States of Matter
Name the 3 main states of matter
solids, liquids, gases
Which of the following is an example of a chemical change?
a) burning wood
b) condensation
c) poking a skewer through a balloon
d) mixing different coloured marbles
a) burning wood
the only one where a new product is formed
Give an example of a substance that is hydrophobic
oil
Heather's magic show can be described as:
a) Fantastic
b) Amazing
c) Life changing
d) all of the above
The ONLY correct answer is D all of the above
Vinegar is considered an________
acid
This state of matter maintains its shape
solid
Give an example of a physical change
Matter changes form but not chemical identity
chopping wood
melting ice
shredding paper
a __________ is when an atom combines with one or more atoms
molecule
In our acids and bases experiment what was used as the acid-base indicator
red cabbage juice
What is the highest number on the pH scale?
14
The molecules in this state of matter move freely at high speedes
gas
What is the difference between dissolving and melting?
dissolving involves a liquid and something else (usually solid) and makes a new liquid
Melting only involves a solid turning into a liquid and involves the same material
The friction in a liquid is called
viscosity
In our plate art exploration, why did the corn syrup sink? (think of the scientific words)
It was DENSER then the water and milk
Would you expect soap to have a higher or lower pH than water?
Soap is basic, so it would have a pH higher then water
Give an example of a non-newtonian fluid
Oobleck, ketchup
What is the difference between a mixture and a solution?
Mixtures have 2 or more substances that keep their identities (think trail mix)
Solutions are two or more substances that create a new substance
mass/volume
What 3 ingredients did you use to make your own polymer
food colouring
corn starch
shampoo
What does pH stand for?
Power of hydrogen OR potential hydrogen
When a liquid turns into a gas it is called
evaporation
Define polarity
The way atoms in a molecule bond to other atoms in molecules
A chemical reaction that absorbs heat is called a ______________ reaction
Endothermic
The chemical found in diapers, that was used for the disappearing water trick is called.....
Sodium Polyacrylate
Another word for basic is
alkaline