Instructions for Objective 5.12 and 5.15 1. 5.12+5.15 Starter. Watch the video and think about the question. No need to type anything. 2. 5.12+5.15 Questions. Open the animation. Forward this e-mail to your blog and complete the questions. 3. 5.12+5.15 Plenary. Open the attached ppt. View as slide show. Think about what the blanks in the table are. Check your answers with slide 2. No need to type anything. 4. Answers to step 2 will be sent separately. Don’t look at them until you’ve done the work! Best wishes, Mr B 5.12+5.15 Starter 02 November 2011 16:15 > Questions
· Why does the needle on the meter move when gas particles are introduced into the box?
· What does the meter measure? Answers
· The gas particles collide with all of the walls of the container. The wall on the right moves outwards and moves the needle.
· Pressure. The gas particles colliding with the walls makes a force on the walls. The walls have a surface area so the quantity measured is pressure, p=F/A. 5.12+5.15 Questions 02 November 2011 15:55
· 5.12 recall that molecules in a gas have a random motion and that they exert a force and hence a pressure on the walls of the container
· 5.15 understand that an increase in temperature results in an increase in the speed of gas molecules
[cid:image001.png@01CC9986.E18EA0B0] Try the animation http://www.lon-capa.org/~mmp/kap10/cd283.htm
1. How do the particles create a pressure?
2. If you increase the temperature, how does the movement of the particles change?
3. If you increase the temperature, how does the number of collisions per second change?
4. If you increase the temperature, what does this do to the pressure? 5.12+5.15 Plenary 02 November 2011 15:55 > 
· Why does the needle on the meter move when gas particles are introduced into the box?
· What does the meter measure? Answers
· The gas particles collide with all of the walls of the container. The wall on the right moves outwards and moves the needle.
· Pressure. The gas particles colliding with the walls makes a force on the walls. The walls have a surface area so the quantity measured is pressure, p=F/A. 5.12+5.15 Questions 02 November 2011 15:55
· 5.12 recall that molecules in a gas have a random motion and that they exert a force and hence a pressure on the walls of the container
· 5.15 understand that an increase in temperature results in an increase in the speed of gas molecules
[cid:image001.png@01CC9986.E18EA0B0] Try the animation http://www.lon-capa.org/~mmp/kap10/cd283.htm
1. How do the particles create a pressure?
2. If you increase the temperature, how does the movement of the particles change?
3. If you increase the temperature, how does the number of collisions per second change?
4. If you increase the temperature, what does this do to the pressure? 5.12+5.15 Plenary 02 November 2011 15:55 >
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