How do catalysts affect a chemical reaction?(1 point)

Lower activation energy.

What happens during rusting of an iron nail?(1 point)

Responses

Sulfur and oxygen combine to form a sulfur dioxide coating.
Sulfur and oxygen combine to form a sulfur dioxide coating.

Iron and sulfur combine to form iron sulfide.
Iron and sulfur combine to form iron sulfide.

Iron and oxygen combine to form iron oxide.
Iron and oxygen combine to form iron oxide.

Sulfur, iron, and oxygen combine to form iron sulfoxide.

Iron and oxygen combine to form iron oxide.

Question

What does the forward arrow in a chemical equation mean?(1 point)
Responses

The reaction proceeds quickly.
The reaction proceeds quickly.

The reaction proceeds slowly.
The reaction proceeds slowly.

The reaction yields something.
The reaction yields something.

The reaction is reversible.

The reaction yields something.

Which kind of reaction is photosynthesis?(1 point)

Responses

endothermic
endothermic

exothermic
exothermic

light-independent
light-independent

temperature-independent

Endothermic.

Which option describes an enzyme? (1 point)

Responses

a specialized carbohydrate that changes during a chemical reaction
a specialized carbohydrate that changes during a chemical reaction

a specialized protein that changes during a chemical reaction
a specialized protein that changes during a chemical reaction

a specialized protein that helps chemical reactions to occur
a specialized protein that helps chemical reactions to occur

a specialized carbohydrate that helps chemical reactions to occur

A specialized protein that helps chemical reactions to occur.