Question 1

Question

A) How do catalysts affect a chemical reaction? (1 point)
increase activation energy
provide activation energy
lose activation energy
lower activation energy
Question 2
A) What happens during rusting of an iron nail? (1 point)
Iron and sulfur combine to form iron sulfide.
Sulfur and oxygen combine to form a sulfur dioxide coating.
Iron and oxygen combine to form iron oxide.
Sulfur, iron, and oxygen combine to form iron sulfoxide.
Question 3
A) Which kind of reaction is photosynthesis? (1 point)
light-independent
exothermic
temperature-independent
endothermic
Question 4
A) Photosynthesis requires which kind of energy? (1 point)
mechanical energy
light energy
thermal energy
heat energy
Question 5
A)
Use the image below to answer the question.
Does this graph show an endothermic or exothermic reaction?
(1 point)
Endothermic, because it takes a lot of energy to cause the reaction to occur.
Exothermic, because it takes a lot of energy to cause the reaction to occur.
Exothermic, because the products are at a lower energy state than the reactants.
Endothermic, because the products are at a lower energy state than the reactants.

Answer 1

Here are the answers to your questions:

Question 1: A) How do catalysts affect a chemical reaction?

• Correct Answer: lower activation energy

Question 2: A) What happens during rusting of an iron nail?

• Correct Answer: Iron and oxygen combine to form iron oxide.

Question 3: A) Which kind of reaction is photosynthesis?

• Correct Answer: endothermic

Question 4: A) Photosynthesis requires which kind of energy?

• Correct Answer: light energy

Question 5: A) Does this graph show an endothermic or exothermic reaction?

• Correct Answer: Exothermic, because the products are at a lower energy state than the reactants. (Note: This answer assumes the graph shows products at a lower energy compared to reactants.)

Make sure to verify the information from corresponding material for accuracy!