WorksheetsPhysical and Chemical Changes MC
Total questions: 36
Worksheet time: 18mins
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
Which describes only a physical change?
baking a cake
frying an egg
burning a piece of toast
squeezing the 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
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
When frozen carbon dioxide (C02) 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
Which task in the kitchen is an example of a physical change?
frying an egg
baking a cake
melting butter
toasting bread
A student kept a notebook during an investigation. Which recorded observation was
MOST likely a physical change?
The solution was heated for two minutes until it boiled
A solid formed when two liquids were mixed together
Two solutions were mixed and the resulting solution felt hot
The color of two mixed solutions changed from clear to white
Melting, boiling, and freezing are examples of
physical changes
chemical changes
magnetic changes
electrical changes
A student mixes a teaspoon of sugar in a large glass of water. What happens to sugar
when it is mixed with the water?
it boils
it melts
it dissolves
it evaporates
Which of these is NOT an example of a physical change of state?
boiling
stirring
freezing
evaporating
Which is an example of a physical change?
ice melting
nail rusting
bread baking
wood burning
Which of these BEST describes a change that is physical?
Yam being knitted into a sweater
The engine from a tractor being started
The metal on a bicycle forming rust
Grass capturing the energy from sunlight
Sugar is added to water and the mixture is stirred. Which observation is evidence that the
sugar dissolved in the water?
Less sugar is visible
The water is cloudy
The sugar turned into crystals
Bubbles formed in the water
Which of the following is an example of a chemical change?
clouds forming
sugar dissolving
water freezing
a candle burning
Whieh 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
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
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
Occurs when adding water to acid
Is a sign of a chemical change
Occurs when the water boils
Which describes a chemical change?
Sugar dissolving in tea
Sunshine warming a sidewalk
Scissors cutting paper into pieces
Acid in the stomach digesting food
Which change makes a new material?
Molding a clay figure
Breaking a drinking glass
Crushing ice cubes
Cooking eggs on a stove
Which part of digestion is mainly a chemical change?
Teeth break food into small pieces
Throat muscles push food toward the stomach
Stomach acids dissolve food into nutrients
Intestinal cells transport nutrients into the blood
Which is an example of a chemical reaction?
Vinegar added to baking soda forms a gas
Water evaporates into air
Sugar dissolves in water
Com kernels are crushed to form flour
A chemical change happens when
Glass breaks into pieces
Dough bakes in an oven
Ice cream melts into a liquid
Electricity flows through a wire
Missy and Ethan discussed examples of the types of changes in matter. In which example
is a chemical change taking place?
A piece of metal is cut in half
An ice cube belts on a counter
A camper roasts marshmallows over a burning fire
A baker mixes together flour and sugar to make dough
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
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
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
A student poured vinegar into a bowl with baking soda. When the vinegar and baking soda combine, bubbles appear because
a mixture forms
a new gas forms
the vinegar is a liquid
the baking soda dissolves
A nail is left in a container of water for a few days. Which change BEST shows that a new material has formed?
The nail looks broken
The nail begins to rust
The water becomes filled with bubbles
The water evaporates from the container
The illustration shows a number of changes occurring. Which is a chemical change?
The melting of the wax
The burning wick of the candle
The sugar dissolving in the tea
The steam coming from the tea
