Third Periodical Test in Science and Health

Third Periodical Test In Science and Health I. Fill Fill in the the bla blank nkss wit with h the the corr correc ectt ans answe wer. r. Wr Writ itee the the let lette terr onl only. y. 1.A mixture is a combination of two or more ___________  a. solid b. liquid c. substances 2. If the particles of the solid spread evenly throughout the water, the mixture is called __  a. solvent b. a solute c. a solution 3. ______ a substance that dissolve in a liquid a. solvent b. solute c. solution 4. ______ is made up of millions of tiny particles of ashes light enough to float in the atmosphere. a. smoke b. gases c. air  5. Which of the ff. will spread evenly when mixed with water. a. rice b. sugar c. mongo 6. Your brother prepared a mixture of sand and pebbles. How can you separate it? a. by picking b. by sifting c. by heating 7. Why is water called the universal solvent? a. It It is ch cheap b. It It can dissolve ma many substances c. It It is co colorless 8. Which of this will not not dissolve in water? a. salt salt b. sand sand c. suga sugar  r  9. Pepe added some sand to his aquarium, at first the water looked cloudy. Later on the water  looked clear. Why? a. San Sand d set settl tlee at the the bott bottom om b. san sand d spr sprea ead d even evenly ly thr throu ough ghou outt the the wate water. r. c. Sand dissolved in water  10. Which of the f f. substances pollutes the air? a. air b. water c. smoke 11. You are lightly exposed to the sun. How can the heat travels from space to your body? a. by mean meanss of rad radiat iation ion b. by cond condu uctio ction n c. by convi onvicctio tion 12. Friction starts motion of objects. How can friction shown down to stop their motion? a. by energy b. by friction c. by working 13. _____ are substances that burn easily a. Heat b. fuels c. kerosene 14. Friction occurs when _______ surfaces rub each other  a. three b. one c. two 15. What is the common cause of fire? a. cigarette buts b. gasoline c. carelessness 16. Which of these will cause wear and tear when you clean your cooking pan? a. wash cloth b. liquid soup c. steel wool 17. Which of these a product of rapid oxidation a. decay b. fire c. rust 18. Which of the ff. is a fuel? a. cool b. wood c. all of the above 19. Forming a wall by big stones to prevent soil erosion _____. a.Riprap b. terracing c. contour plowing 20. ___ is a large area of land covered with trees. a. forest b. soil c. water  21. ___ causes water from the mountain to flow to the low land causing floods. a. reforestation b. forestry c. deforestation 22. Why is soil good for the plant growth? a. it is made mostly of clay c. it contains humus  b.. it is made mostly of feeble 23. Which of these is formed when a river deposits sediments at its mouth? a. delfa b. mountain c. plain 24. Why is soil important to people? a. Plant grow soil b. soil holds water c. soil contains humus 25. What would happen if trees in the forest were cut and not replaced? a. the soil would be fertile b. the soil would be eroded c. there would be more soil 26. What are the 2 elements that produce heat in fuels? a. carbon and oxygen b. carbon and hydrogen c. carbon and nitrogen 27. A form of energy that can transfer from a hot to a cold body ___  a. heat b. light c. electricity 28. What is the example of oxidation? a. burning of matches b. burning house c. all of the above 29. What is the normal body temperature? a. 37°C b. 38° C C. 36° C 30. The transferring of soil from one place to another. a. eroded b. erosion c. earth