A student decided to make a model of an ecosystem in a plastic bottle like the one shown. which of the following is a scientific question the student might ask? A. Is it ethical to keep invertebrates in a plastic bottle?
B. How does sunlight affect a model of a biogeochemical cycle?
C. How beautiful are the plants in my model?
D. Why do people recycle plastic bottles?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.