Astronomy

The Sun is classified as

• a solar system

• a star

• a Sun

_____________ are made of gases, dust, and billions of stars and have different shapes.

• Universe

• galaxies

• solar systems

• planets

Because distances in space are so great that conventional numbers are too large to work with, astronomers use a unit of measurement called

• dark years

• leap years

• light years

• hight years

There is evidence to support that scientists are able to estimate the age of the universe in two ways. What are these two methods?

• Looking for the oldest stars, and measuring the Universes rate of expansion.

• Looking for the oldest stars, and measuring the Universes rate of reduction.

• Looking for the youngest stars, and measuring the Universes rate of expansion.

• Looking for the youngest stars, and measuring the Universe rate of expansion.

As stars begin to reach the end of their life cycle their levels of

• hydrogen increase.

• hydrogen decreases.

• hydrogen stays the same.

• helium decreases.

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

When stars or galaxies increase their distance, they are said to be red shifted. How would you describe the lightwaves of a redshift?

• high frequency, compressed wave lengths

• low frequency, stretched wave lengths

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-1

How would you describe galaxies and the Universes rate of expansion?

• Rate of expansion is constant.

• As distance decreases, speed increases.

• As distance increases, speed decreases.

• As distance increases, speed increases.

How would you classify an object with the following characteristics. Found orbiting between Mars and Jupiter, made of rock, dust and metals, and revolves around the Sun.

• Asteroid

• Comet

• Meteor

• Moon

Tags

NGSS.MS-ESS1-3

Meteors are chunks of rock that

• land on a moon or planets surface.

• is orbiting in space around the Sun.

• burns up as it enters Earth's atmosphere.

This is an image of a

• meteor.

• meteorite.

• meteoroid.