Science Exam 4

• Is a substance made up of two or more substance mixed together.

• Mixtures

• Energy

• Machines

• We can see the different components of to mixture.

• Heterogeneous Mixtures

• Homoheneos Mixtures

• We can not see the different componentsof the mixture.

• Heterogeneous Mixture

• Homogeneous Mixture

• Is the ability that some things have to produce a change. We use everythingwe do: our bodies need energy to grow, our cars need enery to move.

• Mixture

• Energy

• Machines

• There are four main forms of energy:

• heat, light, motion and electrical

• Non-renewable and renewable

• coal, oil, gas

• Make any job easier. They allow us to move, break, hold or lift with less effort.

• Simple Machines

• Compound Machines

Types of single Machines:

• A pulley, Screws, wedges, inclined planes...

• The level, The load, The fulcrum and The effort

• Types of levers:

• pulley, screws, wedges, inclined planes...

• Tweezer, Nutcracker, pliers

• Hve two or more simple machines put together and work though twoor more actions.

• Simple Machine

• Compound Machine

• Choose the correct new inventions:

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