1. What causes a rainbow to form in the sky?
Explanation: Rainbows are formed when sunlight is refracted (bent) and internally reflected inside water droplets, creating a spectrum of colors.
Report for correction2. What is the primary gas that makes a balloon float in the air?
Explanation: Helium is less dense than air, which makes it buoyant and causes balloons filled with helium to float.
Report for correction3. What is the process of water droplets forming on a cold surface called?
Explanation: Condensation is the process of water vapor turning into liquid water droplets on a cold surface.
Report for correction4. What is the process of water changing into vapor due to heat called?
Explanation: Evaporation is the process by which water changes into vapor when exposed to heat.
Report for correction5. Which gas do plants absorb from the air during photosynthesis?
Explanation: Plants absorb carbon dioxide from the air during photosynthesis and use it to make glucose and oxygen.
Report for correction6. Which gas do humans primarily breathe out when they exhale?
Explanation: Humans primarily exhale carbon dioxide as a waste product of respiration.
Report for correction7. What happens when you freeze water?
Explanation: When you freeze water, it changes from a liquid to a solid state and becomes ice.
Report for correction8. What happens when you mix mentos candy with soda?
Explanation: Mixing mentos candy with soda causes a rapid release of carbon dioxide gas, resulting in a foamy eruption.
Report for correction9. What happens when you mix baking soda and water?
Explanation: Mixing baking soda and water produces carbon dioxide gas, resulting in a fizzy reaction with bubbles.
Report for correction10. Which liquid is commonly used to make a rainbow in a glass?
Explanation: Mixing different food coloring in milk can create a colorful display that resembles a rainbow due to the properties of surface tension and density.
Report for correction11. What happens when you mix vinegar and baking soda in a bottle?
Explanation: Mixing vinegar and baking soda in a bottle creates a chemical reaction that releases carbon dioxide gas, resulting in a bubbly eruption, similar to a volcano.
Report for correction12. What do you get when you mix red and blue colors together?
Explanation: Mixing red and blue colors together typically results in the color purple.
Report for correction13. What do you get when you mix red and green colors together?
Explanation: Mixing red and green colors together typically results in the color brown.
Report for correction14. What do you get when you mix red and yellow colors together?
Explanation: Mixing red and yellow colors together typically results in the color orange.
Report for correction15. What is the process of a liquid turning into a gas called?
Explanation: Evaporation is the process of a liquid turning into a gas, typically due to heat.
Report for correction16. What happens when you place a peeled banana in lemon juice?
Explanation: When a peeled banana is exposed to air, it undergoes oxidation, turning brown. Lemon juice can slow down this process due to its citric acid content.
Report for correction17. What happens when you place a coin in a glass of water?
Explanation: Coins are denser than water, so they sink when placed in a glass of water.
Report for correction18. What happens to a balloon when you rub it against your hair and then hold it near small pieces of paper?
Explanation: When a balloon is rubbed against hair, it becomes charged with static electricity, which attracts small, lightweight objects like pieces of paper.
Report for correction19. What causes the Earth to have day and night?
Explanation: The Earth's rotation on its axis causes the cycle of day and night as different parts of the planet are exposed to sunlight.
Report for correction20. What happens to a paper towel when you place one end in water and the other end hanging outside the glass?
Explanation: Capillary action causes water to move up the paper towel, wetting the dry part of the towel.
Report for correction21. When you mix oil and water, what happens?
Explanation: Oil and water do not mix because they have different densities and polarities, causing them to form distinct layers when combined.
Report for correction22. What is the main purpose of a magnifying glass?
Explanation: A magnifying glass is used to magnify and enlarge objects, making them appear larger and more detailed.
Report for correction23. What is the main function of a telescope?
Explanation: Telescopes are primarily used to observe and study distant objects in space, such as stars, planets, and galaxies.
Report for correction24. Which fruit can be used to generate electricity in a simple experiment?
Explanation: A banana can be used as a source of electricity in a simple experiment because it contains electrolytes.
Report for correction25. What causes the sound of thunder in a thunderstorm?
Explanation: The sound of thunder is caused by the rapid expansion of air due to the intense heat of lightning during a thunderstorm.
Report for correction