Reading Explorer Unit 4A

What is the name of the field of science that studies space?

• gastronomy

• astrology

• astronomy

• astronomer

Put these in order from smallest to largest: planet, star, universe, moon, solar system, galaxy

• moon, planet, star, galaxy, solar system, universe

• planet, star, universe, moon, solar system, galaxy

• moon, planet, star, solar system, galaxy, universe

• universe, galaxy, solar system, star, planet, moon

Earth is the third _____ from the sun.

• moon

• solar system

• star

• planet

Mars is the _____ planet from the sun.

• first

• second

• third

• fourth

What do the astronomers Seth Shostak and Alexandra Barnett believe about intelligent alien life?

• It probably doesn't exist.

• It probably exists, but we will never be able to contact them.

• It probably exists, and we will contact them soon.

• It probably exists, and we may contact them in the distant future.

Why do Seth Shostak and Alexandra Barnett believe intelligent life exists on other planets?

• because the universe is so big

• because the universe is so old

• because every star has a planet like Earth

• because aliens live on Mars

How old do scientists believe the universe is?

• about 12,000,000 years

• about 12,000,000,000 years

• about 12,000,000,000,000 years

• about 1.2 B years

How many planets did the Kepler Space Telescope discover since its launch in 2009?

• over 2,600

• over 2.6 Million

• over 2,600,000

Because of the great number of planets discovered by the Kepler Space Telescope scientists now think there are probably more planets than stars in our galaxy.

• True

• False

• Answer Not Given (NG)

What is the name of our galaxy?

• The Silky Way

• The Milky Way

• The Galaxy Quest

• The Samsung Galaxy