Some animals have gills to breathe underwater by extracting oxygen from water and releasing carbon dioxide.

MCQs

1. Which of these animals does not have gills?

A) Shark
B) Dolphin
C) Goldfish
D) Crab

 

2. Why can’t humans breathe underwater using gills like fish do?

A) Humans don’t have gills.
B) The water is too cold.
C) Humans can breathe underwater.
D) The water is too salty.

 

3. How do gills work in fish?

A) By taking in water and squirting it out fast
B) By filtering out food from the water
C) By extracting oxygen from water
D) By making bubbles

 

4. Which of the following environments would you most likely find animals with gills?

A) Desert
B) Forest
C) Ocean
D) Mountains

 

5. What is one advantage of having gills for aquatic animals?

A) They can see in the dark.
B) They can breathe underwater.
C) They can walk on land.
D) They can fly.

 

Fill in The Blanks

Choose from These Words: water, oxygen, carbon, underwater, water.

1. Fish have gills because they live in _______.

 

2. Gills help animals extract ________ from the water.

 

3. Animals with gills release ________ dioxide.

 

4. Why do some animals have gills? To help them breathe _________.

 

5. Gills are organs that help animals extract oxygen from the ________.

 

True / False

1. All animals have gills (True / False)

 

2. Gills help animals breathe underwater (True / False)

 

3. Gills are found in animals that live on land (True / False)

 

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