Science Starter (Week 14, Day 3, 5/4/16) Would you rather have a bucket of $100 or a pool full of $5? When you put money in the bank, do you put it in your savings account or your checking account? Is there a difference between these two accounts? The half life of carbon-14 is 5,000 years. If I started with a 200g sample, how much of it remains after 20,000 years? What is the name of C7H2?

Objective SWBAT explain the difference between heat and temperature SWBAT explain the difference between rising temperature and phase changes

Heating/Cooling Curves Notes Poster Book Work Time Agenda Science Starter Heat v. Temperature Heating/Cooling Curves Notes Poster Book Work Time

Unit 7: Heat and Energy Heat and Temperature Heating and Cooling Curves

Video: Heat vs. Temperature https://www. youtube. com/watch Video Summary At what temperature does water freeze? Boil? Which cup has more “hotness”? Why? Does the amount of molecules have anything to do with temperature (or “degree of hotness”)? ______ ____combined with ______________ = Heat (Quantity of Hotness)

You do not have to write this. Just listen. Consensus Energy is like money when you have a lot of money, you want to spend it. Money transfers from high  low) In the same way, energy flows from high energy  low energy (in this case, from hot plate to ice) In the same way that money can be deposited into different accounts, energy is deposited into different energy “accounts” These accounts have different purposes, do different things

Notes – Write!!! Consensus During a phase change, as energy is supplied to a system, it can be “deposited” into two different energy accounts: either thermal energy (Eth) or phase energy (Eph) Thermal energy acts to increase the temperature when only one phase is present. Phase energy acts to break down the attractions between particles that hold them together as solid, liquid, or gas, resulting in a phase change.

Quick Check! Are the following characteristics associated with PHASE ENERGY or THERMAL ENERGY? - increases temperature _____ - acts to break down the attractions between particles that hold them together as solid, liquid, or gas ___ - involved when only 1 phase is present____ - involved when the phase is changing ____

Phase Changes Solid  Liquid: Melting Liquid  Gas: Evaporation Solid  Gas: Sublimation Liquid  Solid: Freezing Gas  Liquid: Condensation Gas  Solid: Deposition

Heating Curve Temperature Heat added over time

Worksheet 1 A cup of hot coffee cools as it sits on the table. A tray of water (20°C) is placed in the freezer and turns into ice cubes. A can of cold soda warms as it is left on the counter. 100°C water you spilled on your shirt evaporates. Water vapor (100°C) in the room condenses on a cold surface. A pan of water (20°C) is heated to boiling and some of the water is boiled away.

Worksheet 1 Take the next 10 minutes to complete worksheet 1 SILENTLY and INDEPENDENTLY. Silent means NO talking. Raise your hand if you have a question. You should not be out of your seat. You may listen to your headphones.

Temperature: (degree of hotness) is a measure of speed of molecules Consensus Notes Temperature: (degree of hotness) is a measure of speed of molecules Heat: (quantity of hotness) is a measure of both the mass and speed of molecules. Transfer of energy due to thermal contact

Mini Poster Book Work Time Use this time to work on your Semester Mini Poster Book (Units 1-3 should be complete) Instructions and materials are located at the front table