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Unit 1 READING 1
T he sun is a star. About 75 percent
of the sun is made up of hydrogen,
and the rest is helium. These gases keep
exploding and create light and energy.
Without the sun, nothing on the Earth
can survive. Though the sun is the
largest object in our solar system, it
looks very small. That’s because we’re
so far away from it roughly 150 million km away. We’re so far away that it
even takes eight minutes for light to reach us from the sun.
The sun is about four and a half billion years old. When the sun is ready to
die, it will become a giant red mass. Further, it will get so large that it will
swallow the nearest planets. All of the planets in our solar system move
around the sun. It takes 365 days for the Earth to go around the sun one
time. That makes one year. The surface of the sun is about 5,700 degrees
Celsius, and the core reaches 15 million degrees.
English Usage
• keep + -ing : to continue doing something or to do the same thing many times
He kept working until midnight.
• so + adjective + that + subject + verb : used to mention a result
We were so angry that we asked to see the manager.
110 Chapter 6 Science & Technology
T he sun is a star. About 75 percent
of the sun is made up of hydrogen,
and the rest is helium. These gases keep
exploding and create light and energy.
Without the sun, nothing on the Earth
can survive. Though the sun is the
largest object in our solar system, it
looks very small. That’s because we’re
so far away from it roughly 150 million km away. We’re so far away that it
even takes eight minutes for light to reach us from the sun.
The sun is about four and a half billion years old. When the sun is ready to
die, it will become a giant red mass. Further, it will get so large that it will
swallow the nearest planets. All of the planets in our solar system move
around the sun. It takes 365 days for the Earth to go around the sun one
time. That makes one year. The surface of the sun is about 5,700 degrees
Celsius, and the core reaches 15 million degrees.
English Usage
• keep + -ing : to continue doing something or to do the same thing many times
He kept working until midnight.
• so + adjective + that + subject + verb : used to mention a result
We were so angry that we asked to see the manager.
110 Chapter 6 Science & Technology
