Sources of Greenhouse Gases from Human Activity
Carbon Dioxide - Burning fossil fuels. - Respiration. - Decay and burning of wood. - Cement production.Methane - Coal mining. - Landfill sites. - Natural gas leaks. - Rice paddies. - Waste...
Jc Science Notes
Notes tagged with "jc science".
Climate Change
- Climate is patterns of weather conditions in a large area over a long period time. - The sun sends out heat and light energy. - Some travels through the atmosphere where it is absorbed by ...
The Ozone Layer
The Ozone layer is made mainly of nitrogen and oxygen. It protects Earth from the suns harmful radiation and keeps the planet warm enough for life to exist. The ozone layer is a part of the...
Solar and Lunar Eclipses
Solar Eclipses - Occasionally the moon is positioned directly between the Earth and the sun. - When this happens, the shadow of the moon falls on Earth. - People who are in the shadow will ...
Cycles on Earth
Transpiration: The evaporation of water from the surface of a leaf Condensation: When a substance changes from gas to liquid. Precipitation: Rain, snow or sleet, etc formed when water in t...
Temperature and Solubility
We know that all matter is made from atoms and molecules. when a solid (the solute) dissolves ina liquid (the solvent), the atoms and molecules of the solute are able to fit into the gaps ar...
Distillation
Distillation is a method used to separate and collect the liquid part of a solution. Evaporation causes liquids to turn into gas and escape. Whit distillation, a piece of equipment called Li...
Mixtures
Soluble substances: are able to dissolve in a liquid An insoluble substance: does not dissolve in a liquid Solute: a substance that dissolves in a liquid Solvent: The liquid in which a su...
Filtiration
To filter a mixture we use filter paper. Filter paper has tiny holes in it that only let some materials pass through. The materials that cannot pass through are trapped on the filter paper. ...
Evaporation
Evaporation is used to separate a soluble solid, like salt, from a solvent. The solution is heated up until the liquid particles get enough energy to form a gas. The gas particles spread on ...