Allelo Final Exam Review

What are the three main components that make up the Universe?

• Stars, Planets, Moons

• Dark Matter, Dark Energy, Baryonic Matter

• Dark Matter, Light Matter, Cosmic Energy

• Galaxies, Stars, Planets

What process occurs in the Sun's core to produce energy?

• Nuclear fission

• Nuclear fusion

• Combustion

• Solar conversion

What is dark matter and how do we know it exists?

• Through direct observation in telescopes

• Inferred from its gravitational effects on visible matter and radiation

• Identified in particle accelerators

• It is a theoretical concept with no empirical evidence

How does dark energy impact our universe?

• It causes the universe to expand at an accelerating rate

• It slows down universe expansion

• It has no impact on the universe

• It only affects dark matter

Which elements are involved in nuclear fusion in the Sun's core?

• Hydrogen and helium

• Helium and carbon

• Nitrogen and oxygen

• Hydrogen and nitrogen

What are sunspots?

• Cooler areas on the Sun's surface

• Hotter areas on the Sun's surface

• Magnetic field lines

• Solar flares

How long can sunspots last?

• Hours

• Days

• Weeks

• All of the above

What do sunspots reveal about the Sun's activity over time?

• They indicate a time of more energy from the sun

• They indicate a time of less energy from the sun

• They correlate with upcoming solar eclipses

• They show a weak point on the sun

Which layer of the Sun is its visible surface?

• Core

• Radiative zone

• Photosphere

• Chromosphere

What is nuclear fission?

• Combining particles

• Absorbing energy

• Projection of electrons

• Splitting particles