Physical Changes
Define a physical change
A change in shape, size and form. The substance is still the same.
Define a chemical change.
A new substance is created.
Define a solid.
a. definite volume and shape
b. undefined shape and volume
c. undefined volume, but a definite shape
A. Definite volume and shape.
Define a natural resource.
A resource that can be found in nature.
Density
Heaviness vs. Lightness.
True or False. An ice cube melting is an example of a physical change.
True.
True or False. Baking a cake is a physical change.
False.
Define a gas.
a. undefined volume and shape
b. undefined shape, but the volume is defined
c. undefined volume, but a definite shape
A. Undefined volume and shape.
Define a manmade resource.
A resource that was made by a human or machine.
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.
Is a physical change reversible or irreversible? Explain.
Reversible.
Is a chemical change reversible or irreversible?
Irreversible.
Define a liquid.
a. defined volume and shape
b. undefined shape and volume
c. defined volume, but take s on the shape of its container.
C. defined volume, but take s on the shape of its container.
Give an example of a manmade object that used natural resources in order to be created.
EXAMPLE- Desk- wood
Reversible vs. Irreversible change.
A reversible processt can return to exactly the states they were in by following the reverse path.
An irreversible process cannot return together to exactly the states that they were in.
Evaporation. Is an example of a physical change. What is evaporation?
Changing a liquid to a gas.
Which is a property of chemical changes?
a. Change in color
b. Change in shape
c. Change in odor
C. Change in odor.
Is this a reversible or non-reversible change: freezing water?
Reversible.
What is a resource?
a. our solar system
b. something we use
c. things we buy
B. Something we use
Physical vs. Chemical Reaction. Paper station. Explain.
Changing the shape, size or form of the paper was a physical change.
Burning the paper was a chemical change as it turned from paper into aches.
Name three common physical properties
Shape
Size
Weight/ Density
Etc.
Which is an example of chemical change?
a. Water freezes
b. Wood is cut
c. Bread is baked
d. Wire is bent
C. Bread is baked.
What property stays the same during physical and chemical changes?
a. Density
b. Shape
c. Mass
d. Arrangement of particle
C. Mass
Wood
Cereal
Paper
Trees
Desk
Wheat
Which were used to create each other? Please match. Must indicate which is the natural resource, and which is the manmade resource.
Trees(n)- paper(m)
Wood (n)- desk (m)
Wheat (n)- cereal (m)
Mentos and Soda. Physical or Chemical Change. Explain
Physical change.