1. October 19, 2015 Objective: I will dissect my CBA to understand the content and format required to succeed on the MSP Entry Task: *Read pages 80-83 *Answer question 1 (pg 83) *Take out Your CBA Agenda: Lesson 5 – Temperature and Density 1) Density CBA - Dissection Online Book Lesson 5

2. Section 1 – Variables Questions 1-2 1. Which Variable was controlled (kept the same)? B – Temperature of water in hot *Variable(s) that stay the same from one trial to the next. 2. Which variable was manipulated (changed)? D – Density of the liquids in thermometers. *Variable that changes from one trial to the next. Only one manipulated variable per experiment. Also referred to as independent variable.

3. Section 1 – Variables Questions 3-4 3. Which variable was the responding variable? B – Increase in volume of liquids *Variable that is measured in the experiment. Also referred to as dependent variable 4. How could this experiment be more reliable? A- Run more trials *Data is reliable when it’s repeatable

4. 3 Part Conclusion Investigative Question: What is the effect of the density of liquids on the increase in volume of the liquids when heated? Part 1 - Answer The more dense a liquid is, the more the volume increased when heated. OR The lower the density of a liquid, the smaller the increase in volume when heated. Part 2 – Cite/Support (WITH DATA!) When the density of the liquid was.95g/cm3 the volume increased by 1.63ml, the 1.0g/cm3 liquid increased by 1.67ml, and the 1.05g/cm3 liquid increased by 2.15ml. Part 3 – Explain When these 3 liquids were heated to 85 degrees C the most dense liquid ‘s volume increased the most and the least dense liquids volume increased the least.

5. Final Conclusion The more dense a liquid is, the more the volume increased when heated. When the density of the liquid was.95g/cm3 the volume increased by 1.63ml, the 1.0g/cm3 liquid increased by 1.67ml, and the 1.05g/cm3 liquid increased by 2.15ml. When these 3 liquids were heated to 85 degrees C the most dense liquid ‘s volume increased the most and the least dense liquids volume increased the least.

6. Energy Transfers Which property of the liquids changed as the liquids heated? C – Density Describe 2 energy transfers that happened during the investigation. 1- Electrical to Thermal (heat) From the wall to the hot pot 2 – Thermal to Kinetic (motion) Heating of liquids results in liquid moving up tube

7. Predictions How was the energy transferred throughout the water in the hot pot? B – Convection Predict the layers… Prediction – When the liquids are dumped into a large beaker, they will settle in order of decreasing density, starting with the least dense on the top. Explanation – This happens because substances with higher densities are heavier than substances with lower densities thus the heaviest, most dense, substance will always sink to the bottom.