Expansion of the Universe

When Edwin Hubble measured the distance to other galaxies, he discovered that the galaxies

• were moving away from us

• flickered on and off

• were moving toward us

• were stationary (not moving)

Tags

NGSS.HS-ESS1-2

When a light source moves away from us, the consequent stretching out of wavelengths is known as _______.

• blueshift

• redshift

• coriolis effect

• color effect

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

This element was first discovered in our Sun by analyzing the absorption lines.

• Helium

• Hydrogen

• Oxygen

• Carbon

Tags

NGSS.HS-ESS1-2

A redshift indicates that the object is moving slowly towards us.

• True

• False

Tags

NGSS.HS-ESS1-2

The universe is expanding in three-dimensions of space.

• True

• False

Tags

NGSS.HS-ESS1-2

What is redshift?

• Absorption bands are shifted toward the red end of the spectrum

• Sound waves are moving away from the observer

• Absorption bands are shifted toward the blue end

• All of the above

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Which is an example of the Doppler Effect?

• Doppler Effect is found only in sound waves

• As an object moves toward you, the waves spread further apart, and vice versa

• As an object moves toward you, the waves pack closer together, and vice versa

• All of the above

Tags

NGSS.HS-PS4-1

As the universe expands it is the ___________ that is expanding.

• Space between the galaxies

• Entire universe and everything in it

• Space within the galaxies

• Space within atoms and molecules

As the universe expands, the galaxies are also expanding.

• True

• False

Tags

NGSS.HS-ESS1-2