This is a pre test - it helps me know what you know, rather than testing your retention of something you have already been taught. Don't worry if you don't know something, This is all stuff we will be covering (but not everything we will be covering) this session)
This is a pre test - it helps me know what you know, rather than testing your retention of something you have already been taught. Don't worry if you don't know something, This is all stuff we will be covering (but not everything we will be covering) this session)
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How many TOTAL ATOMS are in this compound?
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Water is a polar molecule, which gives it unique abilities and properties. What does it mean to be a polar molecule?
Water molecules have two positive ends
Water molecules have a positive end and a negative end.
water molecules have two negative ends.
The substance that dissolves other substances (does the dissolving) is known as the -
solvent
solute
solution
The substance that is dissolved is known as the -
solvent
solute
solution
The substance created when you mix a solute and solvent is known as a -
solvent
solute
solution
Polar substances dissolve other polar substances.
True
False
Non-polar substances can dissolve polar substances.
True
False
What is the boiling point of water?
100 degrees celsius
95 degrees celsius
0 degrees celsius
212 degrees celsius
This is a picture of a(an) __________, the building block of matter.
compound
element
mixture
atom
In the picture above, water is an example of
an atom
an element
a compound
a mixture
all of the above
Silver is found on the periodic chart. Therefore, it must be a (an)
element
compound
mixture
all of the above
This is a picture of an insulin molecule. Its formula is C257H383N65O77S6
Is it an element, a compund, or a mixture?
compound
element
mixture
atom
The picture above best represents which of the following?
an element
a compound
a heterogeneous mixture
a homogeneous mixture
Two or more atoms joined together is called a Molecule.
True
False
Idenitfy which of the following describe a compound. Choose ALL that apply.
Two or more elements chemically bonded together
One element chemically bonded together
One single atom
Has at least two capital letters in the chemical formula
Has one capital letter in the chemical formula
Select all examples of chemical changes.
Boiling water
Cooked pancakes
Soured Milk
Pencil shavings
Ice melting
Ash left after a fire
Which of the following groups contains only examples of physical changes?
bread baking, bread being sliced, bread being digested
Water boiling, a paper being ripped, wood being burned
a piece of metal being bent, a piece of metal rusting, a piece of metal tarnishing
Alcohol evaporating, a tree branch cracking, a car getting a dent
A chemical change can best be defined as...
a change in which a new substance is formed
a change that occurs in which a reaction occurs
a change that causes the chemical formula of the matter to be rearrange into new matter
all of the choices can be used to define chemical change
Look at each situation and determine whether it is an example of a physical change or a chemical change:
Physical Change
Chemical Change
No change takes place
Cake batter to cake
Dissolving drink powder into water
Rubbing alcohol evaporates
Fireworks exploding
A chemical bond formed when two atoms share one or more pairs of valence electrons.