The matter surrounding a comet’s core is vaporized and forms a very bright halo of , and an enormous cloud of envelopes the head of the comet.

What are some characteristics of a free enterprise economy?

Why are fossils not found in igneous rocks? igneous rocks are made from cooling of lava or magma. igneous rocks are found too deep underground. igneous rocks are too dark in color to contain fossils. igneous rocks are too dense to contain fossils.

The green colored pigment in chloroplasts is? a. nitrogen b. chlorophyll c. chlorophorm d. chlorofloromethane