Changes in Matter
Grade 2 SC.2.P.9.1
Division of Academics - Department of Science
Changes in Matter Benchmarks
•
•
•
•
•
SC.2.P.9.1 – Investigate that materials can be altered to change some of their
properties, but not all materials respond the same way to any one alteration.
SC.2.N.1.1 Raise questions about the natural world, investigate them in
teams through free exploration and systematic observations, and generate
appropriate explanations based on those explorations.
SC.2.N.1.2 Compare the observations made by different groups using the
same tools.
LAFS.2.RI.2.4Determine the meaning of words and phrases in a text relevant
to a grade 2 topic or subject area
LAFS.2.SL.1.1 Participate in collaborative conversations about topics and texts
with peers and adults in small and larger groups.
Division of Academics - Department of Science
All Matter has Properties, but Matter
also undergoes Changes
Look at a sheet of paper. What are its physical properties?
It’s white. It’s flat. It feels smooth. It’s shape is a rectangular
prism. It’s made from trees.
Think of a way to change it. What are some ways?
Folding
Bending
Tearing
Cutting
Crumpling
Try one way.
Reflection:
1. What did you do to change the paper?
2. Describe how your paper is different from the flat
piece of paper you started with.
3. Describe how your paper is same as the flat piece of
paper you started with.
Department of Mathematics and Science
Changes in Matter
Is it still paper? What was changed?
It’s shape or size or maybe its texture.
These are physical properties that describe how an
object looks or feels.
Yes, the paper changed in how it looks, but what it is
made out of did not change. It is still paper made from
trees.
These changes are called physical changes.
A physical change is a change in the physical properties
of matter. The matter changed in how it looks, but what
it is made out of does not change.
Division of Academics - Department of Science
Things that Change Fundamental
Now let’s do the fun-damental Things That Change,
Physical Changes to learn more about changes in matter.
Explore
Physical
Changes
Follow the directions.
Explain on each item is
changed physically.
Changes in Matter
Let’s discuss how the physical changes in the pictures.
1.
2.
3.
4.
What did you learn about Physical Change ?
In a physical change, the object is changed, but not what
the object is made out of.
Properties of matter can be used to describe how an
object looks or feels.
Division of Academics - Department of Science
More on Changing Matter
What is happened to the ice cubes?
• They’re melting. Why?
• If you add enough heat energy to ice, it turns into
liquid water, then it turns into a gas called water vapor.
• If you cool the substance, by taking away heat energy,
you can reverse these changes.
• You can change a gas into a liquid and a liquid into a
solid.
What type of change is this?
• Changing from one state to another state is
an example of a physical change.
How does heat affect physical changes?
A change in temperature can change materials.
Some types of matter change state when
enough heat is added to it - melting it.
Some change when heat is taken away
from it – freezing it.
What are some examples of each?
Department of Mathematics and Science
Let’s Think!!
What are some physical changes we could make to these objects?
Paper
Sponge
Clay
Fabric
Ice cubes
Clothes
Division of Academics - Department of Science
What are some examples of Physical Changes?
1.
4.
tearing
crushing
5.
2.
cutting
melting
6.
3.
bending
freezing
Division of Academics - Department of Science
Physical Changes Quiz
Physical changes can happen when matter is…
cut/ torn
folded
bent
crushed
crumbled
rolled
squeezed
Changing
temperature
(hot to cold
cold to hot)
melting
freezing
1. Look at the pictures on the next slide.
2. Number your paper 1. - 8. You will not use two
of the choices.
3. Write the type of physical change you
think is taking place.
Division of Academics - Department of Science
Physical Change Quiz
Use the paper numbered 1. – 8. Then identify the
type of Physical Change for each picture below .
1.
5.
2.
6.
3.
7.
Division of Academics - Department of Science
4.
8.
Reflection
1. What are some of the ways that you can
change materials?
Answer: You can change materials with
temperature, or by cutting, ripping, smashing,
scrunching, crushing, etc.
2. How can temperature change water?
Answer: Temperature changes can change the
state of matter (cold makes water solid ice; heat
turns solid ice into liquid water).
Division of Academics - Department of Science
What are
Chemical Changes?
c
Chemical Change
Chemical changes produce new substances
that have different properties than the original
substances.
What are some examples of chemical changes?
• Burning
• Rusting
• Cooking and baking
Things that Change Fundamental
Click on
Follow the directions to explore chemical changes.
Explain how each item is changed chemically.
Department of Science
Reflection on Chemical Changes