The Universe and Big Bang

Cosmic Microwave Background Radiation is a form of _________.

• Matter

• Energy

• Visible Light

• Water

Answer explanation

Cosmic Microwave Background Radiation is a form of energy. This radiation is a remnant from the early universe and is a form of electromagnetic radiation, which is categorized as energy, not matter, visible light, or water.

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Astronomer Edwin Hubble discovered (in 1929) that all galaxies are

• rushing toward each other.

• getting larger by galactic mergers

• rushing away from each other.

• spiral in shape

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The scientific theory describing the origin of all space, time, matter, and energy approximately 13.7 billion years ago from the expansion of a singular point of extremely high density and temperature (singularity) is called ______________________________________________

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The remnant heat (electromagnetic radiation) left over from the Big Bang

• Red - Shift

• Cosmic Microwave Background Radiation

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The ________________________ is all the matter, energy, time and space) that exists. Made up of galaxies which contain stars and planetary systems

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Where the wavelength of the light is stretched, so the light is seen as ‘shifted’ towards the red part of the spectrum

• Red - Shift

• Cosmic Microwave Background Radiation

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What is the first thing that happened in the Big Bang Theory?

• After one second, the new universe expanded and cooled, forming protons and neutrons.

• Under extremely hot and dense conditions, a single point called a singularity began to expand, causing a sudden, massive explosion.

• Hydrogen atoms were forced closer together under the force of gravity, forming stars through nuclear fusion.

• Gravity began to sweep matter into dense masses, which became galaxies.

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Scientists have observed that the light emitted from faraway galaxies is shifted toward the red on the electromagnetic spectrum compared to similar galaxies that are closer. This is called a redshift. How does this data support the idea that the universe began with a period of rapid expansion and is continuing to expand?

•  The redshift indicates the types of matter in the galaxies.

• The redshift indicates the age of the galaxies.

• The redshift indicates that the galaxies are getting closer together.

• The redshift indicates that the galaxies are moving away rapidly.

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How old do scientists think the Universe is?

• 4.5 billion years old

• 13.8 billion years old

• 24,000 years old

• 500 million years old

Most scientists believe the Big Bang Theory explains which of the following questions?

• How our universe began

• How our planets and moons formed

• How the sun turns hydrogen into helium

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