Grade 10 · Science · Chemistry

10th grade What makes reactions go faster worksheet

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What makes reactions go faster

Grade 10 Science Worksheet - Challenge Me

NameDate

Circle the best answer, or write your answer on the line.

A cube of side 2 cm is cut into 8 cubes of side 1 cm. What is the total surface area of the small cubes, Ari?
A cube of side 3 cm is cut into 27 cubes of side 1 cm. What is the total surface area of the small cubes, Bo?
A cube of side 4 cm is cut into 8 cubes of side 2 cm. What is the total surface area of the small cubes, Esme?
4.
Which change speeds up a reaction without raising its temperature, Jun?
- Using a catalyst
- Using bigger pieces
- Cooling it down
5.
Which setup reacts fastest: lumps at 20 °C, powder at 20 °C or powder at 40 °C, Kira?
- Powder at 20 °C
- Powder at 40 °C
- Lumps at 20 °C
6.
What does a car's catalytic converter do, Luz?
- Speeds reactions that clean the exhaust
- Makes the engine burn more fuel
- Cools the exhaust to stop it reacting
7.
Noah says a catalyst makes a reaction release more energy. Agree or disagree?
- Agree: a catalyst adds energy
- Disagree: ΔH stays the same
- Agree: faster means more heat in total
8.
Pia says each enzyme in saliva can break down only one food molecule before it is used up. Agree or disagree?
- Agree: saliva runs out of water
- Agree: an enzyme gets spent like a reactant
- Disagree: enzymes are reused
9.
Using the graph, what is the average rate from 0 to 50 s, Ren?
- 2.4 mL/s
- 1.1 mL/s
- 55 mL/s
10.
Using the graph, why is the rate from 0 to 10 s higher than from 40 to 50 s, Zee?
Use the picture in question 9.
- The clock runs faster at first
- Gas weighs less at first
- More reactant is left early on

What makes reactions go faster. Every version has 10 questions, and the answer key prints on the second page.

I can explain with collision theory why temperature, concentration, surface area and catalysts change rates.
I can find an average rate from data and between two times on a table.
I can read a rate graph: steep early, flat once reactants run out.
I can choose a change that makes a reaction faster and say what a catalyst does and doesn't change.

Standard: HS-PS1-5

reaction rate: How fast reactants are used or products form

collision theory: Particles react only when they collide with enough energy and the right angle

surface area: The exposed outside of a solid

catalyst: A substance that speeds a reaction and is not used up

enzyme: A catalyst in living things

Your child divided time by amount. A rate is amount per time: mL ÷ s.

Your child used the total since the start. A rate between two times uses the changes: Δamount ÷ Δtime.

Your child kept the first cube's surface area. Cutting it up exposes new faces, so the total area grows.

What is the most common mistake with what makes reactions go faster?

Your child divided time by amount. A rate is amount per time: mL ÷ s.

Are these 10th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

Every sheet you scan goes into your child’s record: dated, marked and ready for the year-end portfolio. Homeschool records