2nd 9 Weeks Test

Which 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

The steady state theory suggested that the universe has always existed and maintains the same structure. This theory was later discredited due to which discovery?

• • The amount of hydrogen in the universe is extremely high to remain steady.

• • The scale of the universe is much greater than was previously understood.

• • The shift of light toward longer wavelengths indicates that most galaxies are moving away from Earth.

• • More powerful telescopes have made observations of planets orbiting stars other than the Sun.

Tags

NGSS.HS-ESS1-2

A red giant star differs from main sequence stars because it

• • burns at a cooler temperature.

• • is always larger than other suns.

• • has greater density and gravity.

• • fuses hydrogen to make helium.

According to the modern theory of the universe’s origin, which graph best shows the trend in the volume of the universe over time?

• 
• 
• 
• 

Tags

NGSS.HS-ESS1-2

Based on the Doppler effect, the electromagnetic waves reaching Earth from a galaxy that is moving away from Earth would be expected to

• • experience an increase in their amplitude.

• • experience an increase in frequency.

• • experience a decrease from transverse waves to longitudinal waves.

• • experience a decrease in frequency.

Tags

NGSS.HS-PS4-1

Stars appear to be blue, white, yellow, and red, even without the aid of a telescope. What causes the different colors of the stars?

• • the surface temperature

• • the distance from Earth

• • the distance from the Sun

• • the gases that compose the star

Astronomers have found low-energy background radiation in every part of the sky that they have studied. This radiation is taken as evidence of energy remaining from which event?

• • supernovas

• • the big bang

• • collisions of galaxies

• modern decay of unstable atoms

Tags

NGSS.HS-ESS1-2

A modern theory of the origin of the universe proposes that the first atoms formed were primarily atoms of which element?

• iron

• carbon

• helium

• hydrogen

Tags

NGSS.HS-ESS1-2

Spring tides occur during which lunar phases?

• • first quarter and last quarter

• • full moon and new moon

• • when the Moon is waxing

• • when the Moon is waning

Tags

NGSS.MS-ESS1-1

A student ties a string around a weight and swings the weight in a circle around her body. If the student represents the Sun and the weight represents Earth, what does the string represent?

• gravity

• radiation

• electricity

• magnetism

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4