Universe and galaxies Q2 Assessment

Astronomers believe that the Milky Way galaxy has a diameter of 100,00 light years. This distance is equivalent to

• the distance the Sun travels in 100,000 years.

• the distance light travels through a vacuum in 100,000 years.

• the time it would take a spaceship to travel 100,000 kilometers.

• the time it takes Earth or a star to travel 100,000 kilometers.

Tags

NGSS.MS-ESS1-3

The light year is used to describe distance between Earth and stars other than the Sun because the astronomical unit is

• too small.

• too large.

• not accurate.

• not well defined.

The distance from earth to the sun is about 150,000,000 km. What abbreviation does scientists use to describe this distance

• meters per second (m/s)

• light-year (lt-yr)

• astronomical unit (au)

• electromagnetic unit (EMU)

During a presentation on astronomy, Professor Williams discussed various measurements in space. She was referring to which objects when she talked about how astronomical units (au) were determined?

• the Sun and Earth

• the Moon and Earth

• the inner and outer planets

• the Sun and the closest star

Tags

NGSS.MS-ESS1-3

What measurement is best expressed in light-years?

• the rate at which the universe is expanding

• the distance between stars in the Milky Way

• the time it takes for planets to complete their orbits

• the speed at which light travels through the universe

The distance between the sun and the next closest star, Proxima Centauri, is most accurately measured in

• magnitudes.

• light-years.

• perigees.

• red shifts.

Scientists have collected data about many galaxies, including the Milky Way galaxy. What makes the Milky way galaxy difficult to observe from Earth?

• Earth is located inside the Milky Way galaxy.

• The Milky Way galaxy absorbs more light than it emits.

• The Milky Way galaxy is too distant for detailed observations.

• Earth is moving in the opposite direction of the Milky Way galaxy.

Structures in the universe are grouped into large systems, each of which are made up of smaller systems. Which of the following is the largest system of which Earth is just a very small part?

• Jovian planets

• Halley’s comet

• Milky Way galaxy

• Orion’s belt

Tags

NGSS.MS-ESS1-2

A light-year is the measure of how far light can travel in one year. How long has the light from a star 125,000 light-years away been travelling to reach Earth?

• 12.5 years

• 125 years

• 125,000 years

• 125,000,000 years

Tags

NGSS.HS-PS4-3

What is evidence that the universe is expanding?

• the presence of dark matter

• redshift of light from distant galaxies

• constant speed of light from every perspective

• emission of high-energy gamma rays by distant objects

Tags

NGSS.HS-ESS1-2