Answer:

1. All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the electromagnetic radiation spectrum. Solar radiation includes visible light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays. Radiation is one way to transfer heat.

2. The Sun rises and sets exactly due east and west only when the circular path of our turn on Earth's surface splits into two equal parts, half in the light and half in the dark. As our planet's rotation axis tilts by 23.5° with respect to its orbital plane, this alignment happens only at the spring and fall equinoxes.

3. Sunlight helps the brain produce hormones that the body needs to function. Also the skin also uses sunlight to make vitamin D. SAD lamps, also known as sun lamps or light boxes, work by imitating sunlight.

Explanation:

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