Ducklings will sometimes treat a person as their mother.Dinosaurs are most closely related to modern day.Computer storage density is a measure of the quantity of information.Benjamin Franklin's famous kite and key experiment led to important advances in understanding _? Electricity.Batteries store what type of energy? Chemical energy.Au is the chemical symbol for which element? Gold.As well as certain nutrients and oxygen, what other three things do plants need to grow? Carbon dioxide, water and light.Approximately how many people live on the Earth? 7 billion.An object that does not let light pass through it is called.An engineer who works to improve the natural environment is called. What are these poles called? North and south
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