SI System (metric system)

Mass– The amount of matter

in an object

Volume– The space an object

takes up

Density– Amount of matter in a

given volume

– Mass/volume

Grams (g, kg, mg)

Liter (L, mL, mm3 , cm3)

g/mL, g/cm3, g/L, kg/L Density < 1.00 g/mL will floatDensity > 1.00 g/mL will sink

Scientific Measurement

Scientific MeasurementLength

Temperature– How hot something is.

– How much energy does something have.

Meters (m, mm, cm, km)

Celsius (Centigrade)

Kelvin ( K )

Laboratory Equipment

Write in the use of each object on the lines next to the picture.

Ring Stand and Iron Ring

Use: Iron rings connect Use: Iron rings connect to a ring stand and to a ring stand and provide a stable, elevated provide a stable, elevated platformplatform

ClampAttaches to the ring stand and holds test tubes.

Wire Gauze

Use: To support a container (such as a beaker or flask) during heating. Placed on ring.

Bunsen Burner & Striker

Use: Safely burns natural gas.

Safety Goggles

Use: to protect your eyes from chemicals and exploding glassware.

Test Tube

Use: Holds a small amount of solution (usually for heating)

   

Test Tube Tongs

Use: To hold / grab the test tube.

Spatula and Scoopula

Use: aid in the transfer of small amounts of solids

Crucible Tongs

Use: For handling hot, cold, corrosive, or sticky materials

Beaker

Use: For stirring, mixing and heating liquids.

Not used for measuring!

Erlenmeyer Flask

Use: To hold liquids and do reactions in it Used for swirling.

NOT USED in Measuring

Volumetric FlaskUse: To measure very precise amounts of liquid.

Evaporating Dish

uses:

Rapid evaporation

Burning chemicals in air.

Graduated Cylinder

Use: to measure volumes of liquids.

The red disk around the top is used to prevent breakage if knocked over.

Crucible

Use: for heating or melting compounds

Made of porcelain or metal

Clay Triangle

Use: Wire frame with porcelain used to support a crucible

Put on a iron ring and stand

Pipette (pipet)

Use: dispense small amount of liquids

Hot Plate

Use: heating substances