Please help quick due soon! The material in the outer core is a fluid. A fluid is any material that can flow, such as a liquid or gas. Within a fluid, differences in density can cause motion. The parts of the fluid that are denser sink to the bottom. The parts of the fluid that are less dense float to the top. Thus, differences in density cause convection in water being heated on a stove,

6. in the dna double helix, how are the two strands of dna held together? a. chemical bonds between base pairs hold the two strands of dna together. b. hydrogen bonds between the base pairs hold the two strands of dna together. c. hydrogen bonds between sugar groups and phosphate groups hold the two strands of dna together. d. chemical bonds between sugar groups and phosphate groups hold the two strands of dna together.

Microorganisms aren’t all decomposers; in fact, many act as producers or primary consumers in an ecosystem. how do microorganisms that act as producers benefit the rest of an ecosystem in terms of energy transfer? what about microorganisms that act as primary consumers?

Compare the composition of the moon's surface with the composition of the earth's surface.