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 backing soda what is the byproduct?
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 made slime, how did we know there was a chemical reaction occurring?
Temperature change
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
What are the three ways to make a mixture?
Solid- Solid
Solid-Liquid
Liquid-Liquid
300
List 2 examples of bases.
Various answers:
salt water, milk, baking soda, ammonia, soap, bleach, drain cleaner
300
We do know that put exhaust into our cars, it is what comes out. How do we know a chemical reaction has occurred?
Gas is produced and it is different from the original substance of liquid gas.
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
How can make a solvent absorb more product than it should? (think making crystals)
Heat it
400
Does a number 6 on the pH scale represent an acid or a base?
An acid.
400
What are the four things we look for to see if a chemical reaction happened?
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
Why is polarity important in water?
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 the reason that one of our chemical reactions in class might not have turned out?
- Bottle rocket the cork would not stay, so the pressure didn't build up
- Slime could not have been measured precisely or mixed too quickly
- There could have been cross-contamination when we looked at acids and bases and their colour