1
Describe that matter is neither
created nor destroyed even though
it may undergo change.
2
A student mixed 125 grams of sugar, 250 grams of
water, and 5 grams of flavoring. The solution weighs:
A. 250 grams, because it is still the same amount
of water
B. 375 grams, because when water, sugar, and
flavoring are mixed the flavoring doesn’t weigh
anything
C. 380 grams, because water, sugar, and flavoring
weigh the same even when dissolved
D. 400 grams, because liquids get bigger when
they are combined all together
Which correctly explains the results of this
demonstration?
When 20 grams of baking soda is added to 100 grams
of vinegar a gas is released and it bubbles into the
air.
A. The solution has all bubbled away
B. The solution weighs less than 120 grams
C. The solution weighs exactly 120 grams
D. The solution weighs 140 grams
A student conducted the following experiment:
100 ml of water was poured into a cup, then put into
a baggie. It weighed 92 grams. When frozen, it
was slightly larger but still weighed 92 grams.
After melting it weighed 92 grams. What was her
evidence the weight did not change?
A. When frozen, it became slightly larger
B. When frozen, it changed from a liquid to a solid
C. It weighed the same when a liquid as when a
solid
D. It filled the same size of container whether
solid or liquid was
Fifteen grams of vinegar will be added to 100 grams
of milk. It thickens slightly.
What does the solution weigh?
A. 100 grams
B. 110 grams
C. 115 grams
D. 120 grams
A student used 125 sugar cubes to build a castle.
Each cube weighed 5 grams.
Which statement is correct?
A. A castle built with 125 cubes weighs 625 grams.
B. A castle built with 125 cubes will weigh 800
grams
C. Using 125 cubes, a tall tower will weigh more
than a wide tower
D. It is impossible to know the weight because the
castle would be too big for the scale
A house made of toy blocks is weighed. It is taken
apart and each block weighed separately.
If the weight of all the blocks is added, what will it
total?
A. A little less than the weight of the house
B. The same weight as the weight of the house
C. A little more than the weight of the house
D. It would depend on how large the house was
Sarah and Jake were each given a ball of clay of the
same weight.
Both students used all their clay to make an object.
Sarah rolled hers into a ball; Jake made a long,
skinny rope. What is the weight of the clay figures
now?
A. Sarah's weighs more because it is round
B. Jake's weighs more because it is long
C. There is no way of knowing
D. The figures would be equal
Water is boiled in a flask with a balloon over the top.
As the water heats, the balloon expands.
What has happened to the weight of this flask and
balloon in this experiment?
A. It has decreased as the water boiled away
B. It has stayed the same weight
C. It is unpredictable because the balloon is
flexible
D. It has increased as the balloon expands
Stuart measures 10 grams of water into a pan and
then freezes it.
A day later he takes the ice cube out of the pan and
notices it is larger than before. What will it
weigh?
A. 10 grams
B. 11 grams
C. 20 grams
D. impossible to know
Five grams of salt is dissolved in 100 ml of
water to form a saltwater solution.
If the solution is heated and the water boiled away,
how much salt would you expect to have left in the
container?
A. 2.5 grams
B. 5 grams
C. 105 grams
D. 500 grams
To make Blobbers, Kim mixes 25 ml of glue with 20
ml of water and 20 ml of Sodium Borate Solution
She stirs it quickly until it makes a ball. It seems
smaller now. What do you predict it will weigh?
A. Less than the sum of the ingredients, because it is
smaller than before
B. The same as the sum of the ingredients, even though it
has changed shape and size
C. More than the sum of the ingredients, because it has
become thicker than it was
D. It changes from more to less weight each time it is made,
so we can't determine how much it will weigh
Evaluate evidence that indicates a
physical change has occurred.
Which of the following is NOT a physical property of
matter?
A. shape
B. phase (solid, liquid, gas)
C. hardness
D. flammability
How do you know when something is a solid?
A. It will pour
B. It takes the shape of its container
C. It cannot be seen easily
D. It will hold its shape by itself
What evidence shows that ice had a physical change
when left out in a room?
A. It reacts with oxygen in the air
B. It changes to liquid water
C. It is hard and white
D. It is cold to the touch
The following data were collected by testing four
substances.
Each was tested to see if it floated in water, burned
when lit with a flame, or melted when heated.
Which substance had a physical change?
A. A
B. B
C. C
D. D
The following data were collected by testing four
substances.
Each was tested to see if it floated in water, burned
when lit with a flame, or melted when heated.
Which of the tests is not reversible?
A. floating in water
B. burning when lit
C. melting when heated
Martha wished to cool off a can of soda pop quickly.
She put it in the freezer but then forgot it.
When she went back the next day, the soda was all
over the freezer and the can was ripped open.
Martha wondered if all substances would do the
same thing as the soda. How could she design an
experiment to find out?
A. Pour the same amount of 4 different liquids into ice cube
trays. Wait one day and measure sizes.
B. Put 1 can of soda in the freezer and 1 can in the
refrigerator. Wait two days.
C. Put four cans of soda in the freezer and leave overnight.
D. Open 1 can of soda and don't open the other. Place both in
the freezer and wait a day.
Which of these describes paper after it has been
through a physical change?
A. It has been mixed with food coloring and
rubbing alcohol to change color
B. It has been burned and is now a pile of ashes
C. It has been rolled into paper logs and burned
for firewood
D. It has been cut into smaller pieces to make note
cards
Martha wished to cool off a can of soda pop quickly.
She put it in the freezer but then forgot it.
When she went back the next day, the soda was all
over the freezer and the can was ripped open.
Martha decided that a physical change had
occurred when the pop expanded. What evidence
supports her?
A. The can was stuck to the freezer
B. No new substance had formed
C. The soda was her last can
D. Chemical changes must have two substances
Investigate evidence for changes in
matter that occur during a chemical
reaction.
How might reactions with burning be important in
your daily life?
A. Burning creates food for people
B. Modern medicines depend on burning
C. Most clean water is created by burning
D. Burning fuels supplies light and heat
Baking soda and vinegar are mixed in a bottle. A
balloon placed over the top fills & expands with gas.
How do you know a chemical reaction has taken
place?
A. A solid and a liquid have been mixed together
B. A new substance has formed
C. The balloon has stretched and changed shape
D. The bottle has not been changed
Bread placed in a toaster turns brown then black if
left too long.
What was needed for this chemical change to take
place?
A. heat energy had to be added
B. heat energy had to be taken away
C. a certain amount of time had to pass
D. the bread had to be taken out of the wrapper
A pair of scissors left outdoors has rusted.
What evidence shows that a chemical reaction has
taken place?
A. They are hard to use
B. The sun has warmed them
C. They are dirty
D. They have a new brown/orange crust on them
How are fireworks examples of chemical reactions?
A. They are made of chemicals.
B. They change color and give off energy
C. It is easy to reverse the explosion
D. They are only used for special occasions
Mark made observations as he watched a white
candle burn. Use his data to answer the question.
Which of Mark's observations would show that a burning candle
is a chemical reaction?
A. black smoke is given off, how gases are rising
B. the wax starts to melt
C. the candle is white and made of wax and a wick
D. time passes one minute at a time
Mark made observations as he watched a white
candle burn. Use his data to answer the question.
Which of Mark's observations would show that a burning candle
has physical changes?
A. black smoke is given off, hot gases are rising
B. the wax starts to melt
C. the flame glows red and orange
D. time passes one minute at a time
Five grams of baking soda and 20 grams of vinegar
are added together. A bubbling reaction starts.
When it is over, the solution weighs 24 grams. Why
has the weight changed?
A. A gas has formed and left the mixture
B. The vinegar has evaporated
C. The new solution is lighter
D. Baking soda is lighter when dissolved in vinegar
Which of these foods have been through a chemical
change?
A. carrots cut up in a salad
B. vinegar and oil mixed together
C. juice and water stirred together
D. sugar and cream boiled to make a thick sauce
A student watches an ice cube melt into a puddle of
water. Has a chemical reaction taken place?
A. Yes, a gas has been given off
B. Yes, the color has changed
C. No, water does not react chemically
D. No, no new substances have formed
While cooking, Amber combined vinegar and milk,
which slightly thickened.
If she used baking soda instead of milk, which of the
following would happen between baking soda and
vinegar?
A. It would also become slightly thickened
B. It would not mix well together
C. It would bubble and form a gas
D. It would harden to become a solid
Which of the following is true about chemical
reactions?
A. Chemical reactions between two substances are
easily reversible
B. Anytime a solid and liquid are combined, they
always form a solid
C. Changing one of the materials in a chemical
reaction will usually change the results
D. Anytime vinegar is used in chemistry, a gas is
always released
A student was told that a car using gasoline was an
example of a chemical change.
What would be proof of this?
A. The gasoline sometimes evaporates.
B. A gas called exhaust is produced.
C. The car moves using its own power.
D. Gasoline is a liquid.
Which is the best example of a chemical reaction
that will help people?
A. Two liquids are combined to make a fruit juice
drink.
B. Liquids and solids are combined to make
chocolate chip cookies.
C. Popcorn kernels are heated to make a bowl of
popcorn.
D. Two metals react in a mild acid to make
electricity in batteries.
Great Job Everyone
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