Year 9 Science Revision

Has a mass of 0 and a charge of 0

• Alpha
• Beta
• Gamma

Has a moderate penetrating power.  It can penetrate 4 mm into body tissue and can be stopped by metal foil.

• Alpha
• Beta
• Gamma

Has a mass of 4 and a charge of +2

• Alpha
• Beta
• Gamma

Has the lowest penetrating power.  Can only penetrate 0.05 mm into the body and can be stopped by a piece of paper or clothing.

• Alpha
• Beta
• Gamma

Has the highest penetrating power. Can penetrate our body. Even several cm thick of lead or concrete cannot stop all of it.

• Alpha

• Beta

• Gamma

An alpha particle consists of:

• an electron

• a proton and an electron

• 2 protons and 2 neutrons

• a photon

The law of conservation of energy states that when one form of energy is converted into another,

• energy is destroyed in the process
• no energy is destroyed in the process
• energy is created in the process
• some amount of energy cannot be accounted for

Electrical Energy is transferred to _____ Energy.

• Thermal
• Solar
• Electrical
• None

Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?

• Chemical to light
• Electrical to chemical
• Electrical to light
• Chemical to electrical

The Law of Conservation of Energy states:

• Energy can created or destroyed but not transformed

• Energy cannot be created or destroyed, it can only transformed

• Energy can't be created, destroyed or transformed

• Energy cannot be created or destroyed.