1. Properties of Matter Physical Properties, Phases of Matter, Chemical Properties

2. General (Physical) Properties Physical properties may be observed without changing the nature of the matter. Boiling point is a physical property  When a liquid boils, the vapor may be condensed to get the liquid back  The liquid is still the same substance

3. What are some Physical Properties? Properties you can see, such as color, shape, hardness, and texture Properties that are easily measured, such as mass, volume, density, melting point, boiling point  Note! Freezing and melting point are the same temperature!  Density = Mass ÷ Volume Is the ability to be attracted to a magnet a physical property?

4. How do we measure mass and volume? Mass is measured on a balance or scale. Common units are grams, milligrams, and kilograms Mass is measured on a balance or scale. Common units are grams, milligrams, and kilograms Liquid volume is measured with a graduated cylinder. Common units are liters and milliliters Liquid volume is measured with a graduated cylinder. Common units are liters and milliliters Solid volumes may be calculated with formulas or by water displacement Common units are cm 3 or milliliters. Solid volumes may be calculated with formulas or by water displacement Common units are cm 3 or milliliters.

5. Let’s Stop and Practice I’m going to give a regular solid to you and your partner. I’m going to give a regular solid to you and your partner. Use the balance to find the mass of your regular solid. Use the balance to find the mass of your regular solid. Record your answer. Be sure to include a unit. Compare your answer to your partner’s answer. Record your answer. Be sure to include a unit. Compare your answer to your partner’s answer. Keep your measurement where you can find it. You’ll need it again later. Keep your measurement where you can find it. You’ll need it again later.

6. Let’s Stop and Practice! Now, find the volume of your regular solid. Now, find the volume of your regular solid. Measure the length, width, and height of your object. Measure the length, width, and height of your object. Use the formula for finding the volume of your solid: L x W x H. Show your work! Use the formula for finding the volume of your solid: L x W x H. Show your work! Compare your measurement with your partner’s measurement. Do they match? If not, why? Compare your measurement with your partner’s measurement. Do they match? If not, why?

7. Let’s Calculate! Now you have all of the information you need to calculate the density of your regular solid. Now you have all of the information you need to calculate the density of your regular solid. Show your work! Show your work! Compare your calculation to your partner’s calculation. Do they match? If not, why? Compare your calculation to your partner’s calculation. Do they match? If not, why?

8. Finding Volume by Water Displacement A wooden block raises the level of the liquid in the graduated cylinder from 150ml to 180ml. What is the volume of the block? 180ml – 150ml = 30ml

9. Let’s Practice! I’m going to give an irregular solid to you and your partner. Find the mass of your irregular solid. Record your measurement. Compare your measurement to your partner’s measurement. Do they match? If not, why? Keep this measurement. You’ll need it later.

10. Let’s Practice! Find the volume of the irregular solid by using the water displacement method. Record your measurement. Be sure to include a unit. Compare your measurement to your partner’s measurement. Do they match? If not, why? Keep your measurement. You’ll need it again later.

11. Let’s Calculate! Now it’s time to calculate the density of the irregular solid. Show your work. Compare your calculation to your partner’s calculation. Do they match? If not, why?

12. Important Information! 2) The density of pure water is 1gm/cm 3. It’s about the same for tap water. So if an object has a density of 3gm/cm 3, will the object float?

13. Let’s Predict! I’m going to give an object to you and your partner. Calculate its density. Show your work. When you and your partner have made your calculations, raise your hand. Make a prediction: Will your object float in water?