Y2_T4_LSN_4.5

Get ready
  • Your Macbook (join the LessonUp)
  • Your notebook.
  • Your textbook.
  • Pen & highlighter
1 / 20
volgende
Slide 1: Tekstslide
ScienceMiddelbare schoolhavo, vwoLeerjaar 2

In deze les zitten 20 slides, met interactieve quizzen en tekstslides.

Onderdelen in deze les

Get ready
  • Your Macbook (join the LessonUp)
  • Your notebook.
  • Your textbook.
  • Pen & highlighter

Slide 1 - Tekstslide

Topic 4
Moving in the world

Slide 2 - Tekstslide

Plan for today
  • Explanation T4.5 Moving particles
  • (Make homework)
  • LAB: Temperatures effects in reactions

Slide 3 - Tekstslide

4.5 Moving particles

Slide 4 - Tekstslide

Learning goals
I can....
  • describe the three phases a substance can be in and list characteristics for each phase
  • name the transition between the different phases
  • identify phases and phase changes in a graph
  • describe how the addition or removal of heat changes the movement of molecules and how this can cause phase changes
  • describe the collision theory and how it affects reaction rate
  • describe how the change in temperature affects the functionality of enzymes

Slide 5 - Tekstslide

Key words
  • Diffusion
  •  Solid
  • Liquid
  • Gas
  • Collision theory
  • Rate of a reaction
  • Denaturation
  • Optimum temperature

Slide 6 - Tekstslide

Diffusion
The spreading of molecules is called Diffusion


Slide 7 - Tekstslide

States of matter
The kinetic energy of molecules determines their speed of movement and how far away molecules move from each other.  This determines the phase the matter is in.

We have three phases:
  • Solid
  • Liquid
  • Gas

Slide 8 - Tekstslide

Solid
- Fixed shape (crystal)

- Molecules are vibrating

- Not a lot of kinetic energy
         (Low temperature)

Slide 9 - Tekstslide

Liquid
- No fixed shape, Volume fixed

- More space between molecules and 
they shake a lot more (more kinetic energy)

- Medium kinetic energy
           (medium temperature)

Slide 10 - Tekstslide

Gas
- No fixed shape, no fixed volume

- Distance between molecules is big

- Velocity of molecules is high, Kinetic 
energy is high

Slide 11 - Tekstslide

A liquid has a fixed shape?
A
true
B
false

Slide 12 - Quizvraag

Phase transitions
Phase transition is a change of phase

Solid to liquid = Melting
Liquid to solid = Freezing
Liquid to gas = Evaporation
Gas to liquid = Condensation
Gas to solid = Deposition
Solid to gas = Sublimation

Slide 13 - Tekstslide

Phase transitions
During a phase change the 
temperature stays constant.

The temperature will not 
change until all molecules 
have transitioned.

Slide 14 - Tekstslide

A substance can change from solid to liquid. This is called a phase transition.
What is the name of this phase transition?
A
freezing
B
evaporation
C
melting
D
deposition

Slide 15 - Quizvraag

Collision theory

The movement of molecules is important for reacting.

Collision theory :
  • In order for molecules to react they have to collide with enough force to reach the activation energy. 
  • Temperature influences the rate of reaction because faster moving molecules have a higher chance of colliding with enough force to react.

Slide 16 - Tekstslide

Denaturation
If molecules collide too forcefully they can change shape. 

This is harmful for enzymes since they must fit perfectly into molecules in order to function.

Denaturation:  when enzymes change shape and don’t fit.


Slide 17 - Tekstslide

Optimum temperature

Optimum temperature:  where enzymes work fastest without denaturing

Slide 18 - Tekstslide

Homework
  • Study the glossary of 4.5
  • Complete the exercises of 4.5 (p.190 -195)


Slide 19 - Tekstslide

LAB: Temperatures effects in reactions
WARNING:  LAB = no warnings, misbehave --> 201

- Make a duo
- Get the worksheet from your teacher
- Grab your labjournal + Pen 
- Wait for your teacher to go to the lab

Slide 20 - Tekstslide