Why is most of the mass of the atom in the nucleus?

a. protons are located in the nucleus of the atom, and they are responsible for the mass of the atom.

b. protons and electrons are located in the nucleus of the atom, and they are responsible for the mass of the atom.

c. neutrons are located in the nucleus of the atom, and they are responsible for the mass of the atom.

d. protons and neutrons are located in the nucleus of the atom, and they are responsible for the mass of the atom.

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

Why do we perceive objects as retaining their brightness under different lighting levels?

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.