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The Northern Lights
The sun is stormy and has it own kind of weather. It is so hot and active that even the Sun’s gravity cannot hold its atmosphere in cheek! Energy flows away from the Sun toward the Earth in a stream of electrified particles that move at speeds around a million miles per hour. These particles are called plasma, and the stream of plasma coming from the Sun is called the solar wind. The more active the Sun, the stronger the solar wind.
The solar wind constantly streams toward the Earth, but don’t worry because a protective magnetic fields surrounds our planet. The same magnetic field that makes your compass point north also steers the particles from the Sun to the north and south poles. The charged particles become trapped in magnetic belts around the Earth. When a large blast of solar wind crashes into the Earth’s magnetic field first gets squeezed and then the magnetic field lines break and reconnect.
The brea
A. Right
B. Wrong
C. Not mentioned
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If the sun has enough (26) to warm and light the whole earth, it must have enough power to do other things, (27) . Can we use the sun’s (28) energy to supply electricity, or at least to perform the function which electricity or other types of power usually perform The answer is (29) .
For example, people have for many years been using the (30) heat of the sun to cook by solar (31) which have been built with several incurred (32) reflecting the sun and focusing the heat on the cooking element. This (33) can be used like a gas or electric stove; it is more expensive to make but it doesn’t need any (34) and so costs (35) to use. Another (36) of using solar energy is in house heating.
The (37) of energy we use most is electricity, and every day more is (38)
A. stop
B. produce
C. work
D. last
