Science 14 Lesson Plan #2: Heat and Temperature LAB
Subject: Science 9 Unit D: Energy Transfer Technologies Date: Tues March 10Teacher: Grace Martin Time: 90 min
GLO 1: Describe how natural and technological cooling and heating systems are based upon the transfer of thermal energy (heat) from hot to cold objects
Specific Outcome 1.3: describe the particle model of matter in which every object consists of particles in motion, and describe the effect of temperature on this motion (e.g., observe Brownian motion)
Lesson Objectives: By the end of the lesson, students will be able to:
· Understand how friction and heat are connected
· Describe the particle model of matter
· Describe the effect of Brownian motion
· Identify the difference between heat (thermal energy) and temperature (kinetic energy)
Materials/Resources:
Science Connect Textbook 5.1 The Nature of Heat Page 82-83, 5.2 Heat and Temperature P86
YouTube Videos
Powerpoint presentation
Preparation/Adaptations:
Magic milk: Tupperware, milk, food colouring, soap, Q-tip
Friction experiment books, pen, hand towel, plastic.
Adaptations:
Learning strategies. Visual = PowerPoint images. Auditory = direct instruction
Read/Write = taking notes
Collaborative and Kinesthetic = Heat experiments
Lesson Procedure:
Review 10:10 am: Thermal Energy is heat. Heat moves from hot to cold objects. Convection, conduction, and radiation are the three ways that heat is transferred. Hand back quick quiz from previous day and go over it.
PowerPoint Slides 1-6. Why does hot air rise? It is less dense because it expands. Blow up a balloon and pop it by holding a flame underneath the plastic.
PowerPoint Notes 10:20 am on Friction.
Friction Experiment: set up a stack of textbooks. Roll a pen/ball/toy car down the textbook. How does the speed change with different surfaces? Drape a hand towel, plastic sheet protector, paper covered with duct tape, paper bag, thick rubber bands, felt, etc
Rainbow milk hook 10:35 am: Today we are also learning about heat transfer and kinetic energy, the energy of movement. Everything is always in motion. To illustrate motion we are going to create magic rainbow milk. The tray of milk and drops of food colouring stabilize on the table and seem to be motionless. But as soon as a Q-tip dipped in soap is touched to the milk surface, it spreads out. This demonstrates motion and particle interaction, as we will discuss.
PowerPoint Notes 10:45 am: Students take notes as teacher explains.
Kinetic Energy is the energy of motion. Kinetic means movement. Kinetic energy is a measure of how much particles are moving. Hotter water means that particles move faster. Therefore temperature is the average of all kinetic energies of all particles in an object.
Trivia 11:00 am: Split class into three groups (With 3-4 students each)
Tea Bag Rocket 11:20am Explanation and exploratory station
Quick Quiz 11:25am-11:40.
Heat Experiments [extra]: have exploratory stations and lab report for Heat Lab
Survival: You are abandoned in the wilderness in the winter and need to stay warm. You only have an aluminium can, toilet paper, rubbing alcohol, and matches. How do you stay warm?
Hot air rises: spiral paper above a light bulb
Teabag rocket: light the teabag on fire
Formative Assessment:
Quick Quiz, heat experiment lab report
Heat transfer experiments:
Conduction
Two glasses to support an iron rod (golf club)
A lighter
Wax pieces from a candle
Light a candle underneath the rod. Put a piece of wax on top of the metal
Convection
Ice cube in a spoon, held over the candle
Science Experiment: Conduction, Convection and Radiation.
Conduction: melting ice cube in your hand
Convection: potassium permanganate in water, start heating from the bottom to see the flow of water in convection cycle (maybe I could use very light beads?)
Radiation: put ice cube out on table
Conduction: hot popcorn pan
Convection: Popcorn popper, with butter on top to melt
Radiation: microwave to pop popcorn
Convection demos https://www.youtube.com/watch?v=WEDUtS0IMws
Watch Hot Air Rise
Hot air rises: Place a few inches of water in the bottom of the bottle and heat it.
Heat in a can with rubbing alcohol and toilet paper
Heat a room with a ceramic pot and candle
Rice-in-a-sock Hot Pack in microwave for 40 seconds
Teabag Rocket
Take an unused tea bag and empty it of its contents. (Just take out the staple, and unfold it.)
Light the top with a lighter and watch as it rises. How it works: “Everyone knows that hot air rises and this experiment demonstrates that idea as well as the principles of convection currents. As the tea bag burns, hot air is being created, as well as a thermal, or convection current, under the bag. When the tea bag burns down into a small enough ball of ashes, the convection current causes it shoot up in the air.”
S’mores from a solar oven: pizza box with tin foil
Calorimetry: Burn one of the candies in a foil container
Air Pop: Why does a balloon explode when you hold it over a candle? The hot air expands.
Here is one balloon that doesn’t pop, if it is half-full of water.
Science 14 Unit D
Name: ______
Date: ______
QUICK QUIZ #2
Friction occurs when two objects are rubbed together. Friction creates heat at the point where the two objects touch. The moving objects create kinetic energy by:
a) sliding quickly
b) resisting each other
c) making it impossible to move
d) vibrating according to Brownian motion
Brownian motion is:
a) the jiggling or vibrating motion of particles
b) frictional movement that generates thermal energy as heat
c) particles getting into a fist fight to the death with one another
d) random movement of the human eye, suspiciously darting around
What happens to particles as we increase the temperature of a substance?
a) Particles move slower
b) Kinetic energy of the particles decreases
c) The increased thermal energy makes the particles move abnormally
d) The increased thermal energy increases the substance’s kinetic energy, causing the particles to move faster
What does the particle model of matter state?
1. All matter is ______
2. Particles are in ______