1.- b. Change in color.
It's change in color because the other can happen by via a physical change.
2.- d. A metal is added to an acid and hydrogen gas is formed.
A chemical change results in change of an object chemical structure being disrupted or altered.
Answer:
Acorns
Explanation:
The first trophic level consists of producers or plants. The only plant on the list is acorns.
The answer to your question is C- colder , saltier , and denser why because they don't have the same density level and deep ocean water is more dense than surface. and also From
your feet to your knees the water feels icy cold and from your knees to your head the water feels
warm. You probably wondered what causes this to happen. What you felt were warm surface
currents and cold deep currents. Changes in the density set these currents in motion. some ocean currents are set in motion by the wind other ocean currents are created by something you can't feel or see. Differences in density of water can also cause currents to form and move. Density is affected by temperature and salinity. i hoped i helped