Science Study Guide for Final Exam

A process that occurs when the nuclei of several atoms combine into one larger nucleus is called what?

• Nuclear fusion
• Atomic fusion
• Nuclear fission
• Nuclear fusion reaction

What is the apparent surface of a star called?

• chromosphere
• corona
• photosphere
• nucleus

The wide, outermost layer of a star’s atmosphere is called what?

• photosphere
• corona
• exosphere
• thermosphere

A star becomes a main-sequence star as soon as it begins to fuse these two elements into its core.

• Carbon and Oxygen
• Oxygen and Nitrogen
• Helium and Lithium
• Hydrogen and Helium

An enormous explosion that destroys a star is known as a what?

• Supernova
• Black hole
• Galaxy burst
• Cosmic eruption

A dense core of neutrons that remains after a supernova is known as what?

• proton star
• electron star
• photon star
• neutron star

How many galaxies does the universe contain?

• 100 billions

• 150 billion

• 50 billion

• 300 billion

Our solar system is found in which galaxy?

• Milky Way
• Andromeda
• Milky Way Bar

• Triangulum

The theory stating that the universe began from one point billions of years ago – and has been expanding ever since- is known as what?

• Quantum Theory
• Steady State Theory
• String Theory
• Big Bang Theory

Anything that has mass and takes up space is known as what?

• Volume
• Matter
• Energy
• Density