Y2_T2_LSN2.2

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Slide 1: Tekstslide
ScienceMiddelbare schoolhavo, vwoLeerjaar 2

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HAVE READY:
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Slide 1 - Tekstslide

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 - Tekstslide

HW for today:
timer
20:00
  • Check your hw exercises.
  • Use a different colour.
  • Show your work to get a sticker.

Slide 3 - Tekstslide

TOPIC 2.2

ENERGY EFFECTS
P. 60-69

Slide 4 - Tekstslide

§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 5 - Tekstslide

§2.2 - Key Words:
P. 60-69
  • Conduction
  • Conductors
  • Insulators
  • Convection
  • Radiation
  • Exothermic
  • Endothermic
  • Activation energy
  • Catalyst
  • Enzymes

Slide 6 - Tekstslide

§2.2 - Conduction:
  • Conduction = heat transfer via direct contact.
  • Example = a pan transfers heat to food.

Slide 7 - Tekstslide

§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 8 - Tekstslide

§2.2 - Convection:
  • Convection = heat transfer via air or water. 
  • Example = radiator warms the air in a room

Slide 9 - Tekstslide

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 10 - Tekstslide

§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 11 - Tekstslide

§2.2 - Radiation:

  • moves in all directions
  • does not need medium


Slide 12 - Tekstslide

Slide 13 - Tekstslide

When a chemical reaction needs heat, it's called endothermic.

Slide 14 - Tekstslide

Chemical reactions that release thermal energy(heat) to the environment are called exothermic.

Slide 15 - Tekstslide

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 16 - Tekstslide

Exothermic vs Endothermic:
GET READY:

  • your lab partner
  • pen/pencil
  • your labjournal

Slide 17 - Tekstslide