grade 5 , con 3 , lesson 4

Healthy marine environment is important for survival of

• humans.

• lions.

• fish

• deers.

All the following are healthy resources for marine food webs, except

• clean water and food.

• clean food and shelter.

• clean shelter and water.

• polluted water, food and shelter.

When the marine habitats are destroyed, the number of living organisms in their food webs is

• increased.

• decreased.

• not changed.

• doubled.

All the following may occur due to habitat loss, except

• increasing of population.

• decreasing of population.

• extinction of some organisms

• decreasing of resources.

Coral reefs are considered as

• living organisms.

• bacteria.

• ecosystems.

• fungi.

When water temperature increases, algae leave tissues of become bleached

• seabirds

• coral reefs

• clam

• sharks

As a result of coral reefs bleaching, they will be

• increased.

• enlarged.

• survived.

• died.

Plastic waste materials cause all the following to the marine environment, except

• breakdown in food webs

• pollution of water.

• increasing of population.

• decreasing of population.

Both of sea turtles and are present in the same marine food chain.

• deers

• jellyfish

• eagles

• tigers

When coral reefs .......the seawater, they may ingest microplastics.

• evaporate

• filter

• cool

• warm