Interesting life encyclopedia quiz book

Part 1

1. What is the water content of a watermelon in general (92%).

2. About how long does it take for the Earth to rotate one week? (one day)

3, usually, we hear the sound is transmitted by what? (air

4. Normally, how much water is in vegetables? (90%)

5, put a pencil into a cup of water, it looks as if the pencil is bent what is the phenomenon? (Refraction)

6, white objects and black objects, which is more reflective? (white)

7, in general, how much water in the egg? (70%)

8, the food pyramid, also known as the dietary pagoda, *** divided into how many layers? (five layers).

9, human movement is controlled and coordinated by what system? (central nervous system).

10, when watching 3D TV, what glasses are used? (polarized glasses).

Part II

1. In general, how much water is in a fish? (85%)

2, what kind of phenomenon can happen to a gas (thermal expansion and contraction)

3, what are some ways to speed up dissolution? (heating, stirring, crushing)

4, the movie is made according to what principle of the human eye? (visual temporary)

5. What is formed by the rotation of the Earth? (day and night)

6, the human body can conduct electricity? (Can)

7, convex lens has what role? (converge light)

8, the carbon rod in the battery is which pole of the battery? (positive)

9, carrots will wilt after a long time, what is the reason? (radish water evaporation)

10, home lighting circuits used in the wire is mainly made of which metal? (Copper)

Part III

1, vitamin C has a reducing properties, can not eat with seafood.

2. Which is bigger, the Earth or the Moon? (Earth)

3, the family has a cactus. (Leaf)

4. What upward force does a ship experience in the water? (Buoyancy

5. What kind of mirror is a myopic lens made of? (concave lens)

6, thermometer is made according to what principle? (Thermal expansion and contraction principle)

7, in the household items which use magnetism? (computers, bank cards, radios, etc.)

8, fish rely on what to breathe? (gills)

9, new furniture usually have formaldehyde present, you can put on the concentrated ammonia to absorb formaldehyde.

10, sausage, cured meat, pickles contain sodium nitrite, in the human body under certain conditions to generate amine nitrite, carcinogenic substances.

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