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Y2_T2_LSN2.2
HAVE READY:
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Macbook on KWIZL
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Science
Middelbare school
havo, vwo
Leerjaar 2
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HAVE READY:
Textbook & notebook closed
Macbook on KWIZL
Slide 1 - Slide
Practice quiz on Kwizl:
timer
20:00
8 min max practice quiz.
7 min max peer review and feedback.
5 min max write a reflection in your notebook:
What mistakes did I make?
Why were they mistakes?
What can I do better next time?
Slide 2 - Slide
TOPIC 2.2
ENERGY EFFECTS
P. 60-69
Slide 3 - Slide
§2.2 - Learning Goals:
P. 60-69
I can…:
explain the three different types of heat transfer.
identify which type of heat transfer is present in a situation.
explain the difference between conductors and insulators and describe how they should be used.
identify if a chemical reaction is exothermic or endothermic.
explain the effect of catalysts on chemical reactions.
Slide 4 - Slide
§2.2 - Key Words:
P. 60-69
Conduction
Conductors
Insulators
Convection
Radiation
Exothermic
Endothermic
Activation energy
Catalyst
Enzymes
Slide 5 - Slide
§2.2 - Conduction:
Conduction = heat transfer via direct contact.
Example = a pan transfers heat to food.
Slide 6 - Slide
§2.2 - Conduction:
Heat transfer through direct contact between the particles in a substance
Insulators:
not good at conducting heat - plastic, cork, air, wood
Conductors:
good at conducting heat - metals; copper, silver
Slide 7 - Slide
§2.2 - Convection:
Convection = heat transfer via air or water.
Example = radiator warms the air in a room
Slide 8 - Slide
Hot air has a lower density than cold air, therefore it will rise upwards
Cold air has a higher density than hot air, therefore it will sink
Slide 9 - Slide
§2.2 - Radiation:
Heat transfer in all directions through electromagnetic waves.
Radiation does not need a medium to go from one place to another.
Radiation can move through space
Slide 10 - Slide
§2.2 - Radiation:
moves in all directions
does not need medium
Slide 11 - Slide
Slide 12 - Slide
When a chemical reaction needs heat, it's called
endothermic.
Slide 13 - Slide
Chemical reactions that release thermal energy(heat) to the environment are called
exothermic.
Slide 14 - Slide
Homework for next time
:
Lablesson:
Study the parts of the bean.
LABJOURNAL - prepare for the experiment “Drawing a bean” from Growing bean project - HAVO / Growing bean project - VWO
Theory lesson:
Complete the exercise of Topic 2.1 (p.54-59)
Read Topic 2.2 (p. 60-63)
Study the glossary of Topic 2.2 on Studygo.
LABJOURNAL: prepare for the experiment: Exothermic vs endothermic reaction
Slide 15 - Slide
Exothermic vs Endothermic
:
GET READY:
your lab partner
pen/pencil
your labjournal
Slide 16 - Slide
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