Font size
WorksheetsChemical Magic Unit Review
Total questions: 39
Worksheet time: 30mins
What do fireworks, rubber, and Silly Putty have in common?
All are made through a physical reaction.
All are made through a physical change.
All are made through a chemical reaction.
All are made using the same substances.
An example of an acid that is NOT dangerous is ___.
bleach
lemon juice
sulfuric acid
ammonia
Why is this unit called "Chemical Magic"?
Because it's about physical change.
Because a magician wrote it.
Because chemical reactions can seem like magic.
Because all chemicals are magical.
A group of substances that are very reactive, taste sour, can dissolve metals, and cause a burning feeling.
acids
bases
chemicals
substances
Members of a historic group of people who mixed together different substances, with the hope of becoming rich.
scientists
chemists
professors
alchemists
Any substance that can react with some other substance.
acid
base
chemical
property
Any trait of a substance, such as its color.
physical
chemical
solution
property
Occurs when two or more substances are mixed together and result in a new substance.
chemical action
chemical reaction
physical action
physical reaction
When the properties of substances don't change.
chemical change
chemical reaction
physical change
physical reaction
Has no definite shape OR volume.
solid
liquid
gas
cube
Particles move quickly and are far apart.
solid
liquid
gas
plasma
Has definite shape AND volume.
solid
liquid
gas
water
Particles are close and vibrate.
solid
liquid
gas
oxygen
Has definite volume but NO definite shape.
solid
liquid
gas
brick
Particles move slower and slide by each other.
solid
liquid
gas
plasma
Which is not a gas?
oxygen
air
snow
carbon dioxide
What is the best way to make a dull penny shiny?
Wash it with soap
Dip it in vinegar & salt
Spit on it
Dip it in salt water
Which of the following describes what happens during a chemical reaction.
Matter appears out of nowhere.
Matter doesn't change.
Matter vanishes.
Amount of matter stays the same.
Which is an example of a chemical change?
Cutting your hair
Putting on make-up
Folding towels
Rust forming
The pizza weights 1.5 pounds. It's cut into 8 pieces. How much does it weigh now?
2 pounds
1.5 pounds
.8 pounds
.25 pounds
The salt and vinegar ______.
added a shiny layer to the penny
changed the penny to another metal
removed the dull layer from the penny
destroyed the penny
The dull copper ______ into the salt and vinegar.
dissolved
formed
vanished
appeared
What causes a penny to turn brown?
dirt
air
oil
water
When pennies or even food become darker, we refer to that as _____.
molding
oxidizing
rotting
rusting
When you left the steel nail and copper pennies in a bag of vinegar and salt, the nail turned copper-colored. What happened?
The nail was transformed from steel into copper.
The nail was covered with a thin layer of copper.
A steel layer was removed from the nail, showing copper underneath.
Magic.
What does it mean if an acid is reactive?
It means an acid tastes sour.
It means an acid reacts with lots of different substances.
It means an acid does not react with lots of different substances.
It means it can't control its emotions.
Alchemists mixed many different types of ______.
metals
pennies
substances
fruit
The sap from a rubber tree is called what _____.
syrup
latex
vinegar
plastic
What two substances mixed together created goo?
borax and milk
baking soda and glue
glue and borax
milk and vinegar
Alchemists created _________ by mixing different substances together.
old materials
new materials
the same materials
matter
When you mix the sap from a South American tree with acid what new substance do you get?
plastic
rubber
glass
metal
What is the first picture modeling?
solid
liquid
gas
plasma
What is the 2nd picture modeling?
Solid
Liquid
Gas
Plasma
What is the 3rd picture modeling?
Solid
Liquid
Gas
Plasma
No, you could cover it up or coat it to make it look like gold but not turn it into gold.
Yes, like we changed the pennies into copper.
Yes, anything can be changed, even a tire could be changed into gold.
No, people don't have magic anymore.
Mix with baking soda, if it fizzes, it is an acid.
Taste it, if it is sour, it is an acid.
Look at it and tell if it is an acid.
Use your sixth sense.
What gas is produced when you mix vinegar and baking soda?
Oxygen
Carbon Monoxide
Carbon Dioxide
Helium
If we freeze a liquid with a mass of 150 g, what will be its mass when it's frozen?
100 g
200 g
250 g
150 g
If we get the mass of the dull pennies and the salt and vinegar solution before and after the experiment, we will see that the mass of the pennies goes (1) and the mass of the solution goes (2) after the experiment.
(1) up, (2) down
(1) down, (2) up
(1) down, (2) down
(1) up, (2) up
