A
B
C
Look at the diagram above. Describe the changes in state from beaker A to
beaker B and beaker B to beaker C.
From A to B we change from solid to liquid. From B to C we change from
liquid to gas.
True or False: When water droplets form on the side of a cold glass of water
on a hot day, or when dew forms on grass it is called condensation.
Below, write the Law of Conservation of Matter:
Matter is neither created nor destroyed but it can change forms.
Place the following changes into the correct category:
Cutting wood, melting, boiling, rusting, cutting, breaking glass, burning,
tearing, adding sugar to coffee, ripping, the way matter looks, food spoiling,
frying an egg, fireworks, baking a cake, a new substance is formed
Chemical Change
Rusting
Burning
Frying an Egg
Fireworks
Baking a Cake
Food Spoiled
A New Substance is Formed
Physical Change
Cutting Wood
Melting
The Way Matter Looks
Cutting Paper
Breaking
Ripping
Adding sugar to coffee
Tearing
Boiling
List the six indicators that a chemical change has occurred:
1.
2.
3.
4.
5.
6.
heat
color
a new substance
light
odor
sound
True or False:
A chemical change is hard to reverse.
You have an ice cream like the one to the left. You put it down
outside and forget you left it for over an hour. What evidence
do you have that the ice cream underwent a physical change
when you return? We will have a change in state from a solid to a
liquid because the ice cream will melt.
Indicate if the weight of a substance is changed in the following scenarios:
Adding salt to a glass of water
Stirring a substance
Burning a substance
Freezing a substance
When ice melts in a glass of
water
Yes
No
Yes
No
No
In chemistry, a reaction happens when two or more molecules interact and
the molecules change.
True or False: Steel is not an element.
A property that involves how a substance interacts with other substances is a
chemical property.
Circle the correct word in parenthesis. A physical change is a change that
(does/does not) result in a new substance.
Matter is anything that takes up space and has mass.
True or False: Paper, trees, desks, clothing and oxygen are examples of
matter. Energy, light and sound are not examples of matter.
An atom is the smallest possible particle of an element. An element is a
substance made of just one kind of atom. Gold, iron, and silver are elements.
Most metals are shiny, can be stretched out thin, can be drawn out in wires,
but they are NOT brittle.
A chemical property of a substance is that it reacts with oxygen.
A change that results in the formation of a new substance is a chemical
change. Hydrogen and oxygen combining to form water is an example of a
chemical reaction/change.
A compound is a substance made of two or more kinds of atoms that are
chemically combined. Salt, sulfur dioxide, and water are compounds. Oxygen
is not a compound.
If you dissolve salt in water, you can prove that there has only been a
physical change because when the water evaporates, salt will be left in the
container.
If a solid melts at 52 degrees Celsius, it will reform into a solid state when
cooled below 52 degrees Celsius.
Mass is defined as the amount of matter an object has. In other words,
mass is the property of substance
that tells us how much of the substance there is.