21. Which does not describe both the coral reef and the mangrove forest?
a contain a lot of mangrove trees
c. a place where many animals and plants live
b. located near the coastal area
d teems with life
22. Where do coral reefs come from?
a. Mixture of sand and water
c. Feces of fishes living near the shore
b. Remains of once-living corals
d. Wastes from snorkeling
23. What do living and nonliving things do in an ecosystem?
a multiply
b. live
c. interact
d. die
24. Which of the following statements about what makes up our environment is true?
a. Man-made structures such as buildings, bridges, and roads are not part of the
environment
b. Air and sunlight are not part of the environment because we cannot see them
c. Living things in an environment include light, air, water, and soil.
d. Living and nonliving things in an environment interact with one another.
25. Which of the following practices show care of the environment?
a. Allowing fumes and smokes from vehicles exhaust
b. Planting more trees and vegetation
c. Dumping wastes in water sources
d. Using wood as a source of fuel
26. The science club has its activities for the year. Which of the following helps improve the
environment?
a. Tree planting beside the river or lake.
b. Election of the new set of officers at the park.
c. Quiz bee about different scientists in the garden
d. Poster making on the use of cell phones using ink from plants
27. Barangay officials have posted the community activities on the community bulletin board.
Which will help the environment?
a. Barangay security patrols from 11 pm to 6 a.m.
b. Beauty contest to raise funds for the sick
c. Garbage segregation starting January 1
d. Zumba every Saturday and Sunday
28. The garbage can is labeled biodegradable. From your snacks, which should go to this
garbage can?
a. Plastic containers of the mango juice
c. Tissue wrapper of the sandwich
b. Chocolate candy wrapper
d. Plastic straw for sipping
29. After getting everything that can be recycled, the garbage is collected by trucks. Where are
the bags of waste finally placed?
a. landfill
b. forest
d. cave
c. river​