1211 questions and answers in this section
Explain why tides vary according to the Moon?

Explain why tides vary according to the Moon?

Gravitational force is a fundamental interaction of nature, governed by the law of universal gravitation formulated by Isaac Newton in the 17th century. This law...

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Explain why butter becomes soft at room temperature but solidifies again in the refrigerator?

Explain why butter becomes soft at room temperature but solidifies again in the refrigerator?

Butter is mainly composed of fats, water, and proteins. Fats represent about 80% of butter, while water makes up about 15%. Proteins, on the other...

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Explain why bread rises during baking in the oven?

Explain why bread rises during baking in the oven?

Yeast is a unicellular microorganism that has been used for millennia to leaven bread dough. When rehydrated and fed with sugars present in the flour, yeast starts...

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Explain why sunlight is essential for the synthesis of Vitamin D in the body.

Explain why sunlight is essential for the synthesis of Vitamin D in the body.

The UVB rays of the sun penetrate human skin up to the epidermis, the outermost layer of the skin. These rays have a specific wavelength, ranging from...

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Explain why leaves change color in the fall?

Explain why leaves change color in the fall?

The leaves of trees contain several types of pigments that give them their characteristic colors. The most commonly present pigments in leaves are chlorophylls, responsible...

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Explain why do stars shine at night?

Explain why do stars shine at night?

At the heart of the stars, a constant nuclear reaction takes place, mainly the thermonuclear fusion of hydrogen into helium. This fusion process releases a...

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Explain why the Moon appears larger on the horizon?

Explain why the Moon appears larger on the horizon?

When we observe the Moon on the horizon, it often appears larger than it actually is. This phenomenon, known as lunar illusion, is a deceptive...

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Explain why some plants are able to tolerate very acidic soils?

Explain why some plants are able to tolerate very acidic soils?

Plants that can tolerate very acidic soils have developed various adaptation mechanisms to thrive in such conditions. Among these mechanisms, one can mention the ability...

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Explain why cats mainly meow at night?

Explain why cats mainly meow at night?

Cats are nocturnal animals by nature, which means they are more active at night than during the day. Their eyes are adapted for night vision, thanks to...

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Explain why bananas turn yellow?

Explain why bananas turn yellow?

Green bananas mainly contain chlorophyll, a green pigment found in many plants. As bananas ripen, chlorophyll breaks down and allows other pigments to appear. Among...

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