While walking home on a dark night, joanna saw a bright light in the sky and concluded that it must have been a spaceship from another planet. which of these questions could joanna answer using scientific methods of investigation? a) can aliens read our minds? b) does joanna actually believe in aliens? c) what is the aliens spacecraft made from? d) what percent of people in the area saw a bright light that night?

Which of the following is an example of a non-falsifiable hypothesis? a. there is a teacup orbiting the milky way galaxy. b. there is no life on mars. c. the human species started in africa. d. humans cannot live without the amino acid methionine

Does masterbation affect height growth or loss of growth hormone?

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.