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WorksheetsChemical Vs Physical Changes
Total questions: 26
Worksheet time: 15mins
Which of the following is an example of a chemical change?
water freezes to form ice
sugar dissolves in water
gasoline burns in a car engine
a piece of metal expands when it is heated
A change in the shape of an object is an example of _________________.
a chemical change
energy
an endothermic change
a physical change
Which one shows that a chemical reaction has occurred?
dissolving
melting
formation of a gas
bending
What is the BEST definition of a chemical reaction?
A change in matter that produces one or more NEW substances
When two things combine and EXPLODE.
In a chemical reaction, no new atoms are created, and no atoms are destroyed.
What is made of matter?
Only chemicals
Only plants and animals
Only things you can touch
Everything!
What is a physical change?
When something changes size, shape, or form
When something rots
When something explodes
Cutting paper is a ___.
chemical change
physical change
When something gets wet it is a ____.
chemical change
physical change
After a substance goes through a chemical change, it looks exactly the same.
True
False
Fireworks exploding are an example of a ___.
chemical change
physical change
Complete the sentence.
During a chemical reaction, atoms ________.
Completa la oración. Durante una reacción química, los átomos ________.
can appear
can disappear
get rearranged
stop moving and vibrating
What always happens in a chemical reaction?
¿Qué sucede siempre en una reacción química?
Some atoms of existing substances disappear.
Some substances change phase.
New atoms appear and form new substances.
New substances form from atoms of existing substances.
What is the BEST definition of a chemical reaction?
A change in matter that produces one or more NEW substances
When two things combine and EXPLODE.
In a chemical reaction, no new atoms are created, and no atoms are destroyed.
