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WorksheetsP.5.5c
Total questions: 50
Worksheet time: 3hrs 30mins
A group of students weighed a sealed jar full of heavy cream. Then they shook the jar until the cream separated, and then they weighed the jar again. Which of the following would BEST describe its weight?
The jar will have gained weight because some liquid changed to a solid.
The jar will have gained weight because shaking added energy to it.
The jar will have lost weight because of friction from shaking the liquid.
The jar will have kept the same weight because it did not gain or lose any matter.
Cherise mixed 30 grams of sugar into 100 grams of water. The sugar dissolved. Find the mass of the sugar solution.
Water Mass 100 grams Volume 100 mL
Sugar Mass 30 grams Volume 15 mL
sugar solution Mass ? Volume 108 mL
100 grams
108 grams
130 grams
200 grams
Julia is following a recipe to make batter for a cake. She uses a scale to weigh each ingredient separately. Julia can BEST use this information to predict the weight of the mixed batter by
adding the weights of each ingredient together.
multiplying the weights of each ingredient together.
dividing the weight of the wet ingredients from the weight of the dry ingredients.
subtracting the weight of the wet ingredients from the weight of the dry ingredients.
A jeweler melts gold to make jewelry. As the gold melts, the mass
increases
decreases
is destroyed
stays the same
Tracy measured the mass of an empty beaker. The mass of the beaker was 100 grams (g). She filled the beaker with some water and measured the mass again. The total mass was 150 grams. Tracy put the beaker with water in the freezer. After the water froze, what was the mass of the beaker?
50 g
100 g
150 g
500 g
Students took some ice cubes out of the freezer at 1:00 p.m. An hour later, they observed how the ice cubes had changed. The change is BEST described as
chemical because a liquid formed.
physical because it happened over time.
physical because no new substance was formed.
chemical because heat caused the change.
When sugar in a beaker is heated over a low flame, the solid crystals disappear and a thick, yellow-brown liquid forms. Determine whether this change is a chemical reaction or a physical change.
chemical reaction
physical change
Several milliliters of water were added slowly to a container holding liquid nitrogen at a temperature of –96°C. Large bubbles formed in the mixture, and the volume of the mixture decreased. After the mixture stopped bubbling, a solid had formed the bottom of the container. When the solid was isolated, it floated in water and melted at 0°C. Based on these observations, determine whether a chemical reaction occurred.
A chemical reaction did not occur
a chemical reaction did occur
A student bends a piece of wire. Which of these BEST describes why bending the wire is an example of a physical change?
because the bent wire is a more useful tool
because the bent wire is a new material
because the bent wire will break into two pieces
because the bent wire can be straightened again
Manuel was having trouble opening a new glass jar of pickles. His father told Manuel to hold the metal lid of the jar under running hot water for a few seconds, then try again. Then the lid opened easily. What is the MOST likely reason Manuel’s father suggested using hot water to loosen the lid?
Glass contracts when it is heated.
Metals expand when they are heated.
Metals are easier to grip when they are warm.
Hot water reduces friction between metal and glass
When water changes from a liquid to a gas and then the steam condenses back to the liquid form, these types of changes are
physical
chemical
electrical
mechanical
What happens to sugar when it is combined with water?
it separates
it dissolves
it floats to the top
it becomes warm
What happens to colored sugar when it is added to water?
The sugar reacts and colors the water.
The sugar becomes white and the water changes color.
The sugar evaporates and the water changes color.
The sugar dissolves and colors the water.
Jonah’s homework assignment was to collect pictures of physical changes. Which picture shows a physical change?
Jessica is making fruit punch for her friends. She pours the powder into a container with sugar and water. Which of these BEST describes what happens to the sugar?
it expands
it dissolves
it condenses
it evaporates
Which describes only a physical change?
baking a cake
frying an egg
burning a piece of toast
squeezing juice from fruit
Some power plants produce energy by burning coal. In these power plants, the heat from burning coal is used to boil water. Which statement BEST describes the changes that occur when burning coal and boiling water?
Burning coal and boiling water are both physical changes.
Burning coal and boiling water are both chemical changes.
Burning coal is a chemical change, and boiling water is a physical change.
Burning coal is a physical change, and boiling water is a chemical change.
Which of these is a physical change that takes place in a garden?
Insects eat the leaves of a plant for food.
Flowers grow after a summer rain shower.
Earthworms loosen soil as they travel through it.
Leaves convert sunlight to sugar by photosynthesis.
An artist carves a statue by chipping off pieces from a marble slab. Which of these is the BEST reason to describe the carving as a physical change?
The statue is the same substance as the slab.
The statue is made from a natural material.
The artist uses a chisel to make the statue.
The artist will work many hours to make the statue.
A potter molded wet clay into the shape of a bowl and let it dry. The potter knows that the clay went through a physical change when it became a bowl because the bowl
is a different color than the wet clay.
is the same substance as the wet clay.
has a different texture than the wet clay.
holds the same amount of water as the wet clay.
Which of these could be a physical change?
Wood is burned in a fireplace.
Cake batter is baked in an oven.
A blue liquid and a yellow liquid mix and make a green liquid.
Baking soda is mixed with vinegar to make carbon dioxide gas.
The metal lid on a glass jar is hard to open, so it is held under warm, running water. What causes the jar to open easily after it was held under the water?
The water increased the pressure under the lid.
The jar shrunk with the warm water.
The water acted as a lubricant between the glass and the metal.
The metal lid expanded under warm water.
When frozen carbon dioxide (CO2) is heated, it changes directly into a gas. Which statement BEST indicates that a physical change has taken place?
Heat caused an increase in gas production.
Heat caused a new substance to form.
Heat caused a decrease in energy.
Heat caused a change in state.
Students performed an investigation on how aluminum cans taken to a recycle center were able to be reused. They found out an aluminum can undergoes which type of change?
a physical change because the can is heated
a chemical change because new metal is formed
a physical change because the material remains the same
a chemical change because an old can is changed into a new can
Which of the following is an example of a chemical change?
clouds forming
sugar dissolving
water freezing
a candle burning
Which is a chemical change?
frying an egg
boiling water
breaking a glass cup
crushing a piece of bread
Physical and chemical properties can be used to classify substances. Which of these shows a chemical property?
Silver melts.
Magnesium burns.
Sulfur is a yellow solid.
Aluminum conducts heat.
A type of cold pack has two separate sections inside. One section contains a liquid and the other section contains a powder. When the cold pack is squeezed, the section that holds the liquid breaks. When the liquid combines with the powder, the pack becomes very cold. Which is the BEST explanation why the temperature of the pack decreases when the liquid and powder combine?
A mixture forms.
A solution forms.
A chemical change occurs.
Thermal energy is used.
Mrs. Garza’s class mixed some materials. They made a table of the materials and the products after the materials combined. Based on the table, which materials mixed to form a new substance?
water and flour
water and salt
iodine and flour
iodine and salt
Which event is an example of a chemical change?
fog rising off a river
wood burning in a fireplace
ice cream melting in the sunshine
grinding peppercorn into pepper flakes
Terry made a solution of citric acid in water. He added three drops of an indicator to the solution. There was no change. He weighed the beaker of solution and recorded a weight of 145 grams. Then he added 5 grams of sodium carbonate powder to the solution and stirred. After stirring, Terry observed that the solution turned pink. No solid remained in the beaker. What was the final mass of the solution and the beaker?
142
140
150
135
Malia had two solutions in beakers. She poured Solution A into the beaker with Solution B. White crystals formed. Malia used a filter to collect the crystals, and then she let them dry. Her data are shown in the table. Malia did not weigh the solution after removing the crystals, but she was able to calculate the mass of the final solution.
What was the mass of the final solution?
179
225
133
121
Which example shows a new substance being formed?
a candle burning
a shoelace being tied
a pipe being cut in half
a block of ice melting
Which of these is an example of a new substance being formed?
a nail rusting
a wall being painted
water changing to steam
paper being folded
Kim lost her hammer outside. When she found it a few months later, some parts of the metal were covered with flaky, brown rust. Which type of change occurred when rust formed on the hammer?
chemical
electrical
thermal
physical
One type of cold remedy is an effervescent tablet that breaks down in water. When the tablet is placed in water, it forms gas bubbles. In this example, the formation of a gas
is a physical property.
B.
occurs when adding water to acid.
is a sign of a chemical change.
occurs when the water boils.
Which results in a chemical change?
A student smells a flower.
A teacher lights a candle.
A student colors a paper blue.
A teacher feels a rough cloth.
Campers burned logs in a campfire. How would the campers know that a chemical change has taken place?
The logs changed shape.
The rocks glowed when heated.
The wood became a different substance.
The ground absorbed heat from the coals.
Which describes a chemical change?
sugar dissolving in tea
sunshine warming a sidewalk
scissors cutting paper into pieces
acid in the stomach digesting food
A student placed an egg in a container of vinegar.
Bubbles formed on the shell of the egg, and after three days, the shell was gone. Which observation made by the student indicated a chemical change took place?
The bubbles were produced as the shell reacted with the acid.
The vinegar solution remained clear.
The temperature of the vinegar remained the same
The shape of the egg remained oval.
A student kept her bicycle outdoors. After a few seasons, some of the metal on the bicycle became reddish-brown and flaky. What happened to the metal on the bicycle?
The metal was damaged by insects.
The metal became covered with pollution.
The metal was used over time and became worn-out.
The metal combined with water and formed a new substance.
Which change makes a new material?
molding a clay figure
breaking a drinking glass
crushing ice cubes
cooking eggs on a stove
Which action causes a chemical change?
leaves dropping from a tree
leaves blowing in the wind
leaves being burned in a fire
leaves being crushed into pieces
A group of students did an experiment in their science lab. They followed this procedure:
• Use a balance to measure the amount of vinegar solution added to a beaker.
• Use a balance to measure the amount of baking soda solution added to a second beaker.
• Use a balance to find the mass of a large beaker.
• Mix the two solutions together by pouring them into the large beaker.
They observed that large bubbles formed and the mixture became cold. When the mixture stopped bubbling, they used the balance to find the mass of the large beaker and the material inside it. What is the mass of the solutions before they were mixed and after they were mixed?
327 g before and 647 g after
207 g before and 200 g after
327 g before and 320 g after
207 g before and 327 g after
a change that alters the identity of a substance, resulting in a new substance or substances with different properties
physical property
physical change
chemical property
chemical change
what is needed to do work or cause change
weight
energy
matter
element
degrading or breaking down into smaller parts
cooking
compound
decaying
element
a property that you can observe only when the matter changes as a result of a chemical reaction.
physical change
physical property
chemical change
chemical property
a property that you can observe without changing the matter itself
chemical change
physical change
chemical property
physical property
making different without changing what the material is made of, such as by cutting, folding, or melting
physical change
chemical change
physical property
chemical property
