1. Vocabulary – Density Lab Mass A measure of the amount of matter contained in a physical body.

2. Mass on Earth

3. Mass on the Moon

4. Mass today is weight measured in grams

5. Volume The amount of space occupied by a three-dimensional object. Vocabulary – Density Lab

6. Volume Calculated Length (L) x Width (W) x Height (H)

7. Volume Calculated Today you will be measuring cubes and calculating volume. Measure with a metric ruler.

8. Centimeters are 10 times larger than millimeters so it takes more millimeters for the same length 1 centimeter = 10 millimeters Example not to scale 1 mm 1 cm 40 41 40 Volume Calculated Measure First

9. Vocabulary – Density Lab Density The measure of a mass of a substance per unit volume…..Mass divided by Volume

10. Vocabulary – Density Lab Graduated Cylinder A narrow, cylindrical, container marked with horizontal lines to represent units of measurement and used to precisely measure the volume of liquids.

11. Top Image: http://www.tea.state.tx.us/student.assessment/resources/online/2006/grade8/science/images/20graphicaa.gif Bottom Image: http://morrisonlabs.com/meniscus.htm We will be using graduated cylinders to find the volume of liquids and other objects. Read the measurement based on the bottom of the meniscus or curve. When using a real cylinder, make sure you are eye-level with the level of the water. What is the volume of water in the cylinder? _____mL What causes the meniscus? A concave meniscus occurs when the molecules of the liquid attract those of the container. The glass attracts the water on the sides. Volume Measured

12. Images created at http://www.standards.dfes.gov.uk/primaryframework/downloads/SWF/measuring_cylinder.swf What is the volume of water in each cylinder? Pay attention to the scales for each cylinder. Volume Measured

13. Click here for an online activity about volumeClick here for an online activity about volume. Choose Lessons  Volume & Displacement 10 cm 9 cm 8 cm We can calculate the volume of a regular object using the formula length x width x height _____ X _____ X _____ = _____ http://resources.edb.gov.hk/~s1sci/R_S1Science/sp/e n/syllabus/unit14/new/testingmain1.htm We can measure the volume of irregular object using water displacement. Amount of H 2 O with object = ______ About of H 2 O without object = ______ Difference = Volume = ______ Volume Measured