people
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You can observe the formation of a precipitate (solid) from two clear solutions or a color change in the reaction mixture. Another indication is the release or absorption of heat or light during the reaction.
Two ways to reduce carbon dioxide emissions and combat climate change are transitioning to renewable energy sources such as solar and wind power, and implementing policies to increase energy efficiency in buildings and transportation.
gold and silver
Two ways to tell that a rock has been weathered are a change in color or texture, and the presence of fractures or cracks due to expansion and contraction caused by weathering processes. Additionally, the flaking or crumbling of the rock's surface may indicate weathering.
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what two ways does the suns position change in the sky
The two party system offer a choice between Change and Established Ways
They can be pollinated artificialy or naturally (by bees or birds)
When you mine, you can be destroying homes of animals, and disrupting natural habitats.
There are not two but three ways to change. Inline, Internal and External CSS are three ways of changing CSS.
Global warmingnew roads and citiesdeforestationglaciers melting
Two ways that you can change the sound of an instrument are tuning or adjustment of the valves. Another way to change the sound of an instrument is to change your technique of blowing or bowing technique. I am sure there are more ways but here are some ideas!
speed and direction
Two common examples are photosynthesis and cellular respiration.
Two ways that the expansion of urban areas might be harmful to nearby ecosystems is that is could destroy animal's natural habitats and it could also pollute the environment.
changes in speed or direction or both