weather - the short term changes in the atmosphere, climate - the weather of a specific region averaged over a long period of time, greenhouse effect - the way in which heat is trapped close to Earth's surface by “greenhouse gases.”, greenhouse gases - gases in the atmosphere that raise the surface temperature of planets such as the Earth, condense - change from a gas or vapor to a liquid, precipitation - water released from clouds in the form of rain, freezing rain, sleet, snow, or hail, evaporation - the process that changes liquid water to gaseous water (water vapor), thermal energy - the TOTAL kinetic energy of a substance; measured by temperature, density - how close, or compacted the particles are to each other; determines whether objects sink or float in fluids (liquids and gases), convection - the transfer of thermal energy through the movement of particles from one location to another, atmosphere - refers to all the air surrounding the Earth, hydrosphere - refers to all the solid, liquid, and gas forms of water, weather front - a transition zone between two different air masses at the Earth's surface, jet streams - currents of air high above Earth, low pressure - causes moist air to rise and cool; forms clouds and is related to rainy and windy weather, high pressure - causes dry cold air to push down and warm up; forms sunny days,

8th gr Weather and Climate

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