Tuesday, November 1, 2011

5.7 and 5.8

Instructions for Objective 5.7 and 5.8

1.    5.7 and 5.8 Starter.  Find out the names of the processes.  Research on the internet if necessary.  No need to blog this.

2.    5.7 and 5.8.  Forward this e-mail to your blog and type the answers into the e-mail.

3.    5.7 and 5.8 Experiment.  I’m afraid you can’t do the expt until we get back but watch the video clip to see how it’s set up and have a look at the graph of the results.

4.    5.7 to 5.10 Plenary 1.  Play the attached “States of Matter”

5.    5.7 to 5.10 Plenary 2.  Play the attached “Fill the trucks”

6.    PhET States of matter simulation - embedding into your Posterous blog.  Embed in your blog and then have a play

 

5.7 and 5.8 Starter

28 October 2011

11:00

·         What are the 6 processes shown by the arrows?

Image001

 

 

 

5.7 and 5.8

28 October 2011

10:20

·         5.7 understand that a substance can change state from solid to liquid by the process of melting

·         5.8 understand that a substance can change state from liquid to gas by the process of evaporation or boiling

·         Questions from Collins p.112

·         Answer in Bullet Points!

Image002

Image003

Q1. A) solids keep their shape because the particles are so tightly packed together that they only vibrate in their fixed position. Liquids don’t because they are less packed together because there is more kinetic energy and they are free to move in the shape of their container. Gases have so much kinetic energy that they have no fixed shape and are free to move anywhere.

b) Gases have a lot of kinetic energy, due to heat. This causes the particles to be less dense than liquids or solids and causes them to float and fill their entire container

Q3. Boiling happens when there is high temperatures in a liquid which cause the liquid to have more kinetic energy, evaporation occurs when temperatures go any higher than boiling point, or on the top of the liquid during boiling

·   Use following pages from Collins as a resource to help you

Image019

Image020

Image021

Image022

Image023

 

 

5.7 and 5.8 Experiment - Cooling Curve of Stearic Acid using datalogger

15 October 2010

14:34

 

 

 

Image024

 

 

 

 

5.7 to 5.10 Plenary 1

28 October 2011

12:19

 

 

 

·         Play the Stage 1 game to test your knowledge of solids, liquids and gases

·         Play the Stage 2 game to test your knowledge about changes of phase!

 

 

 

5.7 to 5.10 Plenary 2

28 October 2011

12:19

 

 

 

Play the Level 1 game to test your knowledge of the properties of solids, liquids and gases

 

Extension: Play the Level 2 game to extend your knowledge about changes of phase!

 

 

 

PhET States of matter simulation - embedding into your Posterous blog

28 October 2011

11:14

·        Create a post

Image016

·         Turn on HTML editor

Image017

·         Copy in this text and Publish

<div style="position: relative; width: 300px; height: 225px;">States of Matter

Click to Run
</div>

·         Success!  Now have a play with the simulation...

Image018

states of matter drag and drop plenary.swf Download this file

Fill the trucks - Properties of s,l,g.swf Download this file

5.9 and 5.10

 

 

 

·         5.9 recall that particles in a liquid have a random motion within a close-packed irregular structure

·         5.10 recall that particles in a solid vibrate about fixed positions within a close-packed regular structure

 

State

Particle

Picture

Arrangement of Particles

Motion of Particles

Other Properties

Solid

 

Image006

·         closely packed

·         regular pattern

·         vibrate about a fixed position

·         fixed shape

·         not easily compressed since particles are closely packed

·         Strong bonds

Liquid

 

Image007

·         closely packed

·         no pattern

·         free to flow over each other

·         takes shape of its container

·         can be packed

·         not easily compressed since particles are closely packed

·         Weak bonds

Gas

 

Image003

·         widely spaced

·         no pattern

·         very fast moving

·         random directions

·         fills its container

·         can be packed

·         easily compressed since its particles are far apart

·         Very weak bonds

s,l,g animation.swf Download this file

Monday, October 24, 2011

5.6

5.6

07 October 2011

10:40

·         5.6 recall and use the relationship for pressure difference:

 

        pressure difference = height × density × g

                               ∆p = h × ρ × g

 

 

∆p = pressure of the fluid (N/m2 or Pa)

h = height of the fluid (m)

ρ = density of the fluid (kg/m3)

g = gravitational field strength (N/kg)

5.6 Demo - squirting water column

5.6 Demo - squirting water column

12 October 2011

07:24

Image001

·         The bottom hole squirts water the furthest

·         Because the water at the bottom has the greatest pressure

·         Because in the formula ∆p = h × ρ × g, ρ is constant, g is constant and h is large

·         So ∆p = large

5.5 Demo 2 - Collapsing Bottle

5.5 Demo 2 - Collapsing Bottle

12 October 2011

07:19

·         Collapsing Bottle

 

Image001

5.5 Demo 1 - Magdeburg Hemispheres

5.5 Demo 1 - Magdeburg Hemispheres

12 October 2011

07:19

·         Magdeburg Hemispheres

 

Image001

·         And here are the horses I was talking about!

5.5

·         5.5 understand that the pressure at a point in a gas or liquid which is at rest acts equally in all directions

 

 

<<Pressure Underwater.wmv>>