All Science year7-year9

Cards are what i have learnt from year 7 till year 9.

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Burning metals

Burning metals

 

Different flames in bunsen burner

  • Safety - This flame is the most easiest to see.
  • Normal - This flame is unnoticable as you cannot see it.
  • Roaring - This flame is blue and purple. It is used to burn solids. The tip of the blue flame is the hottest.

 

Fire triangle

(http://upload.wikimedia.org/wikipedia/commons/thumb/2/20/Fire_triangle.svg/220px-Fire_triangle.svg.png)

The elements in the triangle create fire. Taking one of them out would not make fire.

Flamable - It means when something burns easily.

 

The bunsen burner

(http://www.homechemistry.org/images/Bunsen_diagram.gif)

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Fuels and Energy

Fuels and Energy

 

Fuels stores energy. Energy is released when fuels burn.

  • Charcoal is a fuel because it stores energy.
  • The body uses food as fuel.
  • Energy is measured in Joules (J).
  • The ideal fuel is easy to light. It also needs to burn for a long time and give out least smoke and ash.
  • Ethanol is one of the nest fuels

There is different types of energy, such as:

  • Heat energy
  • Movement energy
  • Sound energy
  • Light energy
  • Chemical energy
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Solids, Liquids and Gases

Solids, Liquids and Gases

Solids - There are only a few solids that can change to a liquid.When a solid   melts to change to a liquid this is called melting.

Liquids - When a liquid such as water changes, This is either called evaporation where the liquid turns in to a gas or solidification where the liquid turns in a solid.

Gas - When a gas souch as water vapour changes into a liquid, it is called condensation.Some gases can be dangerous such as carbon monoxide. Oxygen is breathed in by us. Carbon Dioxide (Co2) is taking in by plants to make oxygen.

(http://images.tutorvista.com/content/feed/tvcs/Particles-Solid_1.gif)

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