Explanation

Water is used for various recreational activities like swimming, rafting, and boating.

These activities promote physical health.

These are popular in tourism and leisure industries.

Explanation

The Earth's atmosphere is divided into five main layers: Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere.

Each layer has unique characteristics such as temperature, density, and composition.

Explanation

The percentage of oxygen in the air is about 20.95%.

The air is made up of many gases, including oxygen, nitrogen, argon, and carbon dioxide

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Nitrogen

Nitrogen is the most abundant gas in the air, making up about 78% of it. 

Argon

Argon is the third most abundant gas in the air, making up about 0.93% of it. 

Carbon dioxide

Carbon dioxide is present in trace amounts in the air, making up about 0.04% of it. 

Explanation

Dispersion occurs when white light passes through water droplets in the atmosphere, causing the light to spread out into its component colors (spectrum).

Each color of light bends by a different amount due to their different wavelengths, resulting in the formation of a rainbow.

Explanation

Greenhouses are structures designed to provide an optimal environment for plants, particularly during colder seasons.

They trap sunlight, creating a warmer, more stable temperature that promotes plant growth in winter or colder climates.