Which unit of measurement is used to measure distances within our solar system?

• inches

• kilometers

• miles

• Astronomical units

The distance light can travel in one year is ______________

• 15,000 kilometers

• 1 light-year

• 15 Astronomical Units

• 6,000 miles

What unit of measurement is used to calculate distance in our universe?

• astronomical units

• kilometers

• light years

• parsecs

True or False: The universe is expanding.

• True

• False

True or False: Scientist still consider the sun the center of the universe

• True

• False

Wavelengths of light appear to become longer during a ____________.

• yellow drift

• blue slide

• red shift

• white sprinkle

A popular theory of the origin of the universe is _____________

• adaptive structuration theory

• heliocentric theory

• theory of relativity

• big bang theory

What element is the most plentiful in the universe?

• helium

• hydrogen

• carbon

• oxygen

a location where hydrogen atoms fuse into helium atoms, releasing large amounts of light and gamma radiation.

• quasar

• planet

• star

• nebula

Area in the universe that is characterized by a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette.

• nebula

• radon field

• galaxy

• star