Answer the following question given this paragraph: Rutherford's atomic model became known as the nuclear model . In the nuclear atom, the protons and neutrons, which comprise nearly all of the mass of the atom, are located in the nucleus at the center of the atom. The electrons are distributed around the nucleus and occupy most of the volume of the atom. It is worth emphasizing just how small the nucleus is compared to the rest of the atom. If we could blow up an atom to be the size of a large professional football stadium, the nucleus would be about the size of a marble. Q: In an atom, what two major types of particles are located in the nucleus? Choices: - electrons and neutrons - molecules and neutrons - ions and electrons - protons and neutrons A:
protons and neutrons
(Question)
Answer the following question given this paragraph: A catalyst works by providing a lower energy pathway from reactants to products. The use of a catalyst involves intermediate reactions which have lower activation complexes than the original reaction. On a simplified reaction energy diagram, this can be thought of as lowering the activation energy for a given transformation. If the activation energy of a reaction is decreased, more collisions will have enough energy to overcome this lower barrier, so the reactant-to-product transformation will occur more frequently. As a result, the overall reaction rate will be higher than for an identical reaction with a larger activation energy barrier. Q: What works by providing a lower energy pathway from reactants to products? Choices: - thermodynamics - hormones - magnetism - catalyst A:
(Answer)
catalyst
Ques: Answer the following question given this paragraph: A person is able to lift the entire rear end of the automobile using only one hand with the hydraulic jack shown in the image. Hydraulic systems are similar to simple machines in that they can produce very large mechanical advantages. Q: A hydraulic jack that makes it possible to lift a car easily is an example of what, meaning it produces mechanical advantages? Choices: - quantum physics - simple weapon - complex machines - simple machine A:
Ans: simple machine
(Q).
Answer the following question given this paragraph: Molecular and Formula Masses The molecular mass of a substance is the sum of the average masses of the atoms in one molecule of a substance. It is calculated by adding together the atomic masses of the elements in the substance, each multiplied by its subscript (written or implied) in the molecular formula. Because the units of atomic mass are atomic mass units, the units of molecular mass are also atomic mass units. The procedure for calculating molecular masses is illustrated in Example 1. Q: What is calculated by adding together the atomic masses of the elements in the substance, each multiplied by its subscript (written or implied) in the molecular formula? Choices: - mass effect - fractional mass - magnetic mass - molecular mass A:
(A).
molecular mass
Ques:Answer the following question given this paragraph: Q: Many deleterious alleles have such severe effects that a homozygous embryo spontaneously aborts long before what? Choices: - baby - couple - LIfe - birth A:

Ans:birth
Question: Answer the following question given this paragraph: Galaxies can be spiral, elliptical, or irregular. Q: Galaxies can be spiral, elliptical, or which other type? Choices: - oblong - simple - vertical - irregular A:
Answer:
irregular