Mass is the amount of what in an object

• Density
• Space
• Matter

How does the sun creates energy?

• fusion of Hydrogen nuclei to Helium in the core of the sun
• fission of Hydrogen nuclei to Helium in the core of the sun
• Fusion of Helium nuclei to Hydrogen in the core of the sun

How are fusion and fission different?

• Fusion splits nuclei, fission combines nuclei
• Fusion combines nuclei, fission splits nuclei
• they are not different
• they both create energy

What allows you to feel the warmth of the sun on your skin?

• Visible light is absorbed by our skin
• Light is reflected off our skin
• UV is reflected off our skin
• UV is absorbed by our skin

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

Which of the following is a negatively charged subatomic particle?

• Electron
• Proton
• Neutron
• Quark

What are the 3 particles that make-up the atom?

• protons, neutrons, and isotopes
• neutrons, isotopes, and electrons
• positives, negatives, and electrons
• protons, neutrons, and electrons

This produces all of Earth's energy

• atmosphere
• Sun
• Moon

How long does it take the Sun's energy to reach Earth, once it is emitted from the photosphere?

• 100,000 years
• 24 hours
• 28 days
• 8 minutes

Energy in stars, including our Sun, is produced by

• nuclear fission
• nuclear fusion
• burning gases