Chemistry of Life/ Carbon Compounds. Chapter 10, Lessons 1 & 2. Elements of Life. Biomass is the total mass of all living matter on Earth, which is made up mostly of the elements sulfur, phosphorus, oxygen, nitrogen, carbon, and hydrogen (SPONCH)
Chemistry of Life/ Carbon Compounds
Chapter 10, Lessons 1 & 2
Individual water molecules act like magnets.
The positive end attracts the negative end of other water molecules.
This weak bonding is known as hydrogen bonding.
1) Which is one of the six elements that make up most of Earth’s biomass?
2) Water is a polar molecule because ____.
Ait has a negative charge
Bit has a covalent bond with unequal sharing of the electrons
Cit has a positive charge
Dit has an ionic bond
3) Where do plants obtain nitrogen for cellular activities?
Afrom the air
Bfrom decaying organisms
Cfrom animal waste
Dfrom nitrogen-fixing bacteria in the soil
4) Which of the following is the amino group?
5) Which type of molecule is like a flat piece of paper?
6) How many possible covalent bonds can carbon form?