RE1U4A

Reading Explorer 1

Unit 4A

Multiple Choice

Mars, Jupiter, and Earth are all______:

• planets

• galaxy

• telescope

• astronomer

Multiple Choice

A(n)______ is a very

large group of stars, gas, and dust.

• planets

• galaxy

• telescope

• astronomer

Multiple Choice

A(n) ______ makes

distant objects appear closer.

• planets

• galaxy

• telescope

• astronomer

Multiple Choice

A(n)______ studies

stars and other objects in space.

• planets

• galaxy

• telescope

• astronomer

Multiple Choice

Skim the passage quickly. What do

Shostak and Barnett think?

• a. We might soon communicate with

  beings from space.

• b. We will probably never find

  intelligent life outside Earth.

• c. We have probably already

  contacted beings from space.

Multiple Choice

What is the main purpose of this reading?

• to discuss how life probably started on Earth

• to explain why we might find intelligent life outside of Earth

• to describe what life on other planets might look like

Multiple Choice

Which possible reason for the existence of intelligent life is NOT mentioned?

• Some planets that circle stars might be similar to Earth.

• The universe is too old to have just one planet with intelligent life.

• Some other planets in the Milky Way have water.

Multiple Choice

According to the reading passage, why was it difficult to search for signs of

intelligent life in the past?

• Telescopes weren't powerful enough.

• The distance between planets was too great.

• There were too few trained astronomers.

Multiple Choice

What does life forms in the last sentence of the passage mean?

"He predicts that we will make contact with other life forms in our universe within the next 20 years."

• messages

• beings

• planets

Multiple Choice

Why does Shostak think we will make contact with intelligent life within the

next 20 years?

• We will have better technology to receive their messages.

• Bigger telescopes will identify more planets like Earth.

• Intelligent life will finally receive messages that we send to them.

Multiple Choice

What tool has been used to discover

billions of galaxies?

• The Hubble Telescope

• The Kepler Telescope

• The Palomar Telescope

• The Galileo Telescope

Multiple Choice

Does Shostak think that beings from other

planets have visited Earth?

• yes, because the distance between planets is too

  great

• no, because the distance between planets is too

  short

• yes, because the distance between planets is not long enough

• no, because the distance between planets is too

  great

Multiple Choice

Besides radio signals, what else could other

life forms use to contact us?

• flashes of light

• monsters

• asteroids

• aliens

Multiple Choice

Is there life on other planets? Scientists use different methods to try to answer this

question. Some use very_____radio telescopes.

• powerful

• whole

Multiple Choice

They hope to receive messages from intelligent life on distant planets. Other scientists only ______ for life in our solar system.

• search

• contact

Multiple Choice

But they aren't looking for intelligent life—they

want to ______ any possible life forms.

• circle

• identify

Multiple Choice

To do this, they test whether

conditions on a planet would ______ any kind of life...

• allow

• contact

Multiple Choice

To do this, they test whether conditions on a planet would allow any kind of life to ______.

• exist

• search

Multiple Choice

We measure distance in_____.

• kilometers (km)

• kilograms (kg)

Multiple Choice

Some examples of tools are______.

• monkeys and dolphins

• cell phones and laptops

Multiple Choice

If you contact someone, you___________ them.

• meet or communicate with

• research and write about

Multiple Choice

If you have lived in a place your whole life,

you have lived there________of your life.

• some

• all

Multiple Choice

If a spaceship circles a planet, it___________

the planet.

• goes around

• lands on

Multiple Choice

Moon dust can be ______

ful and can damage our DNA.

• care

• harm

• power

• wonder

Multiple Choice

Astronomers need to be very ______ful with the expensive equipment they use.

• care

• harm

• power

• wonder

Multiple Choice

The Falcon Heavy rocket is extremely______ful. It can carry a load of 60,000 kg.

• care

• harm

• power

• wonder