Read the question carefully. Write the letter of your answer on your answer sheet

1. A material will sink in water if_____
a. it is a solid material.
b. It is larger than the water.
c. It is less dense than water
d .it is denser than water.

2. Which of the following materials do not decay?
a. bread
b. banana
c. meat
d. plastic bottles

3. Which of the following is not an example of porous materials?
a. coifon wool
b. fissue paper
c. socks
d. Stones

4. Which of the following best describes porosity?
a. ability to change liquid materials to solid
b. ability to change solid maierials to iquid
c. ability of materials to absorb
d. ability of matenals to decay

5. Lina accidentally threw a glass of water on her study table. What is the best material can she used to wipe the waler?
a. cloth
b. plastic cover
c. plastic bag
d paper

6. Which of the following is not an example of non- porous.
a plastic bag
b. rubber bond
c. gloss
d. Sponges

7. Materials that undergo decaying are called
a biodegradable materials
b. recyclables materiak
c. non-biodegradable materials
d. hazardous materials

8. The following are factors that contribute to the decaying process of the materials. Which is not Included?
a sunlight
b. water
c. stone
d. action of microorganisms

9. Which of the following can decay?
a. plastic cup
b. loaf of bread
c. television
d.ballpen

10.How will dispose decaying waste materials commonly found at home?
a.Make them into compost fertilizer.
b.trow them into the river to feed the fishes.
c.Keep themvin the cabinet and use them again.
d.Mix them with the non-decaying waate materials

11. How should non-decaying waste be disposed?
a.By composting
b.Reusing
c.By recycling
d. Both b and C

12.Which of the following show proper waste disposal?
a.Throwing garbage to the sea
b.Putting all waste materials in on container
c.Throwing leftower foods in the drainage canal.
d.Segregating waste into decaying and no-decaying.

13.Waste should be segregated into_____groups.
a.Decaying and not-decaying
b.Small and Big
c.Bluish and yellowish
d.Hard and soft

14.Why should waste never be disposed down rivers?
a.To avoid pollution of water sources
b.it will be a water clean
c.it will be beatify the rivers
d. it can make the water fresh

15.Which statement is a good practice of disposing water?
a. Throwing away old clothes and broken bags
b.Placing medicines in the cabinet with proper labels
c.Keeping empty containers for future sea
d.Sorting biodegradable and non-biodegradable materials in the trash can.

ll. Write True if the statemene is Correct and false if not.
16. Metal, rubber and plastic materials are porous.

17.A steel sink because it is dencer than water

18Decay means to be slowly destroyed into bits in the presence of water, air and soil.

19.Sink means to go at the bottom of the water.

20.Fruits and vegetables are materials that do not undergo decay.​