Before a chemical reaction can start energy must be absorbed by the reactants. The amount that must be absorbed to start the reaction is called the activation energy. you're right, t<span>he activation energy must be reached.</span>
Which is a size-dependent property?
A. boiling point
B. conductivity
C. density
D.Mass
I think letter D
Why?
A size dependent property is a physical property that changes when the size of an object changes.Examples of size dependent properties: Length, Width, Height, Volume, Mass.

Speed is found by your distance divided by your time
Answer:
B Wetlands may support both aquatic and terrestrial species. The site must have the presence of water, soils indicative of frequent and prolonged flooding and vegetation suited to handle flooding or saturated soils.