Phys. & Chem. Changes
Phys. & Chem. Changes 2
Phys. & Chem. Changes 3
Phys. & Chem. Changes 4
Phys. & Chem. Changes 5
100
Which of the following is an example of physical change?
A. Mixing baking soda and vinegar together, and this causes bubbles and foam.
B. A glass cup falls from the counter and shatters on the ground.
C. Lighting a piece of paper on fire and the paper burns up and leaves ashes.
D. Baking a birthday cake for your mother.
B. A glass cup falls from the counter and shatters on the ground.
100
Which of the following is an example of chemical change?
A. Filling up a balloon with hot air.
B. Taking a glass of water and freezing it by placing it in the freezer.
C. A plant collecting sunlight and turning it into food.
D. Your dog ripping up your homework.
C. A plant collecting sunlight and turning it into food.
100
Students are investigating chemical changes that occur in different materials. Which TWO investigations would provide evidence of a chemical change?
a. Using a saw to cut a solid into two different pieces would provide evidence of a chemical change because the pieces cannot be put back together.
b. Using a hot plate to heat a solid until it changes color and releases an odor would provide evidence of a chemical change because the particles cannot be changed back.
c.Placing two different liquids together in a beaker and observing that a solid forms when they mix would provide evidence of a chemical change because a new material is formed.
d.Placing a mixture containing a solid and a liquid on a windowsill and letting the liquid evaporate would provide evidence of a chemical change because the evaporated material is lost.
b. Using a hot plate to heat a solid until it changes color and releases an odor would provide evidence of a chemical change because the particles cannot be changed back.
c.Placing two different liquids together in a beaker and observing that a solid forms when they mix would provide evidence of a chemical change because a new material is formed.
100
a.by pouring them through a filter
b.back to their original ingredients
c. using the property of magnetism
d. out into a liquid and a solid
b.back to their original ingredients
100
Which change can be easily be reversed?
A. Chemical Change
B. Physical Change
C. Both a physical and chemical change
D. Neither a physical or chemical change
B. Physical Change
200
When a new substance is formed with properties that are different from the original
substance, it is called a
A. Chemical change
B. Physical change
C. Freezing
D. Boiling
A. Chemical change
200
Which of the following statements would indicate that a chemical reaction has occurred?
You may choose MORE than one:
A. The substance was sliced into smaller pieces.
B. There was a color change.
C. An odor was given off.
D. A new substance was created
B. There was a color change.
C. An odor was given off.
D. A new substance was created
200
A student wants to investigate chemical changes by using different materials. What evidence would shows that a chemical change has occurred?
Investigation: An antacid tablet is put into water and bubbles form.
a gas is formed
200
In which of the following actions does a physical change occur to separate a mixture?
a. Stirring chocolate syrup into milk
b. Freezing a solution of water and sugar
c. Adding sand to a beaker of water
d. Evaporating water from salt water
d. Evaporating water from salt water
200
Diane draws a picture on a piece of paper and then folds it into a paper airplane. She throws it at her little brother, and its hits him in the head. He responds by ripping up the paper. Which of the following are examples of a physical change? Select all of the correct answers.
a. drawing on the paper
b. folding the paper into an airplane
c. cutting up the paper
d. burning up the paper
a. drawing on the paper
b. folding the paper into an airplane
c. cutting up the paper
300
What makes it possible to separate a mixture?
A. ages of the substances
B. values of the substances
C. how quickly the substances mixed together
D. the fact that no chemical changes have occurred
D. the fact that no chemical changes have occurred
300
What is the difference between when a physical change occurs and when a chemical change occurs?
Sample:
Physical changes are changes like color, size, shape, where the
substance is still the same “thing”. In chemical changes, a new substance is created; a
gas may be produced, the color may change, it may bubble or give off a smell.
300
A student wants to investigate chemical changes by using different materials. What evidence would shows that a chemical change has occurred?
Investigation: A solid and a liquid are mixed, and a sour smell is detected.
An odor is given off
300
Two items are combined inside a balloon. The balloon is tied shut. What observation would indicate that mixing the chemical produced a gas?
a.The balloon can hold a liquid.
b. The balloon increases in volume.
c. The balloon becomes cold.
d. The balloon was tied shut.
b. The balloon increases in volume.
300
what is an example of a physical change?
any acceptable answer
400
Which statement is true?
A. Most chemical changes can be reversed.
B. the ability to melt is a chemical change.
C. chemical change increases the matter of a substance.
D. A chemical reaction likely took place if a gas is released when one liquid is poured into another
D. A chemical reaction likely took place if a gas is released when one liquid is poured into another
400
Which investigation would provide evidence of a chemical change?
a. Spray perfume into the air, and when the air and perfume mix, observe the change in odor that happens as they mix.
b.Put an antacid tablet in water, and when the antacid and water mix, observe the bubbles that form as a new substance is created.
b. Put an antacid tablet in water, and when the antacid and water mix, observe the bubbles that form as a new substance is created.
400
A student wants to investigate chemical changes by using different materials. What evidence would shows that a chemical change has occurred?
Investigation: A pink liquid is heated, and the substance turns colorless.
A color change happens
400
Jodie wants to experiment with sugar cubes. Which of the following causes a sugar cube to only change physically, not chemically?
a. burning the sugar cube with a match
b. crushing the sugar cube and dissolving it in water
c. dehydrating the sugar cube with sulfuric acid
d. chewing the sugar cube and digesting it
b. crushing the sugar cube and dissolving it in water
400
what is an example of a chemical change?
any acceptable answer
500
Compare & Contrast chemical and physical changes. Name at least two characteristics of a chemical change, 2 characteristics of a physical change, and 1 commonality.
any 2 characteristics of a chemical change
any 2 characteristics of a physical change
commonality-both involve an alteration of matter; both can be observed visually through changes in appearance or state
500
Is frying an egg a physical change or a chemical change?
Frying an egg is a chemical change because you cannot go back to the raw egg, a new substance
has been created, it bubbles, it changes color, and it smells.
500
A student wants to investigate chemical changes by using different materials. What evidence would shows that a chemical change has occurred?
Investigation: Two different cold liquids are poured into a container, and the container then feels warm to the touch.
A temperature change happens
500
a. substance 1
b. substance 2
c. substance 3
d. substance 4
c. substance 3
500
When you burn a piece of paper, is this a physical change or a chemical change, and why?
It's a chemical change because the paper reacts with oxygen in the air to form new substances, like ash and gases, and cannot be reversed.