Measurement

Triple Beam Balance: Mass of Solids

Graduated Cylinder: Volume of Liquids

Metric Ruler: Length Thermometer: Temperature

Glassware

Beaker

Erlenmeyer Flask

Hold liquids while they are being stirred or heated

Follow these steps when finding the mass of an object...1. With nothing on the tray move all of the sliders to the zero position

and make sure that the pointer is lined up with the zero mark. 2. Place the object on the tray and adjust the sliders as described in

the picture above until the pointer is lined up with the zero mark again.  (Note: When the back two sliders are in a correct position they will be locked in one of the notches on the beam.)

3. Add the values that the three sliders are pointing at to determine the object's mass. 

1. What is the mass of the object on the balance?

2. What is the mass of the object on the balance?

3. What is the mass of the object on the balance?

4. What is the mass of the object on the balance?

Using the Graduated Cylinder

When reading a graduated cylinder,

1.Place the cylinder on a flat surface

2.Bend down to get your eye even with the meniscus

3.Read the BOTTOM of the meniscus

Remember to read the bottom of the meniscus

What is the volume of liquid in this cylinder?

What is the volume of liquid in this cylinder?

What is the volume of liquid in this cylinder?

• This picture shows a liquid in a ten milliliter graduated cylinder. What is the volume of the liquid?

• 6.6 ml

• 6.8 ml

• 7.0 ml

• 7.2 ml

The picture shows a student reading a graduated cylinder. Which change would help ensure that a more accurate measurement is made?

a. The student should be seated.

b. The cylinder should be held with two hands.

c. The student should be wearing insulated gloves.

d. The cylinder should be on a flat surface.

Measuring length using a meter stick or a ruler

The meter stick is divided into smaller units called centimeters.

Centimeters are divided into smaller units called millimeters

What is the thickness of the dime in cm? mm?

Using the Thermometer

Thermometers are used to measure the temperature of liquids

Thermometer

Thermometer

Fahrenheit Celsius

Some thermometers have 2 scales used to measure temperature. In science we only measure temperature in Celsius

When reading a thermometer you should have 1 estimated place.

What is the temperature on this thermometer?

24.0 oC

Bunsen Burner

Heating Source

Hot Plate

Hot Hands

Proper way to handle HOT glassware

Beaker Tongs

Proper Way to handle Hot glassware

Medicine Dropper

Dropper Bottles

Syringes

Equipment to Transfer Liquids

Funnel

• Assists in transferring liquids to containers with smaller openings

Test tube brushTest tube holders

Test tube rack

Test tubes

- holds liquids for observation or testing

Biology Lab Equipment

Microscope: used to enlarge an image

Dissecting scope

Microscope Slides: supports an item being examined under the microscope

Cover Slips: covers specimen on a slide

Depression Slides

Dissecting Equipment

Dissecting Scissors

Scalpel: used for cutting specimens being dissected

Dissecting Probes: used to prod the specimen

Forceps: used to hold or lift specimens

• Which piece of laboratory equipment is used for dissecting a flower's pistil?

Safety Equipment

Fire Extinguisher

Fire Blanket – stop, drop, and roll

Fire Blanket Box

Safety Shower

Eye Wash Station