Grade 7 Lesson
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Homework:
G&L Final exam Monday, December 9th
Word Finder Dictionary!
the Online Etymological Dictionary
G&L Week 1-10 Answer Key
Flashcards due on the 10th.
Bring in cans and materials for our STEM Project
Today’s Agenda:
Finish Make-ups: G&L Week 10 Quiz
Final exam on the 9th.
Flashcards due on the 10th.
The quiz will be passed back tomorrow.
Review Lab: PhET Exploring Specific Heat
located in GC
Specific Heat Notes:
in notebook
review and modify
Specific Heat
Specific heat measures how much thermal energy is needed to raise the temperature of an amount of a material by 1 degree.
high specific heat means a material needs a lot of thermal energy to heat up
heats slowly
contains many enery units at a given temperature
water
Low Specific Heat means a material needs relatively little thermal energy added to heat up.
heats up quickly
contains fewer units of thermal energy at a given temperature.
air
Thermal Expansion and Contraction
Materials expand (grow) and contract(shrink) based on their temperature.
When heated, particles move faster and spread out.
material expands
When cooled, particles slow and become closer together.
material contracts.
The thermal expansion/contraction of a material is a characteristic property.
each material has its own rate of expansion/contraction
Table of Thermal Expansion Coefficients
Weird Units
10⁻⁶ m/(m °C)