Which of these forms when air moves in the directions shown by the arrows in the diagram?
WARM Air
Rises
COOL Air
Falls
WARM
(Low Pressure)
COOL
(High Pressure)
WATER
LAND
A. Sea breeze
ОО
B. Valley breeze
C. Mountain breeze
O D. Land breeze

When water freezes, it . contracts expands

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

1. an enzyme is considered a(n) because it speeds up a chemical reaction without being used up.2. in a catalyzed reaction, a reactant is often called a(n) . an enzyme is specific because the shape of its matches only particular reactants.4. an enzyme speeds up reactions by lowering the . the between an active site and its substrate often strains bonds and the reaction proceed.6. a( , which is often a vitamin, binds to an enzyme and plays a role in catalysis.7. high temperatures or changes in ph can an enzyme, causing it to lose its shape and biological activity.