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Conservation and restoration

1. Elephant
2. By human slaughter, habitat destruction and lead to extinction.
3. 1883
4. Panda, hornbills, Sumatran rhino
5. Carambola turtle
6. Nourished by parasitic survival on the vine.
7. Skin, horns and meat

Chemical properties of substances

1. Acidic, neutral and alkaline
2. Acid: sour, neutral: tasteless / salty / sweet, alkali: slippery / bitter
3. Acid: tomato, neutral: rice, basic: soap

can

1. Sun, food, waves
2. He Zineng, batteries, chemical fuel
3. Object height has potential. Potential also exists in the foot is bent, the rubber band is stretched or compressed spring.
4. Chemical energy
5. With light we see around objects.
6. Heat make us feel warm, but also so that we can cook food.
7. It refers to chemical fuels coal, oil and natural gas.

microorganism

1. virus
2. Moisture, nutrients, air, appropriate temperature, an appropriate acidity (two)
3. Streptococcus, E. coli, salmonella, bacilli (three)
4. Morphological diversity, we need to rely on other organisms to survive
5. It can be made into bread
6. Anti-body can be made vegetarian 
7. It can cause various diseases

Solar System

1. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
2. Jupiter, Saturn, Uranus and Neptune.
3. 63 natural satellites.
4. Bright comet with a long tail.
5. 1：4：400
6. Earth's temperature rises, the Earth's water will dry up, creature death.
7. "Living Planet."

Eclipse and solar eclipse

1. In the full moon night
2. No, the light can pass through the transparent body
3. When the sun, Earth and moon in a straight line, but in the sun between Earth and the moon
4. Red-brown moon
5. When the sun, Earth and moon in a straight line, while the moon is located between the Sun and the Earth
6. The lunar umbra only area where people will total solar eclipse was observed
7. Volume smaller than Earth's moon is small, umbra and penumbra