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Chemistry
5th
grade
Mystery Science: Chemical Reactions and Properties of Matter
10 questions
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- 1. Multiple Choice
What are some examples that show that an acid is reactive? Choose ALL possible answers.
Metal can dissolve.
The substance will bubble or fizz.
Gold is created.
There will be a color change.
Smoke can form.
- 2. Multiple Choice
Why are some acids used in food?
To sweeten the food.
To make it salty
So there will be a sour taste.
So there will be a bitter taste.
- 3. Multiple Choice
Are all acids dangerous?
Yes, all acids are dangerous because the dissolve metal.
No, all acids are not dangerous. We can eat and drink things with acid.
- 4. Multiple Choice
What are some examples of mild acids people can eat or drink? Choose all possible answers
Vinegar
orange juice
baking soda
Lemons or lemon juice
- 5. Multiple Choice
How can you make a dull penny shiny?
Dip it in vinegar.
Wash it with soapy water
Put it in salt and water.
Dip it in a vinegar and salt solution.
- 6. Multiple Choice
What causes shiny pennies to become dull?
They turn dull because they get dirty.
They turn dull when exposed to air over time (Oxidation).
They turn dull because they are just old.
They are dull to begin with.
- 7. Multiple Choice
Who were the alchemists?
A group of people who didn't trust a guy named Al.
A group of people long ago who tried to turn ordinary metal into gold using different liquids and experimentation.
A band.
A group of scientists in the 1950's who created penicillin.
- 8. Multiple Choice
When you left a steel nail in a bag with copper pennies and a vinegar and salt solution, the nail turned a copper color. What happened?
The steel nail turned into a gold nail!
The steel nail became copper all the way through.
Nothing happened in my bag, so I don't care.
The nail was covered with a thin layer of copper.
- 9. Multiple Choice
The alchemists claimed that ordinary metals can be transformed into gold. Is this claim true? Why or Why not?
This claim is not true. Metals can be coated with other metals; not transformed.
This claim is true! My steel nail is now gold.
This claim is not true. No explanation necessary.
This claim is true. Where is gold coming from, if not from alchemists?
- 10. Multiple Choice
Which substances helped you decide whether or not another substance was an acid or not?
Salt and pepper
Soap and water
Baking soda and the purple (black bean) liquid
mustard and soy sauce
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