What are things made of?

Everything is made from microscopic particles. They look and behave differently in solids, liquids and gases.

Solids:

  • they are close together

  • they are arranged in a regular pattern

  • they are held together by strong forces called bonds

  • they can vibrate in a fixed position

  • they cannot move from place to place

Property of solids Why they are like this
They have a fixed shape and cannot flow. The particles cannot move from place to place.
They cannot be compressed or squashed. The particles are close together and have no space to move into.

Liquids:

The particles in a liquid are:

  • close together

  • arranged in a random way

The particles in a liquid can:

  • move around each other

Property of liquids Why they are like this
They flow and take the shape of their container. The particles can move around each other.
They cannot be compressed or squashed. The particles are close together and have no space to move into.

Gases

The particles in a gas are:

  • far apart

  • arranged in a random way

The particles in a gas can:

  • move quickly in all directions

There are no bonds between the particles in a gas, so they are free to move in any direction.

Property of gases Why they are like this
They flow and completely fill their container. The particles can move quickly in all directions.
They can be compressed or squashed. The particles are far apart and have space to move into.

Change of state

Materials can change from solid, liquid or gas into another state.

Cooling curves

When something is cooling down, the heat energy it has is lost. When it goes from being a liquid to a solid, or a gas to a liquid, the graph shows a flat part.

Animation and test

 

Year 8 topic list

Light and Sound

  • Reflection of light
  • Refraction of light
  • Splitting light using a prism (dispersion)
  • Sound waves – amplitude, wavelength, frequency

How we Stay Healthy

  • Microbes
  • Uses of Microbes
  • Killing Microbes
  • Vaccines

What’s in a chemical reaction and chemical reactions

  • Atoms Elements and Compounds
  • Properties of Metals and Non-Metals
  • Mixtures and Rusting
  • Burning (combustion)

Calculating Forces

  • Forces acting on objects
  • Speed and Pressure
  • Distance-Time Graphs / Speed-Time Graphs
  • Moments
  • Word Equations

Systems for Survival and Are You Fit

  • Food Groups
  • Digestive System and Enzymes
  • Respiration
  • Circulatory system
  • Breathing system
  • Smoking
  • Exercise  – how and why it affects pulse
  • Drugs – types of drugs, testing drugs

Energy and Conservation

  • Energy Transfers and Sankey Diagrams
  • Producing electricity

Environmental Chemistry

  • Acid Rain and air pollution
  • Carbon Cycle and Global Warming
  • Biogas

Calculating Forces

  • Forces acting on objects
  • Speed and Pressure
  • Distance-Time Graphs / Speed-Time Graphs
  • Moments

Year 7 topic list

Topics we have covered in Y7 this year

What are things made of?

  • Particle theory
  • Solid/Liquid/Gases
  • Change of state
  • Cooling curves

Staying alive

  • Cells
  • Cell division
  • Specialised cells
  • Cell organisation
  • Reproduction
  • Puberty

How do things move?

  • Forces acting on objects
  • Speed
  • Friction

How do things interact?

  • Food chains
  • Food webs
  • Pyramids
  • Energy transfers

Be reactive!

  • Acids and alkalis
  • Acids and carbonates
  • Metals and acids

Why are we different?

  • Adaptations
  • Competition
  • Predators and prey
  • Habitats
  • Variation
  • Classification

Electricity and Magnets

  • Series and parallel circuits
  • Magnets
  • Electromagnets

Changing Earth

  • Weathering
  • Erosion
  • Types of rocks
  • Rock cycle

 

End of year exam

Hello year 7 & 8! 

At the end of this year you will have a end of year test on EVERYTHING you have learned this year.

This blog will have revision notes for all of your topics.

Click on the links in the categories section to view different topics.

 

Good luck!