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)
Q: What works by providing a lower energy pathway from reactants to products? Choices: - thermodynamics - hormones - magnetism - catalyst A:
(Answer)
catalyst

Ques: 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).
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: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: Q: Galaxies can be spiral, elliptical, or which other type? Choices: - oblong - simple - vertical - irregular A:
Answer:
irregular