Exploring the Chemistry of Life's Building Blocks

Which subatomic particle orbits the nucleus of an atom?

• Photon

• Neutron

• Proton

• Electron

What charge do protons carry?

• Negative

• No charge

• Neutral

• Positive

Which subatomic particle is neutral?

• Neutron

• Proton

• Electron

• Photon

What percentage of biological matter is made up of carbon, oxygen, hydrogen, and nitrogen?

• 96%

• 75%

• 100%

• 50%

How many bonds can a carbon atom form?

• Two

• Five

• Four

• Three

What is NASA's motto for the search for extraterrestrial life?

• Discover new worlds

• Explore the stars

• Follow the water

• Seek the unknown

What is the molecular structure of water?

• O2

• CO2

• H2

• H2O

Why is water considered a polar molecule?

• It has no charge

• It is neutral

• It has slightly positive and negative ends

• It has a uniform charge

What makes water a universal solvent?

• Its pH level

• Its density

• Its polarity

• Its temperature

Which end of a water molecule is negatively charged?

• Oxygen

• Neither end

• Hydrogen

• Both ends