中一Science問題

1.When we use the Bunsen burner, we should wear safety spectacles/safety googles to protect our eyes.

2 When we build a hydro-electric power station on a river, a dam is built to store water at a high position.
3 When a flag is raised, the potential energy of the flag will be increased
4 We can use a (唔記得左sor-,-) to clean test tubes.
5 We can see the yellow flame of a Bunsen burner easily because the flame is hot and not very dangerous.
6 The solid which cannot pass through a filter is called residue.
7 The motor is a device that changes electrical energy to kinetic energy.
8 The habitat of camels is the desert
9 The objective adjusts the amount of light entering the microscope.
10 Sunflowers grow towards light. This is an example of living things reacting to the weather in their environment.
11 Snakes are classified as amphibious because they have dry, hard scales and breathe with lung
12 Plants can remove their wastes by falling of rain.
13 Matter is anything which has mass and takes up spaces .
14 Marine oil spill greatly affects the natural environment
of many fish and seabirds
15 LPG stands for liquefied petroleum gas .
16. Filtration cannot remove insoluble impurities and micro-organisms.
17 Filtration can remove soluble impurities in water.
18 Dolphins and whales look like a fish but they belong to the group called amphibious.
19 Coal and oil belong to non-renewable energy sources. Once they are used up, there is no way to produce more in a short time.
20 Butterflies, earthworms and snails can be classified into the same group called non-backbone because they do not have backbones.
21 Babies drink milk each day. The chemical energy in the milk supports their growth
22 A moving car possess kinetic energy.
23 Electrical the most common energy source used at home today because it is clean and convenient.

24 cell wall is a jelly-like substance in a cell for chemical reaction

2012-07-30 18:02:06 補充：
哈,我打d問題搞到late左俾你汁左頭香,哼!

1) goggles: 2) hydroelectric; 3) potential; 4) brush; 5) combustible; 6) residue; 7) kinetic; 8) desert; 9) diaphragm; 10) sunlight; 11) reptile: 12)dead leaves; 13)mattered ---matter; 14)habitates; 15) liquefied petroleum group; 16)all; 17) some; 18) marine mammal; 19) potential; 20) invetebrates; 21) potential; 22)kinetic; 23)electricity; 24)cytoblastema;

1. safety glasses
2. hydroelectric
3. potential
4. test tube brush
5. luminous
6. residue
7. kinetic
8. desert
9. diaphragm
10.stimuli
11./
12./
13. mass,space
14. habitat
15. petroleum gas
16. soluble
17. soild
18./
19. non-renewable
20./
21. chemical
22. kinetic
23. electricity
24. cytoplasm

/ =唔知
sorry