Which of the following can lower the activation energy of a system?

A. density

B. catalysts

C. temperature

D. concentration

Which of the following best describes the main function of the nervous system? To deliver nutrients and other essential materials to cells and remove waste products To break down the nutrients found in food so that they can be used by all cells in

Given the balanced chemical equation, C4 H4 + 5 O2 → 4 CO2, + 2 H2O. If 0.3618 moles of C4H4 are allowed to react with 1.

2C6H10 + 17O2 = 12CO2 + 10H2O How many moles of oxygen are needed to produce 1.5 moles of carbon dioxide?

Sedimentary rocks may form far away from where the sediments formed. what two processes bring sediments to a new location

The greenhouse effect can be compared to ... A) a car with it's windows closed parked in the sun. B) a person lying on a sunny beach. C) steam coming off of a pot of boiling water. D) heat coming off a fire.

Predict what the population of the United States will be in the year 2010

Assume we could alter the conditions in the duodenum. Which of the following would be consistent with inserting a large volume of highly acidic chyme which contained a large amount of fat?

Molecules that form when electrons are shared unequally between atoms are called

Explain why substances do not crumble into piles of atoms.

Being able to identify good source of scientific information and apply the knowledge to problems in your life is a part of having A Scientific hypothesis B Scientific inquiry C Scientific literacy D Scientific laws