IB Physics Cosmology

Which of the following ideas make up the Big Bang Theory?

• The Universe is currently expanding.

• The Universe was once hot and dense.

• The Universe has a finite size.

• The Universe is unbounded.

Tags

NGSS.HS-ESS1-2

According to the big bang theory, the universe began as an explosion and is still expanding. This theory is supported by observations that the stellar spectra of distant galaxies show a

• concentration in the yellow portion of the spectrum

• concentration in the green portion of the spectrum

• shift toward the blue end of the spectrum

• shift toward the red end of the spectrum

Tags

NGSS.HS-ESS1-2

In which list are celestial features correctly shown in order of increasing size?

• galaxy, solar system, universe, planet

• solar system, galaxy, planet, universe

• planet, solar system, galaxy, universe

• universe, galaxy, solar system, planet

Cosmic Background Radiation is...

• light pollution that stops you seeing stuff through telescopes

• The light from our sun

• The leftover light energy from the big bang

• Light emitted when the universe was really young and first became able to transmit light.

Tags

NGSS.HS-ESS1-2

Olber's Paradox states that if the universe is infinite in size and infinite in age, then...

• The universe must be expanding

• The night sky should be full of light

• The universe must be contracting

• Aliens must exist

Which of these waves has the longest wavelength?

• X-ray

• Gamma

• Radio

• Visible light

Tags

NGSS.HS-PS4-1

How old do we estimate the universe to be?

• 13.8 billion years old

• 25 million years old

• 13.8 million years old

• 8 billion years old

Tags

NGSS.HS-ESS1-2

Which of these is NOT evidence of the Big Bang?

• Red shift of the light from distant galaxies

• CMBR

• The doppler shift of the Andromeda galaxy

• The ratio of Primordial elements

Tags

NGSS.HS-ESS1-2

Extremely distant galaxies are moving away from us at ___

• half the speed of light

• almost the speed of light

• the speed of light

• speeds faster than light

Tags

NGSS.HS-ESS1-2

The most distant galaxies we see are now about 45 billion light years from us. We call this the ___

• radius of the observable Universe

• cosmic event horizon

• maximum isotropic distance

• cosmological constant

Tags

NGSS.HS-ESS1-2