rainforest

1. Which among these is an example of an natural ecosystem?

• dam

• grassland

• subdivision

• wheat field

2. Which among these is NOT an artificial ecosystem?

• corn field

• dam

• aquarium

• zoo

3. Which is an example of an abiotic factor in an ecosystem ?

• animals

• decomposers

• plants

• temperature

4. This is the top part of a rain forest.

• canopy

• floor

• subcanopy

• understory

5. What is the main reason of the diminishing rainforest area in the Philippines?

• climate change

• deforestation

• dynamite fishing

• erosion

6. Which is NOT a type of coral reef?

• atoll

• barrier reef

• fringing reef

• lagoon

7. Coral reefs are made up of ___

• algae

• limestone

• rocks

• sand

8. Which of these is called the " rain forest of the sea ".

• beach

• coral reef

• estuary

• lagoon

9. How can mangrove plants tolerate saltwater?

• Their bark is made of salt- proof material.

• They filter salt from the water using there roots.

• They do not absorb saltwater.

• They use salt and water to make food.

10. Which is NOT a function og mangrove roots?

• filter out salts

• build up shorelines

• absorb and store salt from the water

• remove impurities and pollutants from water