11. label each of the following as either a physical process or a chemical process.
a. corrosion of aluminum metal.
b. melting of ice.
c. pulverizing an aspirin.
d. digesting a candy bar.
e. explosion of nitroglycerin.
f. milk turning sour.
g. burning of paper.
h. forming of frost on a cold night.
i. bleaching of hair with hydrogen peroxide.
j. a copper wire is hammered flat.

Which of the following birds remained ancient looking in the miocene epoch? a. crows b. owls c. grouses d. none of the above

Study the diagram of a desert food chain . what would most likely happen if the kangaroo rats were killed off and removed from the food chain ?

Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. magnesium is an important component of chlorophyll. the concentration of magnesium ions is higher in the root-hair cells of plants than in the soil. which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll? osmosis diffusion passive transport active transport