Matter
Vocabulary
Solutions/Mixtures
pH Scale
Chemical Reactions
100
What are the 3 states of matter.
Solid
Liquid
Gas
100
List two reversible changes.
Mixing sand and rocks, Sugar and water
100
List 2 ways that you can separate solids.
Air
Sieve
Magnet
Hands
100
What is the neutral number on the pH scale?
7
100
I cracked a glow stick how do I know a chemical reaction has occurred?
Colour change
200
What is the word for when liquid turns into gas
Evaporate
200
What does it mean if a reaction is irreversible?
It cannot be undone
200
When we mix vinegar and baking soda what does it make?
Carbon Dioxide (CO2)
200
List 2 examples of acids.
Various answers:
battery acid, coke, vinegar, fruits and juices, stomach acid, acid rain, coffee, saliva
200
When we mixed carbon dioxide and vinegar, how did we know there was a chemical reaction occurring?
The balloon blew up and a gas formed.
300
In order, list the types of matter that this picture shows.
Gas
Liquid
Solid
300
What are all solutions made of?
Solute and Solvent
300
If a substance can dissolve in water it would be what?
Soluble?
300
List 2 examples of bases.
Various answers:
salt water, milk, baking soda, ammonia, soap, bleach, drain cleaner
300
What is an example of a physical change?
Answers Varies (Eg. Breaking a pencil, boiling water, chopping wood)
400
What is the process of changing a solid to a liquid
Melting
400
What do you call a mixture of many different substances that you can see?
Heterogenous
400
What is a mixture where the components that make up the mixture are uniformly distributed throughout the mixture (it all looks the same)
A homogenous mixture.
400
Does a number 6 on the pH scale represent an acid or a base?
An acid.
400
What are the two things we look for to see if a chemical reaction happened? (HINT** There are more than two things)
Colour Change
Temperature change
Odor is produced
Gas is produced
500
Which of the states of matter take the shape of their containers?
Liquid and Gas
500
What is a force that is on the surface layer of a liquid that causes the layer to behave like an elastic sheet?
Surface tension
500
What is the difference between a mixture and a solution?
In a mixture, substances are usually just mixed and are not completely dissolved. In a solution, substances are dissolved completely and they cannot be separated.
500
True or false:
Bases are slippery and bitter while acids are sour and corrosive.
True
500
What is an example of a chemical change?
Answers Varies (Eg. Baking a cake, burning wood, mixing vinegar and baking soda)