Answer the following question given this paragraph: Chemistry is the study of the structure, properties, and interactions of matter. Important concepts in chemistry include physical changes, such as water freezing, and chemical reactions, such as fireworks exploding. Chemistry concepts can answer all the questions on the left page of the notebook in Figure below . Do you know the answers?. Q: What is the study of structure, properties, and interactions of matter? A:
OPTIONS:
- petrology
- biology
- geology
- chemistry

Answer: chemistry

Answer the following question given this paragraph: Enzymes increase the rate of chemical reactions by reducing the amount of activation energy needed for reactants to start reacting. One way this can happen is modeled in the Figure below . Enzymes aren't changed or used up in the reactions they catalyze, so they can be used to speed up the same reaction over and over again. Each enzyme is highly specific for the particular reaction is catalyzes, so enzymes are very effective. A reaction that would take many years to occur without its enzyme might occur in a split second with the enzyme. Enzymes are also very efficient, so waste products rarely form. Q: What can be used to accelerate the rate at which chemical reactions occur? A:
OPTIONS:
- hormones
- protein
- components
- enzymes

Answer: enzymes

Answer the following question given this paragraph: Outline the forces that act on particles in the nucleus. Q: What type of movement is caused by erosion from direct gravity? A:
OPTIONS:
- frictional movement
- normal movement
- electron movement
- mass movement

Answer:
mass movement