

False. Water from oceans and seas contains salts and minerals that make it unsafe to drink.

Riddle: I can flow, freeze, or turn to steam. I am essential for life, and I’m found in your drink. What am I?

Water

What role does water play for plants?

Water is essential for plants to make food; without it, they wilt and die.

Fill in the blank: Potable water is water that is ___ to drink.

Safe

How do aquatic animals use water?

Aquatic animals use the oxygen dissolved in water for breathing.

True or False: Humans can survive longer without water than without food.

False. Humans can survive for only a few days without water, but much longer without food.