1. * ** *** Recognise differences in rate of reaction
Choose between explanations to explain differences in reaction rate
Independently write and use particle diagrams to explain reaction rate

2. Warm
Cold

4. Weak
strong

5. Calcium carbonate
(marble)

6. Large
Small

7. Calcium carbonate
(marble)

8. 42s would be 0 hours 0 mins 42 seconds or 00:00:42

9. Lab report
You have to write a lab report for head office explaining how the rate of reaction can be changed by chemical change factors.
You are going to tell them about
Temperature
Concentration
Particle size
For each of the headings you need to say:
What you found out – e.g. the hotter the acid… the stronger the acid… the smaller the particle…
A graph of your results
You need to draw a particle diagram. Use colour if you can to show the different particles
At least a sentence explaining what is happening

10. Key words concentration particle size temperature collisions energy
movement
molecules
more
less
warm
cold
acid
large
small
surface area
contact
touch
faster
slower
fast
slow
between
more likely
less likely
ratio
volume