1211 questions and answers in this section
Explain why potatoes become soft if they are cooked in salty water?

Explain why potatoes become soft if they are cooked in salty water?

Potatoes have a unique cellular structure that gives them their characteristic texture. When cooked in water, the cells of the potatoes absorb some of the...

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Explain why airplanes fly in the air?

Explain why airplanes fly in the air?

Lift is the aerodynamic force that keeps an aircraft in the air. It is generated by the pressure difference between the intrados (lower surface of...

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Explain why do plants need photosynthesis to survive?

Explain why do plants need photosynthesis to survive?

The capture of solar energy allows plants to convert sunlight into usable chemical energy. This vital process, known as photosynthesis, mainly takes place in the...

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Explain why peppers are often associated with sensations of heat in the mouth?

Explain why peppers are often associated with sensations of heat in the mouth?

Peppers contain a substance called capsaicin. Capsaicin is a chemical compound that causes a sensation of heat when it comes into contact with heat receptors...

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Explain why does ice float on water?

Explain why does ice float on water?

Ice floats on water due to its density. When water freezes to form ice, the water molecules arrange themselves in a crystalline structure that takes...

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Explain why solar and lunar eclipses occur periodically?

Explain why solar and lunar eclipses occur periodically?

The Earth rotates around its axis in about 24 hours, causing the cycle of day and night. This rotation is responsible for the change of...

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Explain why the disappearance of predators causes imbalances in ecosystems?

Explain why the disappearance of predators causes imbalances in ecosystems?

The disappearance of predators leads to a disturbance within ecosystems by directly affecting the food chain. In the absence of predators to regulate prey populations, the latter...

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Explain why lightning occurs during electrical storms on planets other than Earth.

Explain why lightning occurs during electrical storms on planets other than Earth.

The atmosphere of the other planets in the solar system varies in composition depending on several factors, including distance from the Sun, planet mass, and...

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Explain why photosynthesis is crucial for the survival of living beings.

Explain why photosynthesis is crucial for the survival of living beings.

Photosynthesis is a vital process for many living organisms, especially plants, algae, and some bacteria. It takes place mainly in the chloroplasts of plant cells, where sunlight...

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Explain why the colors of paintings fade over time?

Explain why the colors of paintings fade over time?

The colors of paintings can fade over time due to exposure to light. The pigments used in paintings can be sensitive to light, especially to...

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