Question

1. what is a satellite?

a. any object affected by earths gravitational pull
b. a manmade object that allows us to communicate or observe our environment
c. any object that revolves around a planet in a circular or elliptical path
d. a network of 24 objects in space that help people determine their location

1. what causes satellites to remain in orbit above earth?

a. satellites achieve a balance between gravity and their velocity that keeps them in orbit.
b. satellites reach their escape velocity with the help of scientists and engineers.
c. satellites have a circular or elliptical orbit.
d. gravity pulls satellites sideways around earths curved surface.

1. we depend on satellites for many of our communication needs.

what evidence from the text supports this conclusion?
a. the military has spy satellites to help them peek in on other people around the world.
b. satellites allow us to use the phone, internet, television, and radio.
c. earths gravitational pull on an object weakens the farther away it is from the planets surface.
d. isaac newton discovered gravity when an apple fell on his head.
read this sentence from the text.
\observation satellites are used to keep track of the weather . . . . and can be very useful for scientists in monitoring natural disasters, global warming, and pollution.\
based on this evidence, what conclusion can be made?
a. satellites cause a large amount of pollution.
b. scientists spend lots of money to build and repair satellites.
c. satellites can help us be aware of potential dangers.
d. scientists believe satellites can help us change weather patterns.

Explanation:

1. By definition, a satellite is any object that revolves around a planet in a circular or elliptical path.
2. Satellites remain in orbit because they achieve a balance between gravity and their velocity.
3. Satellites allow communication (phone, Internet, etc.), which supports the conclusion that we depend on them for communication needs.
4. Observation satellites monitor weather, natural disasters, etc., which means they can help us be aware of potential dangers.

Answer:

1. C. any object that revolves around a planet in a circular or elliptical path
2. A. Satellites achieve a balance between gravity and their velocity that keeps them in orbit.
3. B. Satellites allow us to use the phone, Internet, television, and radio.
4. C. Satellites can help us be aware of potential dangers.