Physical Properties, Classify 09/20

4th Grade Science
Matter
Matter/Asunto
Reteach Lesson
Topic 2/Lesson 7

Teacher Facing
September 19, 2024

2

Teacher Background

Background Knowledge for Teacher
Matter makes up everything we see all around us. A book, milk, and helium are all examples of matter.
Matter is anything that takes up space and has mass. Matter occurs in different forms called states.
The three most common states of matter are solid, liquid, and gas.

Mass is found by using a pan balance or triple beam balance and is measured in grams (g) or
kilograms (kg). Mass is the amount of matter an object contains. The mass of an object will not
change regardless of where you move it in space. If you have a basketball on Earth and take it to the
Moon, it still has the same amount of matter. Weight, however, can change because weight is
determined by the pull of gravity. If you take a basketball from the Earth to the Moon, the pull of gravity
lessens, therefore the ball will weigh less on the Moon.

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Teacher Background

Background Knowledge for Teacher
Students have had multiple opportunities in previous years to observe objects that sink or float,
usually in water. For example, oil and water as found in Italian salad dressing demonstrates that oil
floats on top because it is less dense than the water (relative density). Give students opportunities to
further explore this comparison with a variety of items.

Density is defined as how much mass there is in a unit of volume. If two objects with the same volume
have different masses, the one with the greater mass has a higher density.

Magnets attract objects made of iron, nickel, cobalt, and alloys such as steel. They also repel and
attract other magnets. The repulsion (push) and attraction (pull) of magnets are forces that can cause
objects to move.

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Teacher Background

Background Knowledge for Teacher
Students need multiple numbers of examples and investigations to understand the difference between
a mixture and a solution. Students may have difficulty identifying the terms “mixture” and “solution”
since a solution is a mixture. Make clear the distinction between the two by identifying what happens to
the physical properties of each item.

A solution is a type of mixture made when one or more substances (solutes) are dissolved in another
substance (solvent). Solutions can be made of solids, liquids or gases.

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Materials

Student

Teacher

●

Screw

●

eraser

●

penny

●

paperclip

●

die

●

clay ball

●

Student recording sheet

●

Station cards

●

graduated cylinder

●

mass scale

●

ruler

●

Matter anchor chart

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Possible Student Misconceptions

●When calculating mass students often forget to add all of the measurements from the triple
beam balance together.

●Students may think that larger objects have a greater mass than smaller objects, which is not
always true.

●Students may think that mass and weight are the same.

●Small objects float, and large objects sink.

●Soft objects float, and hard objects sink.

●Floating objects have air in them somewhere.

●Students may think that all metals are magnetic.

●Students may think that all shiny objects are magnetic.

●Students may not realize that mixtures and solutions can be separated.

●Students might confuse mixtures and solutions.

4th Grade Science
Matter Reteach Lesson
Topic 2/Lesson 7

September 18, 2024

8

Do Now

The picture below shows Perri's parachutes that she made out of four different materials. She attached the same plastic toy to the end of each parachute. What should Perri do if she wants to find out which parachute will stay in the air the longest?

A. She should drop each parachute from a different height, at the same time, and use a stopwatch to find out which height caused
the most flight time.

B. She should drop each parachute from the same height and use a measuring tape to find the distance that each parachute
dropped.

C. She should drop each parachute from the same height, at the same time, and record the distance each parachute bounced
once it hit the ground.

D. She should drop each parachute from the same height and use a stopwatch to time how long it takes before it hits the ground.

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Matter

LO: SWBAT classify matter based on multiple physical
properties and compare a variety of mixtures and solutions.

DOL: Given scenarios, SW correctly classify matter based
on multiple physical properties and compare a variety of
mixtures and solutions in at least 4 of 5 questions.

SCI.4.6A classify and describe matter using observable physical properties, including temperature, mass, magnetism, relative density (the
ability to sink or float in water), and physical state (solid, liquid, gas);
SCI.4.6B investigate and compare a variety of mixtures, including solutions that are composed of liquids in liquids and solids in liquids; and
SCI.4.6C demonstrate that matter is conserved when mixtures such as soil and water or oil and water are formed.

Multiple Choice

Which word describes the photo best?

• shape

• taste

• mass

• hard

Multiple Choice

Which word describes the photo best?

• texture

• volume

• size

• odor

Multiple Choice

Which word describes the photo best?

• density

• shape

• taste

• odor

Multiple Choice

To be __________________, an object has to take up space and have mass.

• sight

• matter

• physical property

• hearing

Multiple Choice

Taste is a _________________ of matter.

• mass

• smell

• feeling

• physical property

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Essential Understandings &

Guiding Questions

How can we use physical properties to

describe matter?

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Physical proerties/Prociedad fisica

describe the way it…

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Lesson Vocabulary

physical property

matter

mass

volume

magnetism

relative density

solution

mixture

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When baking
sometimes you may
forget which
ingredients you are
using because the
white powders look
the same.

Why can we identify
substances based
on their physical
properties?

How can you use
the properties to

identify these
substances?

Color: blue, gold, silver, white, black, gray, yellow
Texture: rough, bumpy, smooth, fuzzy
Flexibility: flexible, not flexible
Hardness: soft, hard
State of matter: solid, liquid, gas
Sinks or floats in water: sinks, floats
Magnetism: magnetic, not magnetic

Size: long, short, wide, narrow
Shape: square, round
Mass: more, less
Volume: large, small

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Properties of Matter

Properties of Materials

Properties of Objects

How can we use

physical properties to

describe matter?

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Comparing Objects

Gold

Bumpy

Pink

Smooth

Does not

bend

Bends

Magnetic

Not

Magnetic

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Comparing Objects
Gold

Bumpy

Pink

Smooth

Does not

bend

Bends

Not

Magnetic


Magnetic

Shorter

Longer

Pointy End

Rectangular

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Comparing Objects
Gold

Bumpy

Pink

Smooth

Does not

bend

Bends

Not

Magnetic



Magnetic

Shorter

Longer

Pointy End

Rectangular

3 grams

25 grams

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Comparing Objects
Gold

Bumpy

Pink

Smooth

Does not

bend

Bends

Not

Magnetic


Magnetic

Shorter

Longer

Pointy End

Rectangular

3 grams

25 grams

1 mL

33 mL

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Comparing Objects

Gold

Bumpy

Pink

Smooth

Does not

bend
Bends

Not

Magnetic
Magnetic

Shorter

Longer

Pointy End

Rectangular

3 grams

25 grams

1 mL

33 mL

The screw and the eraser are both

_____________.

solids

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Comparing Objects

How are the two objects similar?

Solid

How are the two objects different?

Object 1: Screw

Object 2: Eraser

Gold
Bumpy
Does not bend
Hard
Magnetic
Shorter (2.5 cm)
Pointy end
Less mass (3 g)
Smaller volume (1 mL)

Pink
Smooth
Bends
Soft
Not Magnetic
Longer (5.5 cm)
Rectangular
More mass (25 g)
Larger volume (33 mL)

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Comparing Objects

How are the two objects similar?

How are the two objects different?

Object 1:

Object 2:

Draw the objects.

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Measuring Mass

Step 1: Place the object on the scale.
Step 2: Press the tare button.
Step 3: In the chart, record the mass displayed on the scale.

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Measuring Volume

Step 1: Check that there is 20 mL of water in the graduated cylinder.
Step 2. Carefully add the object to the graduated cylinder.
Step 3. Measure the new volume in the graduated cylinder.
Step 4. To find the volume of the object, subtract 20 mL from the volume measured
in step 3.
Step 5. On the chart, record the volume of the object.
Step 6. Carefully pour the contents of the graduated cylinder into the plastic
container. Retrieve the object.
Step 7. Add 20 mL of water to the graduated cylinder

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Measuring Size and Magnetism

Step 1: Use the ruler to measure the length and width of the object.
Step 2. On the chart, record the length and width.
Step 3. Place the object on a flat surface.
Step 4. Slowly slide the magnet toward the object.
Observe whether the object is magnetic.

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Discussing Density

Imagine placing the balls in water. What do you think will happen?

Clay Ball

Rubber Ball

Which ball is more dense than water? Explain your thinking.

Which ball is less dense than water? Explain your thinking.

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Identifying Solutions

Which materials formed a solution?

Which materials did not form a

solution?

How do you know?

Compare the mixtures.

What do you notice?

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Comparing Solutions

What is different about these two mixtures?

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Matter

Anything that takes
up space and has
mass

Image by Dimitris Vetsikas from Pixabay

Image by Alexas_Fotos from Pixabay

Image by Hans Braxmeier from Pixabay

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31

32

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Relative Density

The ability of a
substance to sink
or float when
placed in water

© Ihor95 – stock.adobe.com

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35

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A student measured, observed, and recorded an object’s physical
properties on the chart below.

Item

State of
Matter

Mass

Temperature

Magnetism

Sink of Float

?

solid

2 grams

22°C

not magnetic

sink

Which of the following would most likely be the object the student
measured and observed?

A. Penny

B. Ping pong ball

C. Iron nail

D. Ice cube

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Landon and Crystal made the table below to show the characteristics, or
qualities, of six different substances.

Which of the following combinations of
substances from the chart would create a
solution if mixed with water?

A. Sand and salt

B. Sugar and vinegar

C. Cooking oil and sugar

D. Sugar and iron filings

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DOL: Given
scenarios, SW
correctly classify
matter based on
multiple physical
properties and
compare a variety of
mixtures and
solutions in at least 4
of 5 questions.

Demonstration of Learning

●Some images used in this lesson are taken from Adobe Stock. Adobe Stock
https://stock.adobe.com

●Some images used in this lesson are taken from Great Minds. Great Minds
https://digital.greatminds.org

●Some images used in this lesson are taken from SAVVAS realize. SAVVAS
realize https://www.savvasrealize.com

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Copyright for Reference