Volume

• What is volume:_______________________________________

_______________________________________________________________________________________________________________

Units of Volume• Millilitre (_______)• Litre (____)• Cubic centimetres (_____)• Cubic millimitre (_____)• Cubic meter (______)

1 mL = 1 cm3

Taking a reading on a graduated cylinder

• To know the value of each graduation:- Find two major ______________________. - __________________them from eachother. - Divide by the number of _____________. Example:

-Two major graduations25 and 30

-So 30 – 25 = 5-There are 5 spaces so:

5 / 5 = 1- Each graduation is worth 1.

A) Volume of a liquid• The instruments are:- ________________________________________

________________________________________

• The meniscus:When the liquid is not perfectly flat, it will curve alittle. You have to read under the meniscus.

Meniscus

Meniscus

________________

To measure 10 mL, you must pour 10 mL of water in the graduated cylinder and read under the menuscus.

_____________ ____________

You can try!

B) Regular solid (like erasers, boxes, etc.)

• Use a ______________ to measure the sides.• For a rectangular prism or cube, use the

following formula:V= ____________________________V= Cylinder: V=πXr2Xh.

π = 3.14 r = radius h = height

• Example : ____________________________

You can try!

2 cm

3 cm

5 cm

C) Irregular solid

• Example: a nail, a penny, an eraser, a paperclip etc.

• You will need a ________________________or an overflow can.

Water displacement method• Fill the graduated cylinder with ____________________and

write down the volume. (example 20 mL)• ______________________________into the cylinder and

read the new _________________.• ________________________ the first reading from the

second reading. The _______________________is the object’s volume.

You can try!

Volume = ______________________________________________________

Overflow can-Place a beaker under the overflow can - Fill up the overflow can until the water is overflowing. -Place the object in the can. - Collect the water that overflows and measure its volume.

Volume lab activityObject Volume measured

with a rulerVolume measured by water displacement

Small metal cylinder

Large metal cylinder

Rectangular prism

Marble

Rubber stopper