What’s Our Effect On The Water Cycle
Year 7 & 8 TOC Water in nature Our effect on the water cycle LO: Exploring how human management of water impacts on the water cycle By now you’ve probably realised that there’s quite a few things which can affect the water cycle. While nature plays a big part in how the water cycle works, […]
The Water Cycle Across The Globe
Year 7 & 8 TOC Water in nature Nature & the water cycle LO:Investigating factors that influence the water cycle in nature Water has been cycling around the earth since it was first formed and while the amount of water hasn’t changed, how the water cycles is influenced by many factors, like temperature and wind. […]
What Is The Water cycle
Year 7 & 8 TOC Water in nature The water cycle LO: Explain the water cycle As you learnt in the previous section, water can change into different states. This is important to know since water in found in all 3 states all over the world. Without waters ability to change states, life as we […]
11.1.1: States of water
Year 7 & 8 TOC Water in nature States of water LO: Considering the water cycle in terms of changes of state of water As you have already learnt, substances can exist in different states: Solid, liquid and gas. Water is no exception. Freezing When water freezes and becomes ice, the point at which it […]
Wow: Wastewater treatment plants
Year 7 & 8 TOC Wow science Wastewater plants In Australia we consume roughly 92 500 000 litre per day. Since we have a population of around 25 million, we need to make sure everyone has access to water. Apart from Antarctica, Australia is the driest continent in the world. 35% of it receives so […]
5.2.4: Separating mixtures: Chromatography
Year 7 & 8 TOC Separating mixtures CHROMATOGRAPHY LO: Investigating and using a range of physical separation techniques such chromatography Something we discussed earlier in this chapter is solubility. Solubility is how easily a substance dissolves in a solvent. Knowing how well different substances in a mixtures dissolve in the solution is the basis for […]
5.2.3: Separating mixtures: Evaporation, distillation & CRYSTALLISATION
Year 7 & 8 TOC Separating mixtures EVAPORATION, DISTILLATION & CRYSTALLISATION LO: Investigating and using a range of physical separation techniques such as evaporation, distillation and crystallisation Think about salt water. Salt water is a mixture of salt dissolved into water. Using filtration, flotation or sedimentation won’t work to separate the two. So what can […]
5.2.2: Separating mixtures: Filtering and Centrifuging
Year 7 & 8 TOC Separating mixtures Filtration and centrifuging LO: Investigating and using a range of physical separation techniques such as filtration and centrifuging Sometimes waiting or trying to decant a mixture isn’t enough. You may need to separate the particles through different methods. Filtering and centrifuge are two good method for separating large […]
Wow: WW1 Gas masks
Year 7 & 8 TOC Wow science Gas masks in war World War 1, aka, the first world war was fought between the 28th July 1914 to the 11th November 1918. During this time we saw an advancement in military technology and medical knowledge. Some of the notable inventions at this time were poison gas, […]
5.2.1: Separating mixtures
Year 7 & 8 TOC Separating mixtures Separation techniques LO: Investigating separation techniques such as flotation, decantation, sedimentation and magnetic seperation Since mixtures are a combination of different types of substances there are different ways we can separate them back into their original substances. The technique we use to separate them depends properties of the […]
