ckla unit 2 lesson 5 part 2

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

• 25%

• 50%

• 75%

• 100%

Which of the following is a saltwater fish?

• Bass

• Trout

• Shark

• Salmon

Where do freshwater fish live?

• Lakes

• Rivers

• Oceans

• Ponds

How long do salmon live in the saltwater ocean before returning to freshwater rivers?

• 6 months

• 1 year

• 2 years

• 4 years

What type of water is the home of a piranha?

• Saltwater

• Freshwater

• Both

• Neither

What do most piranhas eat?

• Animals

• Plants

• Seeds

• Fruit

What are the breathing organs of a fish called?

• Lungs

• Gills

• Nose

• Mouth

Which fish has lungs in addition to gills?

• Shark

• Cod

• Flounder

• African lungfish

What is the purpose of fish scales?

• To protect the fish

• To help the fish breathe

• To help the fish move through water

• All of the above

How many fish species are known?

• Less than 10,000

• Between 10,000 and 20,000

• Between 20,000 and 30,000

• More than 30,000