What happens during rusting of an iron nail?(1 point)
Responses
Iron and oxygen combine to form iron oxide.
Iron and oxygen combine to form iron oxide.
Sulfur and oxygen combine to form a sulfur dioxide coating.
Sulfur and oxygen combine to form a sulfur dioxide coating.
Sulfur, iron, and oxygen combine to form iron sulfoxide.
Sulfur, iron, and oxygen combine to form iron sulfoxide.
Iron and sulfur combine to form iron sulfide.
Iron and oxygen combine to form iron oxide.
What does the forward arrow in a chemical equation mean?(1 point)
Responses
The reaction is reversible.
The reaction is reversible.
The reaction proceeds slowly.
The reaction proceeds slowly.
The reaction proceeds quickly.
The reaction proceeds quickly.
The reaction yields something.
The reaction is reversible.
Which kind of reaction is photosynthesis?(1 point)
Responses
light-independent
light-independent
endothermic
endothermic
exothermic
exothermic
temperature-independent
light-independent
Photosynthesis requires which kind of energy?(1 point)
Responses
heat energy
heat energy
thermal energy
thermal energy
mechanical energy
mechanical energy
light energy