Block 5 – Lesson 1

Block 5 – Lesson 1

What do you see in the picture?

Phenomena produced on the Earth’s surface such as

rain, evaporation, humidity, temperature and wind, are

consequences of different forms of energy received from

the Sun

This energy is used by plants and some other organisms

that perform photosynthesis to manufacture food for

themselves and for other living organisms.

The Sun emits three kinds of radiations; ultraviolet rays,

visible rays and infrared rays.

There are very few ultraviolet rays, while the visible rays are

the most important for life because plants take that energy

to make their own food. Infrared rays heat the Earth, the

atmosphere and the oceans.

The greenhouse effect is the process by which heat from the

Sun is trapped in the atmosphere (as in a greenhouse for

agriculture).

Sunlight transports energy that heats the Earth. This is the

force that influences climate and weather. People began to

use gasoline and other fossil fuels in the 20th century,

increasing the emissions of carbon dioxide in the

atmosphere. The “GREEN HOUSE EFFECT” has also

increased.

Recently, carbon dioxide and other gases have been

accumulating in the atmosphere. These gases trap the

energy from the Sun and keep them in the atmosphere,

overheating the Earth.

It is possible to overcome this problem by using sources of

clean energy, such as the Sun, wind and water.

What devices do you see in the picture?

What devices do you see in the picture?

Wind turbine - Solar panel - Dam