*COMMON MEASUREMENT TOOLS USED IN THE BIOLOGY LAB

*Graduated Cylinder

This tool is used to measure the VOLUME of a liquid.

The proper way to read this tool is at EYE LEVEL at the bottom of the MENISCUS, which is the curved surface of the liquid.

*What is the curved surface of the liquid called in a graduated cylinder?

MENISCUS

1) 7 mL

2) 38 mL

3) 33 mL

4) 20 mL

What is the volume of the rock?

5) 20 mL

*METRIC RULERMetric rulers are used to measure length, width, and height.

The LARGE numbers on the ruler are CENTIMETERS. The small lines between the centimeter marks are called MILLIMETERS.

There are TEN (10) millimeters in a centimeter.

*What do the NUMBERED lines on a metric ruler represent?

What do the SMALL lines between the numbered marks represent?

CENTIMETERS

MILLIMETERSHow many millimeters in a one (1) centimeter?

10 mm

*What is the length of the screw in centimeters?

In millimeters?

5.1 centimeters (5.1 cm)

5.1 cm X 10 = 51 millimeters (51 mm)

*Celsius Thermometer

Thermometers are used to measure TEMPERATURE.

Since scientists use the METRIC SYSTEM, they use thermometers that measure degrees Celsius rather than degrees Fahrenheit.

*What is the temperature in degrees Celsius?

17 degrees C

*ELECTRONIC BALANCE

An electronic balance is used to measure the MASS of an object.

It is a more PRECISE tool than a triple beam balance because it can record mass to the hundreth of a GRAM.

*Record the mass of the items.

To the nearest WHOLE number:

45 grams (45 g)

To the nearest tenth:

45.2 grams (45.2 g)

*Safety Tools Used in the Biology Lab

1.GOGGLES – Protect Eyes

2. GLOVES –

Protect Skin

3. APRON –

Protect Clothes

*Safety Tools Used in the Biology Lab

TEST TUBE RACK

Used to support test tubes during experiments

TEST TUBE HOLDER

Used to hold hot test tubes or while heating a test tube over a flame

*Safety Tools Used in the Biology Lab

TONGS – Used to safely handle hot beakers

SAFETY SHOWER – To wash chemicals off if they splash on skin

EYE WASH STATION – To flush eyes

*Glassware & Other Tools Used in the Biology Lab

BEAKER – Used to transfer and/or mix larger volumes of liquid

FLASK – For mixing and heating liquids; Narrow neck helps prevent splashing

*Glassware & Other Tools Used in the Biology Lab

TEST TUBES

STOPPERS (corks)

TEST TUBE RACK

*Glassware & Other Tools Used in the Biology Lab

EYE DROPPER (PIPETTE) –

Used to transfer very small amounts of liquid

TEST TUBE

*Glassware & Other Tools Used in the Biology Lab

------- HOT WATER BATH – A way to safely heat chemicals in test tubes

NOTE: Test tubes should NEVER be stoppered while being heated

------BUNSEN BURNER – Used to heat things over a flame

*Glassware & Other Tools Used in the Biology Lab

CHEMICAL INDICATORS are used to test materials for the presence of various substances such as:

* GLUCOSE (Benedicts)

* STARCH (Iodine)

* ACID (Blue Litmus Paper)

* BASE (Red Litmus Paper)

*Dissecting Tools Used in the Biology Lab

Dissecting Kit

RULER

SCALPEL

FORCEPS

SCISSORS

PIPETTE

PROBES

*Dissecting Pan