SCIENCE 7

IDENTIFICATION

_______________________ 1. The gradual decrease of forest areas in the Philippines._______________________ 2. Slash-and-burn agriculture_______________________ 3. Mining and the processing of minerals involve the disposal of refuse._______________________ 4. Two activities that contributed deforestation_______________________ 5._______________________ 6. Waste having this property is the type whose poison concentration

can seriously harm a living organism._______________________ 7. Example of waste that may explode _______________________ 8. This is the property of readily susceptible substances reacting with

elements in the environment causing the elements in the release of irritating or poisonous fumes

_______________________ 9. Meaning of OCBs_______________________ 10. Meaning of TNT_______________________ 11. High pH_______________________ 12. Low pH_______________________ 13. This is the property of substances which can easily catch fire_______________________ 14. This means having high pH or low pH_______________________ 15. It is done by choosing and buying reusable, recyclable and

biodegradable products_______________________ 16. It is a method of making used products beneficial for the same

purpose_______________________ 17. It involves reusing or processing of discarded materials for a new

purpose _______________________ 18. Other name for petroleum_______________________ 19. It is a fossil fuel formed millions of years ago from marine plant and

animal remains_______________________ 20. It is another fossil fuel._______________________ 21. Volcanic bluff_______________________ 22. These rocks are used as building materials_______________________ 23._______________________ 24. Rocks are excavated from Earth_______________________ 25. These are natural formed substances_______________________ 26. These are the atoms and molecules arranged in definite, orderly

patterns_______________________ 27. materials which are highly treasured because of their beauty_______________________ 28._______________________ 29. It makes up the outermost layer of the Lithosphere_______________________ 30. It was formed by the decomposition of plants buried and compacted

beneath Earth’s surface_______________________ 31. It is a material pumped from deep under Earth’s surface.

SCIENCE 7

_______________________ 32. It is one of the Earth’s most important natural resources_______________________ 33. Earth’s gaseous part_______________________ 34. The liquid part of the Earth _______________________ 35. The solid part of the Earth_______________________ 36. Metallic minerals such as cooper, iron, and nickel are usually

unearthed from rocks _______________________ 37. A mineral deposit within Earth from which ores can be extracted in

large quantities for commercial use_______________________ 38. A process of excavating minerals from Earth’s crust to obtain

something_______________________ 39. It is the liquid part of Earth about 70% of the Earth’s crust is covered

with water_______________________ 40. It means “little girl”_______________________ 41. Cold water from the depths may also rise to the surface in a process_______________________ 42. The place where the fishermen first observed El Niño_______________________ 43. It is a solution of salts of nearly constant composition which are

dissolved in variable amounts of water_______________________ 44. Number of elements dissolved in seawater_______________________ 45. It is affected by the inflow of the minerals to the water and the water

temperature_______________________ 46. These are caused by differences in water densities tides, a nd the

wind systems_______________________ 47._______________________ 48._______________________ 49. Other names for La Niña_______________________ 50._______________________ 51. It is characterized by the appearance of unusually warm water in the

Pacific Ocean near the start of t he year_______________________ 52. It is the difference I temperature sets_______________________ 53. The studies have shown that variations in the densities of ocean

waters result

SCIENCE 7

ENUMERATION.

3R’s

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Resources of the Earth

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Raw Materials from Land

1. __________________________________

2. __________________________________

3. __________________________________

4. __________________________________

5. __________________________________

6. __________________________________

7. __________________________________

8. __________________________________

9. __________________________________