2024 Fall Semester Final Review - Part 2

Front

What is the Big Bang Theory?

Back

The Big Bang Theory is the leading explanation for the origin of the universe, proposing that it began as a singularity approximately 13.8 billion years ago and has been expanding ever since.

Front

What is cosmic microwave background radiation?

Back

Cosmic microwave background radiation is the afterglow radiation from the Big Bang, filling the universe and providing evidence for the Big Bang Theory.

Front

What does redshift in light from distant galaxies indicate?

Back

Redshift indicates that galaxies are moving away from us, suggesting that the universe is expanding.

Front

What is the estimated age of the Earth?

Back

The estimated age of the Earth is about 4.5 billion years.

Front

What is the significance of the abundance of Hydrogen and Helium in the universe?

Back

The abundance of Hydrogen and Helium supports the Big Bang Theory, as these elements were formed in the first few minutes after the Big Bang.

Front

What is an independent variable in an experiment?

Back

An independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Front

What is a dependent variable in an experiment?

Back

A dependent variable is the factor that is measured or observed in an experiment, which is affected by changes in the independent variable.

Front

What is wavelength?

Back

Wavelength is the distance between successive crests of a wave, typically measured in meters.

Front

What are rarefactions in a wave?

Back

Rarefactions are the regions in a longitudinal wave where the particles are spread apart, resulting in lower pressure.

Front

What are compressions in a wave?

Back

Compressions are the regions in a longitudinal wave where the particles are close together, resulting in higher pressure.