Crawford's teacher tells him that all objects exert gravitational forces on one another and these forces depend on the distance between the two objects. Crawford wants to know why, if this is true, he cannot slide the books on his desk toward himself without reaching out and touching them, but the Earth can move objects without making contact in this way. Which statement offers the best explanation for Crawford's question?

Turtle hatchling survivorship rate is low in many turtle species due to predation. amanda researched the predatory rate on a species of turtle eggs in the red river. the eggs were harvested from trapped turtles and the egg's cloaca film (reproductive discharge) was either washed off or left on once gathered. research suggests that predators use the female's cloaca scent to locate the eggs. the eggs were only handled when wearing gloves and then reburied along islands where the turtles were trapped. the nests were monitored by cameras and manually on foot and data on nest predation were recorded. a. based on the experimental design, what is the dependent variable? b. based on the experimental design, what is the independent variable? c. based on the experimental design, what is the control?

What is the name for a substance formed in a chemical reaction

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this