Unit 4: Earth in the Solar System & Space

Short sound waves are:

• high pitched

• low pitched

• medium pitched

• without pitch

Tags

NGSS.HS-PS4-1

When a noise is moving away from an observer:

• The energy is lower

• The noise is smoother

• The pitch is higher

• The pitch is lower

Tags

NGSS.HS-PS4-1

What happens to frequency when wavelength decreases?

• decreases

• increases

• no change

• random changes

Tags

NGSS.HS-PS4-1

The distance that light travels in one year:

• a light year

• a quantum year

• a stellar year

• one million kilometers

Which star stage does our sun belong to?

• Main Sequence

• Red Giant

• Supergiant

• White Dwarf

Which star stage is generally the hottest?

• Main Sequence

• Red Giant

• Supergiant

• White Dwarf

What color stars are the coolest?

• blue

• green

• red

• yellow

The star, Proxima Centauri, has a luminosity of less than 1. What does that mean?

• It is brighter than the sun

• It is cooler than the sun

• It is dimmer than the sun

• It is hotter than the sun

In the H-R diagram, what happens as we move to the left?

• Stars get brighter

• Stars get colder

• Stars get hotter

• Stars get larger

What characteristics are used to classify stars?

• brightness, color, and temperature

• conductivity, density, and luster

• distance, malleability, and viscosity

• flammability, reactivity, and weight