Question

1. what is the main idea of this text?

a. satellites allow us to communicate easily and learn more about the world we live in.
b. earths gravity allows us to use satellites for communication and observation.
c. isaac newtons discovery of gravity has revolutionized the way we think.
d. earths escape velocity is more than 25,000 miles per hour.

1. read these sentences from the text.

\manmade satellites have all kinds of important applications. communications satellites, for instance, are satellites that are sent to orbit the earth for the purpose of sending communication signals or messages.\
as used in the text, what does the word \applications\ mean?
a. lessons
b. problems
c. mysteries
d. uses

1. choose the answer that best completes the sentence.

scientists depend on satellites for many things, ______ information about global warming and pollution.
a. otherwise
b. therefore
c. instead
d. including

Explanation:

For question 6, "applications" in the context of man - made satellites (like communication satellites) refers to their "uses". For question 7, "including" is the correct word as it shows that information about global warming and pollution is part of what scientists depend on satellites for.

Answer:

1. D. uses
2. D. including