It is everyones duty to do someting good to the environment around us.As middle school students, we can also do a lot of helpful things.For example, we can protect it by not throwing rubbish away.We can save water to make full use of it. We can use materials which do no harm to t...
Moreandmorerockpiledontopofmorerock,anditweighedmoreandmore.Itbegantopressdownonthepeat.Thepeatwassqueezedandsqueezeduntilthewatercameoutofitanditeventually,overmillionsofyears,itturnedintocoal,oilorpetroleum,andnaturalgas.Coal Coal •Theworld’smostabundantfossilfuel –Created300–400millionyearsago •...
It is reported that we will have no coal or oil in 100 years. So if we go on wasting resources, we will use nothing in the future. We should say no to the people who waste things. Everybody should stop wasting things. In our life, we can do many things to prevent waste. For ...
Why do plants/trees take in carbon dioxide and humans take in oxygen? Why is carbon dioxide considered a greenhouse gas? How do you get rid of carbon dioxide in your body? How is energy transformed during the carbon cycle? How do the plants in a rainforest contribute to the water cycle...
What is a direct effect on humans that increases with the depletion of atmospheric ozone? How does the shape of a molecule affect a person's health? What are two sources of oil pollution, and how do these sources directly impact the environment?
And of course, all of that energy would be put to use for other purposes, such as supercomputing (on a never-before seen scale), faster space travel technologies and innumerable other ideas we haven't even conceived. We wouldn't need to do all of this with painstaking labor. Robots ...
several humans (nicknamed "muckers" and "sandhogs") would stand inside compartments within the "can" and remove the clay or sand as the shield advanced. Hydraulic jacks would gradually move the shield forward, while crews behind it installed metal supporting rings, then lined them with concrete...
How do you make electricity from coal: A great 10-minute animation from FirstEnergy and EDP Video explains the various stages in energy production and has lots of interesting facts and statistics. There's a good explanation of how cooling towers work and why power plants now use smokestack ...
How do changes in the cryosphere affect the biosphere? How does limestone affect geomorphology? How have humans altered the atmosphere, biosphere, hydrosphere, and lithosphere? How does severe weather in Earth?s atmosphere affect Earth?s geosphere?
How do gas laws apply to construction? How does climate change affect wind? Why do humans not use their skin for gas exchange? How does oxygen toxicity connect with the gas laws? How are fuels such as coal and petroleum formed? What are some conditions that can affect the diffusion of pu...