August 22, 2013 Thank you for not chewing gum  Today’s Agenda:

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August 22, 2013 Thank you for not chewing gum  Today’s Agenda: Bell work Volume lab Materials: Pencil, science notebook, science folder, Objective: Today we will practice measuring volume. Daily Question: What is volume and how is it measured?

What is Volume? Volume is the amount of three dimensional space an object takes up. Volume can be measured in two ways… with a ruler or by using water displacement.

What is water displacement? Water displacement is a technique used to find the volume of irregular solids by looking at how much water is displaced (pushed aside) by the item. Discovered by Archimedes.

The story takes place some 2,200 years ago when King Hieron II in Sicily gave a jeweler a bar of gold and ordered him to make it into a crown.

Measuring Volume of a regular solid If the object has straight sides you can use a ruler to measure the length x width x height. Use mm, cm or m to make your measurements

Reading a graduated cylinder What is the meniscus? When reading a graduated cylinder remember to get down to eye level.

Practice What is the water level in this graduated cylinder?

Measuring Volume of an irregular solid Hold the object up to the graduated cylinder to see how much water you need to cover the object. Pour water in the graduated cylinder to the point needed to cover the object. Write down the measurement before the object is in the water.

Volume = After – Before Record answer in mL’s Gently place the object in the water by tilting the graduated cylinder slightly and sliding the object down the side. Measure where the water level is after the object has been added. Write down the measurement after the water has been added. Use the following formula to calculate the volume: Volume = After – Before Record answer in mL’s

Make a table to record your data STATION OBJECT LENGTH WIDTH (mL’s before) HEIGHT (mL’s after) VOLUME A Green box B Clothes Pin C Yellow box D Golf Ball E NONE… THIS IS WORK F Purple Box G Candle H Red Box I Rock