Question

1. match the correct term to complete the sentence. increasing ____ increases reaction rates in solid substances by exposing more matter. choices: catalyst, surface area 6. match the correct term to complete the sentence. a(n) ____ increases reaction rates by decreasing the need for energy in a reaction. choices: surface area, catalyst

Explanation:

Question 5:

Step1: Analyze the sentence

The sentence is about increasing reaction rates in solid substances by exposing more matter. We know that increasing surface area exposes more of the solid's particles to react, which increases reaction rates. A catalyst works by lowering activation energy, not by exposing more matter. So the correct term should be "surface area".

Step2: Match the term

From the choices (catalyst, surface area), "surface area" fits the description of exposing more matter in solids to increase reaction rates.

Step1: Analyze the sentence

The sentence is about a substance that increases reaction rates by decreasing the need for energy (activation energy) in a reaction. A catalyst is defined as a substance that speeds up a reaction by lowering the activation energy (the energy needed to start the reaction). Surface area affects reaction rates by exposing more matter, not by decreasing energy needs.

Step2: Match the term

From the choices (surface area, catalyst), "catalyst" fits the description of decreasing the energy need (activation energy) to increase reaction rates.

Answer:

surface area

Question 6: