Front

What is the Big Bang Theory?

Back

The Big Bang Theory is the leading explanation for the origin of the universe, suggesting it began as a singularity approximately 14 billion years ago and has been expanding ever since.

Front

How long ago do we think the Big Bang occurred?

Back

Approximately 14 billion years ago.

Front

What is cosmic microwave radiation?

Back

Cosmic microwave radiation is the afterglow of the energy from the Big Bang, filling the universe and detectable today as a faint background radiation.

Front

What happens to light when an object in space moves away from an observer?

Back

The light experiences a red shift, meaning its wavelength is stretched, making it appear redder.

Front

Is the sun on fire?

Back

No, the sun is not on fire; it undergoes nuclear fusion, converting hydrogen into helium, which produces energy.

Front

What increases as temperature is added to a substance?

Back

The amount of energy in the substance increases.

Front

What is red shift?

Back

Red shift is the phenomenon where light from an object moving away from an observer shifts to longer wavelengths, appearing redder.

Front

What is the significance of cosmic microwave background radiation?

Back

It provides evidence for the Big Bang Theory and helps scientists understand the early universe.

Front

What is the Doppler effect?

Back

The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.

Front

What is nuclear fusion?

Back

Nuclear fusion is the process by which two light atomic nuclei combine to form a heavier nucleus, releasing energy.