8th Grade_Reading Comprehension_Origins of the Universe

Front

What is the Big Bang Theory?

Back

The Big Bang Theory is the scientific explanation that the universe began from a small, dense point and has been expanding ever since.

Front

What evidence supports the Big Bang Theory?

Back

One piece of evidence is the cosmic microwave background radiation, which is a weak signal detected throughout the universe.

Front

What does redshift in light from a galaxy indicate?

Back

Redshift indicates that the galaxy is moving away from Earth.

Front

How old is the universe according to the Big Bang Theory?

Back

The universe is approximately 13.8 billion years old.

Front

What is cosmic microwave background radiation?

Back

Cosmic microwave background radiation is the afterglow of the Big Bang, filling the universe and providing evidence of its early state.

Front

What is the significance of the expansion of the universe?

Back

The expansion of the universe suggests that it was once much smaller and denser, supporting the Big Bang Theory.

Front

What is a galaxy?

Back

A galaxy is a massive system of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity.

Front

What is the observable universe?

Back

The observable universe is the part of the universe that we can see and measure, limited by the speed of light.

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, including visible light, radio waves, and gamma rays.

Front

What does it mean for the universe to be cooling down?

Back

The universe cooling down means that it is losing energy over time, which is a result of its expansion.