Grade 10 · Science · Chemistry

10th grade What makes reactions go faster worksheet

6 printable versionsBuilding Confidence10 questions · answer keyFree · no account

Level: Building Confidence · On Level · Challenge Me

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What makes reactions go faster

Grade 10 Science Worksheet - Building Confidence

NameDate

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

A reaction gives off 60 mL of gas in 30 s. What is its average rate in mL per second, Ari?
A reaction gives off 45 mL of gas in 15 s. What is its average rate in mL per second, Bo?
A reaction gives off 90 mL of gas in 60 s. What is its average rate in mL per second, Esme?
4.
Using the graph, when is the reaction fastest, Jun?
- At the start
- At 40 s
- At the very end
5.
Using the graph, why does the reaction slow down, Kira?
Use the picture in question 4.
- Time itself slows down
- Reactants are being used up
- The gas made is getting much heavier
6.
Using the graph, by when has the reaction stopped making gas, Luz?
Use the picture in question 4.
- By about 50 s
- By 10 s
- It keeps making gas past 60 s
7.
Why does warming a reaction speed it up, Noah?
- Warm particles stop colliding
- Particles move faster and hit harder
- Heat makes each particle grow much bigger
8.
Why does milk stay fresh longer in the fridge, Ren?
- Cold slows the spoiling reactions
- Cold kills the milk's flavor
- The fridge adds a catalyst
9.
A crushed antacid tablet fizzes faster in water than a whole one. Why, Tala?
- The water is colder
- It has more mass
- It has more surface area
10.
Enzymes in saliva speed up the breakdown of food. What are enzymes acting as, Zee?
- Products
- Catalysts
- Fuels

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.

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