The North Pole is dark 24 hours a day in: a. the summer b. August c. the winter

Which best describes the scientific process

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

Plz plz plz quick! 49 points for whoever which of the following statements about greenhouse effect is true? *life on earth is suffering because of greenhouse effect *the greenhouse effect is caused by human activity *all greenhouse gases are harmful *life on earth would not exist without the greenhouse effect