Worksheet Solutions: Air, Water & Food | Science Olympiad for Class 1 PDF Download

Multiple Choice Questions (MCQs)

Q.1. Which of these is essential for a plant to grow?
A: Air
B: Chocolate
C: Toys
D: Books
Answer: A
Solution: Plants need air to perform photosynthesis and grow.

Q.2. What happens to water when it freezes?
A: It becomes steam
B: It turns into ice
C: It evaporates
D: It becomes fog
Answer: B
Solution: When water freezes, it changes from a liquid to a solid form, known as ice.

Ice

Q.3. Which item can show that air occupies space?
A: A bottle filled with sand
B: An empty balloon
C: A rock
D: A cup of water
Answer: B
Solution: An empty balloon can demonstrate that air occupies space when it is inflated.

Q.4. Which of the following can pollute our air?
A: Riding a bicycle
B: Burning leaves
C: Drinking water
D: Eating food
Answer: B
Solution: Burning leaves releases smoke and harmful substances into the air, causing pollution.

Pollution from Burning Leaves

Q.5. What do we call the water bodies like oceans and rivers?
A: Living things
B: Natural resources
C: Food
D: Air
Answer: B
Solution: Oceans and rivers are considered natural resources because they are part of the environment that supports life.

Fill in the Blanks

Q.1. ___ is necessary for burning things.
Answer: Air
Solution: Air is needed for combustion.

Q.2. We use ___ to quench our thirst.
Answer: Water
Solution: Water is essential for hydration.

Q.3. Plants use sunlight, water, and ___ to make their food.
Answer: Air
Solution: Plants use air (carbon dioxide) in the process of photosynthesis.

Photosynthesis

Q.4. ___ helps to keep our body healthy.
Answer: Food
Solution: Eating nutritious food is important for maintaining health.

Q.5. The process of water turning into vapor is called ___.
Answer: Evaporation
Solution: Evaporation is when water changes from liquid to gas.

True or False

Q.1. Air is visible.
Answer: False
Solution: Air is not visible, but we can feel it when it moves.

Q.2. Drinking dirty water is good for health.
Answer: False
Solution: Drinking dirty water can make us sick.

Q.3. All living things need food, air, and water.
Answer: True
Solution: Food, air, and water are essential for the survival of all living organisms.

Q.4. We can breathe underwater like fish.
Answer: False
Solution: Humans cannot breathe underwater without special equipment, but fish can.

Fish breathe under Water

Q.5. Rainwater is a good source of fresh water.
Answer: True
Solution: Rainwater collects and provides fresh water for many uses.

Match the Following

Ans:

1 - a) burning
2 - b) water from plants
3 - c) cleaning floors
4 - d) roots we eat
5 - e) leaves of the tea plant

Solution:

1. Air helps in burning because fire needs air to keep going.
2. Wells provide water that is stored underground and can be accessed by digging.
3. We use water for cleaning floors and other household activities.
4. Carrots are an example of a root vegetable, and we eat the root part.
5. Tea is made from the leaves of the tea plant, which are dried and brewed to make the drink.