1. Generally speaking, what is the water content of watermelon (92%)?
2. How long does it take for the earth to rotate once? (one day)
3. Under normal circumstances, what does the sound we hear spread? (air
4. In general, what is the moisture content in vegetables? (90%)
5. Put a pencil in a glass of water, it looks like the pencil is bent. What is this phenomenon? (refraction phenomenon)
6. Which is more reflective, a white object or a black object? (white)
7. In general, what is the water content of eggs? (70%)
8. The food pyramid is also called the food pagoda. How many floors does it have? (fifth floor).
9. What system controls and coordinates human movements? (Central nervous system).
10. What glasses do you use to watch 3D TV? (polarized glasses).
extreme
1, generally speaking, how much water does a fish have? (85%)
2. What will happen to the gas (thermal expansion and cold contraction)?
3. What are the methods to accelerate dissolution? (heating, stirring and grinding)
4. What principle is the movie made according to the human eye? (visual persistence)
5. What is the formation process of the earth's rotation? (day and night)
6. Can the human body conduct electricity? (yes)
7. What is the function of convex lens? (Convergent light)
8. Which pole is the carbon rod in the battery? (positive electrode)
9. Carrots will fade if left for a long time. What is the reason? (The water in radish evaporates)
10. What kind of metal are the wires used in household lighting circuits mainly made of? (copper)
Tisso
1, vitamin c can be reduced and cannot be eaten with seafood.
2. Which is bigger, the earth or the moon? (Earth)
There is a cactus at home. Excuse me: What are the thorns on the cactus? (leaves)
4. What upward force will the ship receive in the water? (buoyancy
5. What kind of mirror are myopia lenses made of? (concave lens)
6. What is the principle of thermometer? (principle of thermal expansion and cold contraction)
7. What kind of household goods use magnetic force? Computers, bank cards, radios, etc. )
8. What does the fish breathe? (Jill)
9. Formaldehyde generally exists in new furniture, and it can be absorbed by concentrated ammonia water.
10. Sausages, bacon and pickles contain sodium nitrite, which will generate ammonium nitrite and carcinogens in the human body under certain conditions.