Earth and Atmosphere Crossword Puzzle

QUESTIONS LIST:

• carbon : _ sink, areas of vegetation, the ocean or the soil which absorb or store carbon.
• erosion: movement of rock by water, ice or wind.
• strata: layers of sedimentary rock.
• natural: _ resources materials form the earth which act as raw materials for making a variety of products.
• greenhouse: _ effect energy from the sun is transferred to the thermal energy store of gases in the earth's atmosphere).
• minerals: chemicals that rocks are made from.
• recycling: processing a material so that it can be used again.
• rock cycle: sequence of processes where rocks change from one type to another.
• fossil: _ fuels, fuels made from the remains of dead organisms formed over millions of years.
• weathering: the wearing down of rock by physical, chemical or biological processes.