Maria and Jane set up a lemonade stand one summer to earn money for a trip to the beach. They noticed that the hotter the day the more glasses of lemonade they soldThey mixed up the lemonade exactly the same way every day the same amount of sugar, lemon juiceand water. They added ice to the glass when they poured the drink. They always used the same size glass They decided to chart their sales in order to figure out how much lemonade to make each day , using the weather forecast as their guide . Identify the independent, dependent, and controlled variables in the girls experimental data.

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

hope this

prndulum needs thread, weight clock to time swings

helium

oxygen

neon

sodium