Physical Science: Beginning of the Universe

Front

What does the Big Bang Theory propose about the universe?

Back

The universe started with an explosion and is continuously expanding.

Front

What is the significance of the red shift in astronomy?

Back

It indicates that light from stars takes time to reach us, stretching the wavelength of light as it travels through space.

Front

What percentage of the universe is made up of matter?

Back

About 5%.

Front

What is dark matter and what percentage of the universe does it occupy?

Back

Dark matter occupies 27% of the universe and is a hypothetical form of matter that does not emit or absorb electromagnetic radiation.

Front

What is dark energy and what percentage of the universe does it occupy?

Back

Dark energy occupies 68% of the universe and is considered a catalyst for the rapid expansion of the universe.

Front

What is Olber's Paradox?

Back

It suggests that the universe is finite, as the intensity of light from stars decreases with distance.

Front

What elements were formed shortly after the Big Bang?

Back

Hydrogen (75%) and Helium (25%).

Front

What is Nuclear Fusion?

Back

The process that causes star formation, where lighter elements combine to form heavier elements.

Front

What does the Steady State Theory propose about the universe?

Back

The universe has always existed, is continuously expanding, and is constantly creating matter.

Front

What evidence contradicts the Steady State Theory?

Back

The discovery of the Cosmic Microwave Background Radiation (CMBR) and observations of distant galaxies moving away at faster speeds.