The diagram shows some organisms in an Antarctic food chain.
Sun-Algae
→ Krill
Cod
Seal -
Whale
Which BEST describes the role of krill in this food chain?
producers
decomposers
primary consumers
secondary consumers

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.

Determine the ph of 0.10 m nh3 solution. nh3 is a weak base with a kb equal to 1.8 x 10-5 round answer to nearest whole number.

How is electrolysis most commonly used to produce an energy source? a - splitting water molecules produces oxygen, which organisms breathe to fuel their bodies. b - splitting water molecules produces hydrogen gas, which is used to power machines through hydrogen fuel cells. c - splitting carbon dioxide molecules produces coal, a form of carbon that can be burned to produce heat. d - splitting carbon dioxide molecules produces natural gas, which can be burned to generate electricity in power plants.