WorksheetsChemistry Test Review
Total questions: 45
Worksheet time: 36mins
A green powder is heated & a gas is given off while it turns to a black solid. This describes
Physical Change
Chemical Change
Change in State
Change in Temperature
The formation of a solid when two liquids combine is called?
Solidification
Freezing
Precipitate
Solubility
Which type of change is most often easily reversed?
Chemical
Physical
Both a physical and chemical change.
Neither a physical or chemical change.
Identify what type of change happening in the picture below...
Chemical Change
Physical Change
Endothermic Reaction
Exothermic Reaction
Identify what type of change happening in the picture below...
Chemical Change
Physical Change
Endothermic Reaction
Exothermic Reaction
Identify what type of change happening in the picture below...
Chemical Reaction
Physical Change
Change in State
Change in appearance only
When a new substance is formed with different properties than the original substance it is called a...
Chemical change
Physical change
Change in State
Change in appearance only.
How do you know that rusting is a chemical change?
it changes color
atoms were rearranged to form a new substance
we just know
the rust
When we combine baking soda and vinegar, it fizzes and eventually turn into a liquid. What is actually happening?
baking soda melted into its liquid form
baking soda combined with the vinegar produced a new substance
evaporated into the air
A substance is found to have the following characteristics:
Very bitter taste
Feels slippery to the touch
Produces OH- ions when dissolved in water
In what category would the substance be classified?
acid
base
enzyme
fatty acid
You can make a solution more concentrated by adding more __________.
solution
In a sample of salt water, NaCl (salt) would be considered the ______.
The ability of water molecules to stick to each other, creating surface tension is called:
Cohesion
Adhesion
Insulation
Ph
Why does this picture demonstrate the Law of Conservation of Matter?
the number of atoms of each element are the same on both sides
they start out separate and end up combined
the same elements are used
it doesn't demonstrate the Law of Conservation of Matter
If the mass of a chemical reaction's product is 15 grams, what would the mass of the reactants be?
20 g
15 g
10 g
3 g
If a chemical reaction occurs in a closed system (no way for any part of the reaction to escape), how does the product mass compare to the reactant mass?
the mass would decrease
the mass would increase
the mass would stay the same
it depends on the type of reaction
What is the Law of Conservation of matter?
Matter is created in a chemical reaction
Matter is created in a physical change
New chemicals formed from a chemical reaction have a larger overall matter than the original reactants
Matter is never created or destroyed
According to the law of conservation of mass, how much zinc was present in the zinc carbonate?
256 g
88 g
104 g
40 g
two or more materials together
solution
mixture
solute
solvent
a mixture of one or more substances dissolved into another
solute
mixture
solution
solvent
What is the difference between a dilute solution and a concentrated solution?
diluted solution is more powerful
A dilute solution has very little solute dissolved and a concentrated solution has a lot of solute dissolved.
A dilute solution has a lot of solute dissolved and a concentrated solution has very little solute dissolved.
what is the difference between a physical and chemical property?
Physical properties you can buy but chemical you have to send away to Amazon
physical properties can NOT be observed while chemical properties can.
physical properties can be observed while chemical properties can only be observed during a chemical change
All of the following are examples of physical properties except
color
malleability
Number of atoms in the element
density
What is the difference between a physical and chemical change?
physical change does NOT change the substance and is reversible while a chemical change changes a substance chemically and is not reversible
physical change, changes the substance and is not reversible while a chemical change does not change a substance chemically and is reversible
Which of the following options provides evidence of a CHEMICAL change?
Wood is burned releasing ash and smoke
Rocks separate when soil is sifted
Boiling water bubbles when heated
Salt dissolves in water
In a controlled experiment, acid was dropped on a sample of chalk. Which of the following results would show that a chemical reaction took place?
The sample of chalk formed a wet puddle on its surface
The sample of chalk had partially dissolved.
The sample of chalk formed bubbles, showing a release of gas
The sample of chalk broke into smaller pieces
Which of the following is an indicator of chemical change?
Change in shape with the application of some type of force
Change in temperature with no outside heat source applied
The formation of a solid due to freezing
The formation of a gas due to evaporation
