Just A Phase Phases of Matter Inquiry

Just a Phase - Inquiry Properties of Matter – page Read Introduction Getting Started – In your lab group, discuss all of the questions under #1 A – F Complete Getting Started – Read and complete Question #2. Properties of Matter – page Read Introduction Getting Started – In your lab group, discuss all of the questions under #1 A – F Complete Getting Started – Read and complete Question #2.

Background Information: 1. Plasma is a fourth phase of matter. Plasma exists at high temperatures (such as those found in stars) and consists of ionized atoms. 2.Phase changes take place when molecules loose kinetic energy and come closer together (example: gases to liquids to solids) or gain kinetic energy and move farther apart (example: solids to liquids to gases). 3.Phase change is dependent on temperature and pressure (atm or air pressure determines at what temperature water will boil) Background Information: 1. Plasma is a fourth phase of matter. Plasma exists at high temperatures (such as those found in stars) and consists of ionized atoms. 2.Phase changes take place when molecules loose kinetic energy and come closer together (example: gases to liquids to solids) or gain kinetic energy and move farther apart (example: solids to liquids to gases). 3.Phase change is dependent on temperature and pressure (atm or air pressure determines at what temperature water will boil)

Background Information continued: 4.The temperature of the substance, NOT the temperature of the surroundings determines whether a phase change takes place (example: snow or ice does not instantly turn to water when the temperature rises above 0 ⁰ C or the water in your swimming pool does not instantly evaporate when it is over 100 ⁰ C in the summer ). 5.An object must absorb heat energy to rise in temperature. Background Information continued: 4.The temperature of the substance, NOT the temperature of the surroundings determines whether a phase change takes place (example: snow or ice does not instantly turn to water when the temperature rises above 0 ⁰ C or the water in your swimming pool does not instantly evaporate when it is over 100 ⁰ C in the summer ). 5.An object must absorb heat energy to rise in temperature.

Materials Required Alcohol Burner Burner Stand Thermometer 250 mL Beaker 3 – 4 ice cubes Water Stopwatch Materials Required Alcohol Burner Burner Stand Thermometer 250 mL Beaker 3 – 4 ice cubes Water Stopwatch Student Jobs 1 – Measure the temperature 1 – Monitor the time 2 or 3 – Record the temperature and make observations. Student Jobs 1 – Measure the temperature 1 – Monitor the time 2 or 3 – Record the temperature and make observations.

Procedures: 1.Mrs. Joshu will demonstrate how to use the burner stand and alcohol burner to heat a liquid. Illustrate (in your lab book) how the assembled alcohol burner apparatus should look. 2.Pour cold tap water to a depth of 1 cm, into the bottom of the beaker. 3.Collect 3 or 4 ice cubes and add them to the beaker. 4.Place the thermometer in the ice water and allow it to stand for a few minutes. Keep the bulb of the thermometer in the water throughout the entire heating process. Procedures: 1.Mrs. Joshu will demonstrate how to use the burner stand and alcohol burner to heat a liquid. Illustrate (in your lab book) how the assembled alcohol burner apparatus should look. 2.Pour cold tap water to a depth of 1 cm, into the bottom of the beaker. 3.Collect 3 or 4 ice cubes and add them to the beaker. 4.Place the thermometer in the ice water and allow it to stand for a few minutes. Keep the bulb of the thermometer in the water throughout the entire heating process.

Procedures continued: 5.Take the temperature of the ice water before they start heating with the burner. This will be the temperature at time 0 in Table 1 on the student sheet. 6.As soon as the temperature has been taken, start heating the ice water with the burner (as shown in your illustration of the alcohol burner apparatus). 7.Take temperature readings every 30 seconds. Make notes in column 3 of the table of any observations considered to be relevant. Procedures continued: 5.Take the temperature of the ice water before they start heating with the burner. This will be the temperature at time 0 in Table 1 on the student sheet. 6.As soon as the temperature has been taken, start heating the ice water with the burner (as shown in your illustration of the alcohol burner apparatus). 7.Take temperature readings every 30 seconds. Make notes in column 3 of the table of any observations considered to be relevant.

Procedures continued: 8.Continue to heat the water, taking the temperature and recording observations for 3 minutes after it has started to boil. 9.When you have completed heating, extinguish the burner and allow the apparatus to cool for a minimum of 10 minutes. The beakers should then be emptied. Important Safety Requirements 1.Tie back long hair. 2.Safety goggles must be worn. 3.Be careful handling hot apparatus! Procedures continued: 8.Continue to heat the water, taking the temperature and recording observations for 3 minutes after it has started to boil. 9.When you have completed heating, extinguish the burner and allow the apparatus to cool for a minimum of 10 minutes. The beakers should then be emptied. Important Safety Requirements 1.Tie back long hair. 2.Safety goggles must be worn. 3.Be careful handling hot apparatus!

Still MORE Procedures: 10. All members of the group should have a complete record of the results. 11.Plot the results of your data on the Student Sheet 7.1. Make sure that you have everything labeled correctly. 12.Annotate the graph with observations (example: “all of the ice melted” or “the water started to boil”). 13.Turn to page 67 in the Properties of Matter Book. Answer questions 1 and 2 in the “Reflecting on What You’ve Done” Section. Still MORE Procedures: 10. All members of the group should have a complete record of the results. 11.Plot the results of your data on the Student Sheet 7.1. Make sure that you have everything labeled correctly. 12.Annotate the graph with observations (example: “all of the ice melted” or “the water started to boil”). 13.Turn to page 67 in the Properties of Matter Book. Answer questions 1 and 2 in the “Reflecting on What You’ve Done” Section.