Matter

Mass: Is the amount of matter in an object.
Volume: Is the space occupied by a matter.
Activity (1): Measuring Tools
Here are, some photographs for measuring tools of lengths,
masses and volumes, try to identify them then complete the
following table:
Sensitive balance Common balance Measuring ruler Graduated tape (Graduated cylinder)
Quantity
Measuring tool length Mass Volume
1- Common balance 3


We use:
1- Graduated tape and measuring ruler in measuring lengths.
2- Common balance and sensitive balance in measuring
masses.
3- Graduated cylinder in measuring volumes.
Measuring Units
There are large and small measuring units, for example, when
estimating the dimensions of the classroom, we use "metre"
while in estimating the length of a pencil, we use "Centimeter".
But when you buy fruits, we use kilogram" while using "Gram"
in estimating the mass of gold. to learn more, try to perform this
activity.
Activity (2): Objects and measuring units:
Here are a set of objects, identify the best units for measuring
length and mass in the following table:
the object unit of measuring
the length
unit of measuring
the mass
1- Table
2- Pencil
3- Sciece book
• Length measuring units are: meter - centimeter.
• 1 meter = 100 centimeter.
• Mass measuring units are: Gram - Kilogram.
• 1 kilogram = 1000 gram.
Exercise:
What is the benefit of measuring
tools when purchasing some things
according to your point of view?

science

Read and learn
There are large units
for measuring length
and mass:
Kilometer = 1000 meter
Ton = 1000 kilogram

Estimating volumes of solid objects:
Solid objects may be regular or irregular in shape.
Activity (3):Calculating the volume of a regular shaped solid object
On calculating the volume of solid objects like a regular box
or cardboard, we measure the value of length, width and height.
The product of multiplying these values equals the volume of
space occupied by the box or the cardboard.
With your classmates, use the
measuring ruler to measure the
dimensions of this box, then
calculate its volume.
Length = ................... centimeter
Width = ................... centimeter
Height = ................... centimeter
Volume of cuboid = height × Width × Length
Volume of the box = .................... Cm3
Activity (4): Estimating Volumes of irregular shaped solid objects
Have a graduated Cylinder containing
a quantity of water.
Record the reading of the level of water in
the cylinder, then gently place a small piece of
marble into the cylinder and continue adding
a number of marble pieces then record the
level of water in the cylinder each time you
place a marble piece in the following table.
Box (Cuboid)
Width Length
Height
What do you observe?
..............................
Conclusion: ....................
......................................
If an object is submerged
in a measuring cylinder
containing water, water
raises up with a volume
equals the volume of the object
Liquid volumes measuring • unit is:
liter or milliliter
Liter = 1000 milliliter or = 1000cm3
• Solid volumes measuring unit is
the Cubic meter (m3) or the cubic

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