g5 earth annd atmosphere 2

formation of fossil fuel,coal.

trees grow, die, rocks pile on decomposing trees and animals, heat and pressure exert on material for millions of years.

sedimentary rock

weathered and eroded material is transported, deposited in layers, transformed to solid rock through.

metamorphic rocks

formed when igneous and sedimentary rocks experience deep heat and pressure, causing them to change

erosion

the process that removes material where rock has been weathered

weathering

the breakdown of rocks in place through physical, chemical or biological changes

difference between weathering and erosion

Weathering is the breakdown of rocks in place, while erosion is the movement of those broken materials to new locations

2 main chemicals in the atmosphere today

nitrogen(80%) and oxygen (20%)

main gases present in early atmosphere

carbon dioxide, nitrogen, water vapour, ammonia, methane. all this came from volcanoes

how does our atmosphere sustain life

radiation from sun enters atmosphere, some escapes into space, some reflected back through greenhouse gases

carbon cycle

continuous movement of carbon among the atmosphere, oceans, land, and living organisms

combustion

the process of burning

incomplete combustion

when a fuel burns with insufficient oxygen, making carbon monoxide, soot

reduce

use less of a substance

reuse

use substance over and over without changing it

recycle and advantage

turning old/waste products into something new. advantage is it requires less energy than extracting new material