Answer:
I think the answer would be to to write observations about what the sky looks like or to count the number of visible stars in the sky.
A secondary source is anything written after the fact
Answer:
Enzymes are named according to <em>the reaction they catalyze</em>. Polymers are made of subunits joined together by different types of bonds, forming a macromolecule.
Hydrolases are used by the organism to catalyze the hydrolysis of polymers so they can be easily manipulated as monomers. Hydrolysis means reacting with water, water can break the bonds of different polymers turning it into its constitutive monomers.
The heat from hotter object goes to the cooler object. when they reach the same temperature the heat flow will stop.
