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JC Science
JC Science

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JC Science

What we can do to reduce our Carbon Footprint

  • Walk or cycle to school instead of driving this is because cars contribute 22% of CO2 emissions in Ireland
  • Use public transport instead of cars
  • Turn your heating down. Reducing your thermostat by 1C can cut your energy use and your home heating bill by 10%
  • Insulate your hot water tank, attic and walls to reduce heat loss
  • Choose energy-efficient appliances
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JC Science

Gases

Gases are identified as materials that

  • have no definite shape
  • have no definite volume
  • can be easily compressed
  • can flow

In a gas the particles move in all directions and the bounce off one another, causing the particles to spread out further and further.

If the gas is held in a container the particles will bounce off the walls of the container as well as each other.

Water vapour is an example of a gas. Water vapour usually is invisible.

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JC Science

Conservation of Mass

the total mass will remain the same even if there are physical or chemical changes closed system prevents anything already in the system from leaving and does not allow anything else to get into the system. For example, the Alka tablets in the glass of water in the form an open system by escaping into the air while The balloon and conical flask form a closed because the gas produced in the flask is trapped by the balloon and cannot leave the system.

Conservation of mass in a closed system the total mass will remain the same even if there... (More)

The Greenhouse Effect

- The greenhouse effect is the warming of the earth's surface and the air above it caused by gases in the air that trap energy from the sun. The heat-trapping gases are known as greenhouse gases.

During the day, the sun's solar energy penetrates the earths atmosphere. The earths surface then gets warme up. At ight the earths surface cools down, releasing the heat back into the air. Some of the heat,however, gets trapped by the greenhouse gases in the atmosphere. That is what keeps our earth at an average temperature of 15 degrees Celsius.

However, the greenhouse effect is... (More)