PLZ HELP

What are the biotic and abiotic components in an ecosystem that contains the sun, kelp, sea otters, basalt rock, clams, water, plankton, ice, orca whales, bacteria, air, and sand?

List which components are biotic and which are abiotic

Using the periodic table, determine which material is most likely a good conductor

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?

Suppose you use three different scale to weigh a bag of organges. one scale says the nag weighs 2.1 lb, and third says it weighs 2.1 lb. the actual weight of the bag of organges is 2.153 lb. which of the following best decribes these results?