Matter
Vocabulary
Mixtures
pH Scale
Experiments
100
These are the 3 main states of matter.
Solid
Liquid
Gas
100
what shape do salt crystals grow in?
cubes
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
What is a hypothesis?
An educated guess about what might happen in an experiment.
200
These are the 2 forms of matter take the shape of their container.
Liquids
Gases
200
What is the saturation point of a solution?
When a solution is not able to dissolve any more solute.
200
What is a solute?
A substance dissolved in a solution.
200
List 2 examples of acids.
Various answers:
battery acid, coke, vinegar, fruits and juices, stomach acid, acid rain, coffee, saliva
200
What is a conclusion?
The answer to your hypothesis based on what happened in the experiment. This is different from the observation.
300
In order, list the types of matter that this picture shows.
Gas
Liquid
Solid
300
List 2 examples of a chemical change.
Baking bread, cooking an egg, burning wood, milk going sour, rusting metal, rotting fruit, combining vinegar and baking soda, elephant toothpaste.
300
What is a solvent?
The substance that something is dissolved in.
300
List 2 examples of bases.
Various answers:
salt water, milk, baking soda, ammonia, soap, bleach, drain cleaner
300
When we dropped pennies into water and watched the water rise into a dome shape instead of spilling over, we were learning about _______________?
surface tension
400
what are 2 signs a chemical change has happened?
change in color
change in odor
bubbles formed
precipitate is formed
decomposing
change in temperature
400
What is the official definition of chemistry?
The study of matter and its properties.
400
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.
400
Does a number 6 on the pH scale represent an acid or a base?
An acid.
400
What is one of our experiments where you saw a chemical change take place?
classroom chemistry detectives
crystals
Carbon dioxide candle
baking soda volcano
500
Betty floated a paperclip on water in one cup. in another cup she mixed dish soap and water, if she put a paperclip in the water what would happen?
it would not float
500
List 2 examples of a physical change
Cutting wood, melting ice, breaking glass, bending metal, folding paper, crushing a candy
500
List 1 way we could speed up the dissolving of a solute into a solvent.
-increase the temperature of the solvent
-crush the solute if it’s a solid
-stir the solute to speed up the molecules
500
True or false:
Bases are slippery and bitter while acids are sour and corrosive.
True
500
When we boiled water in the tea kettle, we saw the water _________ and turn to vapour.
Evaporate