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WorksheetsChemical Reactions Quiz
Total questions: 10
Worksheet time: 7mins
Everything is made of_____________________.
chemicals
science
sodium chloride
helium
Chemicals can react to form_______________________.
new chemicals
more atoms
the same chemicals
What happened when Bill ran electricity through the water molecules?
They made bigger water molecules
Water split into Hydrogen and Oxygen gas
It boiled and became water vapor
It became carbon dioxide gas
What happened when the steel wool reacted with the oxygen in the air?
The steel wool glowed and gave off energy
The steel wool burned and absorbed energy
The steel wool reacted with Nitrogen in the air
The steel wool boiled and became a gas
In the steel wool reaction, energy____________________.
was given off
was destroyed
was absorbed
did not change
Fire is a (a) that happens when chemicals react with (b) in the air.
What happened when the Sodium(Na) was put in water?
It glowed and gave off energy
It dissolved
Nothing happened
It glowed and absorbed energy
Sodium and Chlorine when separate are dangerous. But when they are (a) they form (b) which is also called (c) .
When a chemical reaction takes in more energy than it gives off it becomes _______________.
colder
hotter
bigger
smaller
There are only_________ naturally occurring elements in the world.
92
300
2
103
