SCIENCE VI

SCIENCE VI2ND GRADING SUMMATIVE TEST AND REVIEWPREPARED BY: MAREXELLE RUTH P. SANDUANWrite the letter of the correct answer1. Which of the following products is not derived from a forest?a. dyeb. paintc. rubberd. corals2. How does a forest prevent flash floods in the plains?a. it absorbs excess rainwaterb. it prevents rainc. it makes the environment hotd. it shields rain from falling to the soil3. Why are forests good to the environment?a. it absorbs carbon dioxide in the airb. it makes the weather coolc. it destroys the ecosystemd. both a and b

4. Which of the following is the effect of deforestation in the environment?a. soil erosionb. global warmingc. increase plant variety d.both a and b5. Why is deforestation harmful to animals?a.it destroys their homeb. they multiply fast c. it protect them from enemiesd. it gives them more space to play6.. Which is not an effect of deforestation?a. low water supplyb. floods to low areasc. change in livingd. topsoil becomes rich in nutrients7.. Loosening and carrying away of soil that may deposit itself in the water system.a.kainginb. soil erosionc. loggingd. greenhouse8. The failure of animals to survive.a. floodsb. soil erosionc. extinctiond. kaingin

9. Which of the following does not contribute to the disruption of the oxygen-carbon dioxide cycle?a. cutting of treesb. dynamite fishingc. burning of fuel d. planting of trees10 . Why do the government prohibit the dumping of chemical and industrial wastes in our rivers?a. the river is already pollutedb. life underwater is sensitive to sunlightc. dissolved oxygen is increasedd. waste cause water pollution11. Why is cfc destructive?a. it pollutes the waterb. it pollutes the soilc. it destroys the forestd. it destroys the ozone12. It traps sunlight and keeps the Earth warm.A. Ozone Layerb. Atmospherec. Chlorophyll d. greenhouse gases13. It is the Earths most important source of Radiant Energy.A. Sunb. Moonc. Stard. Earth14. how is sound energy produced?A. vibrationb. echoesc. frequencyd. intensity15. Why does lightning flashes first before thunder booms?A. because lightning is brighterB. sound travels faster than lightC. light travels faster than soundD. thunder is covered by clouds

TRUE OR FALSE1. The interdependence of animals and plants can be inferred from the exchange of oxygen and carbon dioxide.2. During photosynthesis, producers used sunlight, water and oxygen to make food.3. Plants give off oxygen and take in carbon dioxide.4. If there were no plants the air will be filled with carbon dioxide.5. If the supply of carbon dioxide is cut-off, photosynthesis cannot take place

truetruetruetruetrueArrange in sequence by using letters A-E.

_____ 6. Plants absorb nitrates in the soil and convert it to plants protein_____ 7. Free nitrogen is converted to nitrate by lightning and by the nitrogen-fixing bacteria_____ 8. Man and animals eat the plant and convert it to make their own protein_____ 9. Ammonia is converted back to free nitrogen by the denitrifying bacteria_____ 10. When an animal dies, decomposers such as the denitrifying bacteria, converts the protein into ammonia

ABCDEIdentify the household material being described.

1. It makes our teeth clean, healthy and strong.2. We apply them to make our floor shiny.3. Ate Cely used them when laundering to make clothes smell good and clean.4. Mother used them to add flavor to the food shes cooking.5. Doctor prescribed them when we have cough and cold.

FLOOR WAXMEDICINEADDITIVESDETERGENTTOOTHPASTETOOTHPASTEFLOORWAXDETERGENTADDITIVEMEDICINEWrite B-biodegradable, NB-nonbiodegradable, H-hazardous, and P-pathological

1. aluminum candy wrappers2. banana peelings3. glass softdrink bottles4. dead mice5. empty paint cans

6. used wound gauze7. fallen leaves8. insecticide cans9. dirty rags10. used cotton buds

NBBNBBNBPBHNBPTell if kinetic or potential1. still water in a glass2. ball at the edge of the table3. mango fruit on the ground4. children roller skating5. a swinging pendulum6. trees on a windy day7. a parked car8. kids playing9. wheels of a moving car10. leaves on a rainy day.

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