3rd Summative Test for Grade 6 in Science

1.     Our country is very rich in natural resources. What is our nations most productive ecosystem?

• a. Aquatic

• b. Desert

• c. Grassland

• d. Tropical Rain forest

2.     Tropical rain forests receive great amount of rainfall and humidity, which encourages an abundant growth in vegetation. Where can you find tropical rain forests?

• a. Countries near the equator

• b. Countries in the polar region

• c. Countries in the lower latitude

• d. Countries in the higher latitude

3.    Rain forest has 4 major Layers. Which of the following is not a major layer of rain forest?

• a. Canopy Layer

• b. Emergence Layer

• c. Emergent Layer

• d. Forest Floor

4.      Which of the 4 major layer holds the scattered seeds, fruits, and fallen leaves and branches from the plants in the higher layers, which animals use or eat to survive in the forest?

• a. Canopy Layer

• b. Emergence Layer

• c. Forest Floor

• d. Under Canopy layer

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

• a. Climate Change

• b. Deforestration

• c. Dynamite Fishing

• d. Erosiom

6.     Mangrove swamp and forests serve as the nurseries of various organisms. Which of the following organisms is not found in mangrove forests?

• a. Eagles

• b. Hermit Crabs

• c. Herons

• d. Prawns

7.     How do mangroves survive in seawater?

• a. Mangrove roots filter the salt from the seawater

• b. Mangroves have very light bodies, which let them float on water.

• c. Mangroves have thick bark, which collect salt and uses it as food.

• d. Mangroves have large roots, which hold them tightly to the ground.

8.     How do mangroves forests filter silt, dirt, and sand from rivers?

• a. The healthy leaves of mangroves block particles

• b. The thick bark of mangroves blocks the particles from the land.

• c. The numerous stilts like roots of mangroves serve as filter for these particles.

• d. The decayed, fallen leaves of mangroves block the sediments from reaching the sea.

9. How do mangrove forests help other ecosystem like coral reefs?

• a.    Mangroves drain the nutrients from the sea.

• b.    Mangroves block waves that approach the shorelines

• c.    Mangroves provides a temporary habitat for migratory birds

• d. Mangroves filter the stilt and sediments from inland waters before they reach the sea.

10.     Coral reefs are massive and diverse ecosystems under the sea. It is also called as the “rain forest of the sea”. What type of coral reefs are found near the shore?

• a. Atolls

• b. Barrier reefs

• c. Fringing reefs

• d. Great reefs