Choose the correct word from the drop-down menu to complete each sentence.
vis dark, highly decomposed organic matter found in soil.
vis a mixture of materials that holds moisture and drains well.
y contains coarse grains and allows water to drain quickly.
contains medium grains and retains water.
contains fine grains and has little space for water.

Light waves can move through , but they travel fastest when they move through a(n) .

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride

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