Chemicals In Our Lives C3 Flashcards
How is the earths crust made?
It is made very slowly by moving tectonic plates.
What has mountain building, erosion, sedimentation and dissolving led to?
It has led to the formation of raw materials.
What is Britain made from?
It is made from accident continents.
How is salt obtained?
Start is obtained by evaporating sea water and solution mining.
What is a positive and negative side to salt?
1) positive it makes food taste nicer.
2) negative it is bad for your health.
What does obtaining salt have an impact on?
The environment.
What do alkalis neutralise?
Acid soils.
What happens when you add chlorine to water?
It supplies killed microbes.
What do you creat when you separate sodium chloride?
You get hydrogen, chloride and sodium hydroxide.
What does electrolysis require?
It requires large amounts of electricity.
When you add plasticisers to PVC what happens?
It becomes more flexible.
What do life cycle assessment measure?
The energy and environmental impact of a product.
What do geologists look for and why?
Geologists look for fossils, shells fragments, grain shape and ripple marks for evidence of conditions when sedimentary rocks formed.
