6.+Heetasha

__**﻿Conduction **__

Conduction is the transfer of thermal Energy between neighbouring Molecules. An example of a heat conduction is when you touch a hot water bottle.

__**Convection **__ __** ﻿ ﻿﻿ **__ Convection is the movement of molecules with in fluids and rheids. An example of heat convection is a radiator heater.

__**Radiation **__ __** ﻿ **__ Radiation is electromagnetic radiation emitted from material due to the temperature of the material or matter. An example of hear radiation is the sun on your skin.

__**Heat Experiment **__ The experiment showed that less the amount of fluid the higher the temperature goes. An example of this is when we heated the 40mL and 80mL oil the 40mL after temperature was higher by 8 degrees celcius.

RESULTS (for 100 mL Water):
of the liquid (° C) || Rise in temperature (° C) || Names in Group ||
 * |||| Temperature
 * ^  || Initial || Final ||^   ||
 * Colourless bottle || 21 || 27 || 6 || Liziana, Heetasha and Ann ||
 * Red can || 21 || 26 || 5 || Maddie, Eilish, Paula ||
 * Blue can || 21 || 25 || 4 || Amy Jessie Erin Priya ||
 * Blue can || 20 || 26 || 6 || Callayne Lily Chloe ||
 * Silver can || 21 || 24 || 3 || Sarah, Hra, Livvy ||
 * Silver can || 21 || 24 || 3 || Stefie, Greta, Kate, Gabby ||
 * Green can (long) || 21 || 27 || 6 || Stefie, Greta, Kate, Gabby ||
 * Black can (long) || 21 || 26 || 5 || Alice,Taylor,harriet,Tessa ||

CONCLUSION: 1. Describe one possible trend in the data. If you change the colour there is a possibilty that the temperature will change.

2. Explain why we can only say it is a 'possible' trend. We can only say it's a possible trend as it may not work or it may not be a correct trend.

DISCUSSION: 1. Explain the trend above in terms of how heat moves.

2. Discuss how the experiment could be improved The experiment could be improved by putting more liquid or a different liquid and leaving the can in the sun more longer.

** A Fair Test **
A 'fair test' is one in which you only change one thing (i.e. one variable). This called the **independent variable**. All other variables must be kept the same.

 ﻿ Your experiment results will often show something (i.e. another variable) changing. This is called a **dependent variable**. (It's value __depends__ on the thing you change)

e.g. Which cup of tea is the sweetest after adding 1 teaspoon of sugar?


 * [[image:http://polandian.home.pl/wp-content/uploads/2009/11/cup-of-tea.jpg width="229" height="177" caption="external image cup-of-tea.jpg"]] ||  || [[image:http://www.rukakuusamo.com/notesfromlapland/wp-content/uploads/2010/08/cupOfTea.jpg width="175" height="175" caption="external image cupOfTea.jpg"]] ||

If they have the same amount of sugar, surely this means they will have the same sweetness. Or does it? This is only true if the amount (volume) of tea is the same in each cup. To be really sure you will also need to make sure the tea is of the same type and kept at the same temperature too.