Journal Entry:
1. Name at least 3 ways you can warm yourself on a cold day.
2. What do you think is the source of heat in a hand
warmer?
Learning Intentions
- We will learn the difference between endothermic and
exothermic processes.
- We will learn will be able to explain the sensory
experiences of hot and cold.
- We will discuss energy changes from a molecular
viewpoint.
Closing Task:
You can
determine if a process in endothermic or exothermic by the temperature change
that is observed.
Content Standards being covered in this unit:
Student can identify types of energy and explain energy changes.
Students can create a computational model to calculate the change in the energy
of one component in a system when the change in energy of the other component(s)
and energy flows in and out of the system are known (HS-PS3-1 and CCC Energy and
Matter)
Students can develop a model to illustrate that the release or absorption of
energy from a chemical reaction system depends upon the changes in total bond
energy.(HS-PS1-4 and CCC Energy and Matter) .
Students can develop and use models to illustrate that energy at the macroscopic
scale can be accounted for as a combination of energy associated with the
motions of particles (objects) and energy associated with the relative position
of particles (objects).(HS-PS3-2 and CCC Energy and Matter)
Students can plan and conduct an investigation to provide evidence that the
transfer of thermal energy when two components of different temperature are
combined within a closed system results in a more uniform energy distribution
among the components in the system (second law of thermodynamics) (HS-PS3-4 and
CCC Energy and Matter)