1.Which of the following words is a compound word?
A. harmful
b. everything
c. matter
d. properties

2. materials are said to be useful when they serve their purpose. what is the antonym of the underlined word in the sentence?( the underlined word is useful)
a. useless
b. harmful
c. expensive
d. different

3. which of the following is a prefixed word?
a. harmful
b. around
c. reused
d. hazard

4. some useful materials may also bring hazards. what is the synonym of the underlined word ( the underlined word is hazards)
a. helpful
b. danger
c. useful
d. different

5. which of the following is a suffixed word?
a. materials
b. products
c. matter
d. resistance

6. when the trees are cut down by_____ loggers, bird's and other Forest animals are deprived of their natural habitat.
a. unlegal
b. illegal
c. dislegal
d. mislegal

7.which of the following is a property of a fabric?
a. hazard
b. brittleness
c. flexibility
d. porosity

8. the following statement's show when a material is useful, except one;
a. used empty bottle's made into a flower vase
b. old newspapers used to pack things in the store.
c. plastic water bottles thrown in the canals
d. candy and juice wrappers made into an eco bag.

9. these are chemicals that destroy bacteria.
a. detergents
b. acids
c. deodorants
d. disinfectants

10.______ are used for killing unwanted insects and pests.
a. soaps
b. insecticide and pesticides
c. alcohol
d. water

11. these are liquids that solidify when exposed to air.
a. liquid soaps
b. paints and varnish
c. justice
d. baby oil

12. what special property of matter is being described by the statement below. reflection of light to a mirror.
a. magnetic
b. brittleness
c. luster
d. elastic
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