Andrew is doing an investigation to find out if the weight of a box will have an effect on the amount of force needed to move it. He fills four identical boxes with different amounts of stones. Box A has a mass of 0.6 kilograms. Box B has a mass of 1.5 kilograms. Box C has a mass
of 2.0 kilograms. Box D has a mass of 0.2 grams. Which box will require the greatest amount of force in order to be moved across a table?
A box A
O B. box
O c. box D
O D. box B

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. chytridiomycosis is a fungal disease first identified in 1998 as a cause of massive amphibian deaths. in some severely impacted populations, a few individuals have survived, perhaps because of some natural resistance. if these resistant individuals continue to survive and prosper, new resistant populations might emerge. this would be an example of the founder effect artificial selection genetic drift natural selection sexual selection

When a human or animal consumes food, the carbon in that food is most likely to be converted into which of the following elements? a. carbon remains carbon b. nitrogen c. oxygen d. hydrogen