Question

match each word to its definition.
energy stored in a molecule
a. chemical energy
sugar that organisms use for energy
b. glucose
group of atoms joined by covalent bonds
c. product
substance created during a chemical reaction
d. molecule
substance that enters a chemical reaction
e. reactant

Explanation:

1. For "energy stored in a molecule", the definition matches "chemical energy" (a) as chemical energy is energy stored in chemical bonds of molecules.
2. "Sugar that organisms use for energy" is "glucose" (b) since glucose is a primary energy - giving sugar for organisms.
3. "Group of atoms joined by covalent bonds" is the definition of a "molecule" (d) as molecules are formed by covalent bonding of atoms.
4. "Substance created during a chemical reaction" is a "product" (c) as products are the end - result of a chemical reaction.
5. "Substance that enters a chemical reaction" is a "reactant" (e) as reactants are the starting substances in a chemical reaction.

Answer:

• energy stored in a molecule: a. chemical energy
• sugar that organisms use for energy: b. glucose
• group of atoms joined by covalent bonds: d. molecule
• substance created during a chemical reaction: c. product
• substance that enters a chemical reaction: e. reactant