How to Use a Triple Beam Balance. 1

How to use a Triple Beam Balance. 1. Move weights until the balance is located on the ‘0’ mark. 2. Place object(s) on scale. 70 g 3. When scale is balanced, add 300 g up the 3 amounts for a TOTAL mass of the object. 3.3 g What would be the mass of the object measured in the picture?

______300 + ______70 + ______3.3 =

______373.3 g Triple Beam Balance LAB Materials: 1. Mass the block for practice and Triple beam record its mass. balance 2. Mass the beaker and then the marble in the beaker (OBJECT # 1) Beaker to determine the mass of the marble. Graduated cylinder 3. Measure 10 mL of water (OBJECT Safety glasses. # 2) into graduated cylinder. Pour Container with water into beaker and record its water mass. Use beaker mass from step 2. Paper towels 4. Pour water back into original container and dry out beaker. Marble 5. Pour baking soda (OBJECT #3) into Container of baking dry beaker and determine its mass. soda Use mass of beaker from step 2. scoopala blocks

Triple Beam Balance LAB Materials: 1. Mass the block for practice and Triple beam record its mass. balance 2. Mass the beaker and then the marble in the beaker (OBJECT # 2) Beaker to determine the mass of the marble. Graduated cylinder 3. Measure 10 mL of water (OBJECT Safety glasses. # 3) into graduated cylinder. Pour Container with water into beaker and record its water mass. Use beaker mass from step 2. Paper towels 4. Pour water back into original container and dry out beaker. Marble 5. Pour baking soda (OBJECT #4) into Container of baking dry beaker and determine its mass. soda Use mass of beaker from step 2. scoopala blocks

Clean up

1. Pour baking soda back into original container. 2. Paper towel in garbage. 3. Return items to basket. 4. Leave safety glasses and your paper on desk where you got them. Volume: the amount of space an object takes up

Things we might measure the

Volume of:

Solids

Liquids

Gases The basic units for volume are: LITER (L) or CUBIC METER (m3)*

*In this class we will use milliliters (mL) or cubic centimeters (cm3) Tools: ruler, meter stick, calipers, graduated cylinder, beaker Measuring Volume

1. Regular shaped object: • use a formula

2 cm 5 cm

10 cm Measuring Volume 2. Volume of a liquid: • Use a graduated cylinder • Meniscus: the curved line formed at the surface of the liquid

Measuring Volume (cont.)

3. Irregular shaped object • use liquid displacement How to find the volume of an irregular object

using liquid displacement. 1. 1st reading: Read and record the volume of the

liquid at the meniscus. (R1)

(liquid only) R1 = 65 mL

mL How to find the volume of an irregular

object using liquid displacement. 2. Add the object. 3. 2nd reading: Read and record the volume of the

liquid at the meniscus. (R2)

(liquid + object) R2 = 69 mL

mL How to find the volume of an irregular

object using liquid displacement.

4. Subtract the 1st reading from the 2nd reading to

get the VOLUME of the object. (V = R2 – R1)

69 mL – 65 mL = 4

mL Volume of object = 4 mL

mL mL Volume Problems Find the volume of:

1. a book whose length is 3 cm, its width is 5 cm and its height is 2 cm.

2. a box that is 10 cm by 2.5 cm by 3 cm.

3. the teeny tiny T–rex .

mL mL

THE END 2017 Inquiry PowerPoint