General Science -1
1. Why do rotten eggs float in water?
Answer: The average density of a good egg is higher than the concentration of ordinary water. So it sinks in the water. But due to the gas of the rotten yolk of a bad egg, its concentration is less than the normal concentration. That is why rotten eggs float in water.
2. Why do you have to drive slowly in the face of curves?
Answer: The amount of centrifugal force that can drive the car in the right direction is not found when it is facing the curve. Therefore, if the speed of the car is not reduced at the bend, there is a possibility of overturning the car.
3. A piece of iron sinks in water but why do ships made of iron float in water?
Answer: The weight of the water removed by the iron block is much less than the weight of the iron, so the iron sinks. But when a ship is built with the help of iron, the total weight of water removed by that ship is equal to the weight of the ship, so the ship floats.
Answer: The average density of a good egg is higher than the concentration of ordinary water. So it sinks in the water. But due to the gas of the rotten yolk of a bad egg, its concentration is less than the normal concentration. That is why rotten eggs float in water.
2. Why do you have to drive slowly in the face of curves?
Answer: The amount of centrifugal force that can drive the car in the right direction is not found when it is facing the curve. Therefore, if the speed of the car is not reduced at the bend, there is a possibility of overturning the car.
3. A piece of iron sinks in water but why do ships made of iron float in water?
Answer: The weight of the water removed by the iron block is much less than the weight of the iron, so the iron sinks. But when a ship is built with the help of iron, the total weight of water removed by that ship is equal to the weight of the ship, so the ship floats.
4. Why does the balloon rise to the top and burst?
Answer: The higher the balloon, the lower the air pressure. As a result, it explodes as the internal pressure is higher than the external pressure.
5. Why can't words move in emptiness?
Answer: If the word is to continue, one or the other medium is required. Sound cannot be performed without a continuous and elastic medium. So the sound is not performed in the air.
6. Why is it better for the umbrella to be black?
Answer: Black cloth has the highest heat absorption and radiation capacity. This is why it is convenient for the umbrella cloth to be black as it cannot get too hot in the sun.
7. Why is the water in the earthen pitcher cold?
Answer: There are many small holes on the surface of the earthen pitcher through which a lot of water evaporates. As it evaporates, it absorbs some of the heat from the steam residual water, cooling the water in the jug.
Answer: The higher the balloon, the lower the air pressure. As a result, it explodes as the internal pressure is higher than the external pressure.
5. Why can't words move in emptiness?
Answer: If the word is to continue, one or the other medium is required. Sound cannot be performed without a continuous and elastic medium. So the sound is not performed in the air.
6. Why is it better for the umbrella to be black?
Answer: Black cloth has the highest heat absorption and radiation capacity. This is why it is convenient for the umbrella cloth to be black as it cannot get too hot in the sun.
7. Why is the water in the earthen pitcher cold?
Answer: There are many small holes on the surface of the earthen pitcher through which a lot of water evaporates. As it evaporates, it absorbs some of the heat from the steam residual water, cooling the water in the jug.
8. Why do the cat's eyes glow in the dark?
Answer: Cats have pigment cells called a tapetum at a level called the choroid. This causes the cat's eyes to glow in the dark.
9. Why do dogs and cats eat grass?
Answer: Dogs and cats eat grass as a medicine when digestion is disturbed.
10. How can a climbing perch fish survive long after being brought ashore?
Answer: Climbing perch can survive for a long time by taking in oxygen from the air as it has a respiratory system in addition to the gills.
11. How do aquatic animals survive in ice rivers?
Answer: In temperate countries, when temperatures drop below freezing, lake and river water only partially freezes at the surface, but the water below remains normal. So the animals under the water survive.
12. Why is the tongue of the snake torn?
Answer: The snake sticks out its tongue almost all the time. This allows him to smell the snakes of other snakes or prey and quickly decide where to go. There are two holes through which signals reach the brain.
13. Why are tears salty?
Answer: Sodium chloride is an ingredient in tears. Which salts the tears.
14. Why don't we feel pain when we cut our hair and nails?
Answer: There are no nerves in the hair and nails. So we don't feel pain when we cut these.
15. Why is the patient given a water bandage on the forehead if the fever?
Answer: Water collects the necessary heat from the patient's forehead and gradually turns it into steam. As a result, the patient's body becomes cold and comfortable.
16. Why the sky looks blue?
Answer: When the light of the sun falls on the pursuit of the atmosphere and various gas molecules, then the blue color and its adjacent colors.
17. Why the beard shaving mirror is concave?
Answer: Keeping your ace very close to the concave mirror, the size of the reflection looks bigger and it has the advantage of shaving.
18. Why the iron floats on the mercury?
Answer: Iron floats on mercury because the density of mercury is higher than the concentration of iron.
19. Why doesn't the blanket ice wrapped with a blanket melt easily?
Answer: The blanket is a conductor of heat. So heat cannot flow through it.
20. Why does the match stick burn when rubbed?
Answer: the tip of the matchstick contains phosphorus. the little heat generated by friction ignites the stick.
21. Why isn't soap foam in seawater?
Answer: Seawater is salty because it contains a variety of salts such as calcium, magnesium, etc. That is why soap does not foam in water.
22. Why is the flame of fire upward?
Answer: The combination of oxygen and carbon in the combustion area produces a type of gas. this gas goes up and with it, some part of the fire goes up.
23. Why does the water look like a mirror when you look at the surface from above?
Answer: The light shines like a mirror when it is fully reflected as it passes through the water and is reflected in the air.
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