SCIENCE Written Test4 GRADE SIX

SCIENCE 6 Name: __________________________________ Grade/Section: ________ Score: ______ School: ________________________________ Teacher: _____________________________ FIRST-QUARTER Written Test No. 4 Read the questions carefully. Choose the letter of the best answer. 1. What separation technique should you use to easily separate colored pebbles? A. Flotation technique B. Scooping technique C. Using handpicking technique. D. Using chopsticks to separate colored pebbles. 2. Which of the mixtures below can be separated by the flotation technique? A. A mixture of sand, rocks, and soil B. A mixture of pulp, juice, and honey C. A mixture of plastic and stuffed toys and water. D. A mixture of wastes and plastic bottles floating on a lake. 3. You and your friends decided to join in the “Clean-up Drive by the River” campaign. Garbage and other unnecessary wastes can be seen floating along the riverbanks. What tool and technique are best to use to remove wastes and other garbage materials? A. Using bare hands in handpicking technique. B. Use a sieve to separate waste from the river. C. Use a big tool for scooping and scoop out wastes to avoid water pollution. D. Use a filtering device like cloth to remove the wastes and garbage materials. 4. What is a simple distillation technique? A. A technique to get pure water B. A process of heating and cooling liquids. C. A way to cool down vapor from the original water form. SCHOOLS DIVISION OF PASIG CITY Caruncho, Avenue, San Nicolas, Pasig City

D. A process of heating and cooling liquid mixture to separate liquid mixtures. 5. Purifying water is important to avoid diseases. What technique is best to use in separating pure water from other substances? A. Decantation technique B. Distillation technique C. Evaporation technique D. Filtration technique 6. During food processing, metal pieces may accidentally get into the food products. How do factories solve this problem? A. They use filtration to look for the metals. B. They use X-rays to look for the metals. C. Food is placed in magnetic separators that detect and remove any metal pieces in the food. D. They use magnets to look for the metals. 7. What technique will you use if you will separate a mixture of sand and iron filings? A. used of Magnet B. by Filtration C. by Distillation D. by Decantation 8. Which among the situations below shows the importance of evaporation in producing useful products? A. Puddles evaporate after the rain. B. Gradually removes flood water in low areas. C. Clothes dry when hanging outside under the heat of the sun. D. It helps in producing salt, making dried fruits and fish for people’s daily consumption. 9. Which of the following shows the importance of separating mixtures in industrial work? A. The garbage from drainage is filtered using nets. B. Magnets are used to collect iron filings from the sand. C. Street sweepers use dustpans to scoop dust and trashes. 2

D. Sieving is used to separate bigger particles from the sand during the construction of buildings and roads. 10. Which statement shows the beneficial effect of separating mixtures to people and the environment? A. Removing rice chaffs using hands will be fun. B. The evaporation technique is best for drying clothes faster. C. The decantation technique is used to clean rice before cooking. D. Filtering drainage using nets will help prevent water pollution and contamination. AIRA A. SANTISO San Miguel Elementary School, Pasig City 3