Which things from the image make up the pond community? A.
water, rocks, clouds, and air only
B. fish, ducks, turtles, frogs, crayfish, and insects only
grasses, cattail reeds, fish, ducks, turtles, frogs, crayfish, and insects.
D.
grasses, cattail reeds, water, rocks, clouds, air, fish, ducks, turtles, frogs, crayfish, and insects.

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

How can parts of a solution be separated by chromatography?