Answer the following question given this paragraph: Metamorphic rocks form when an existing rock is changed by heat or pressure. The minerals in the rock change but do not melt. The rock experiences these changes within the Earth. Q: Metamorphic rocks form when an existing rock is changed by heat or what? Choices: - radiation - chemical reaction - cold - pressure A:
pressure
(Question)
Answer the following question given this paragraph: The number of reactant molecules in an elementary step is referred to as its molecularity. The vast majority of elementary steps are unimolecular or bimolecular. Q: What property is associated with the number of reactant molecules involved in an elementary step? Choices: - kilocalorie - pollenation - Molecules - molecularity A:
(Answer)
molecularity
Ques: Answer the following question given this paragraph: the history of galactic evolution has been, and the nature of space in their vicinity. However, so many black holes are now known that correlations between black hole mass and galactic nuclei characteristics are being studied. What is the mechanism for the energy output of quasars? These distant and extraordinarily energetic objects now seem to be early stages of galactic evolution with a supermassive black-hole-devouring material. Connections are now being made with galaxies having energetic cores, and there is evidence consistent with less consuming, supermassive black holes at the center of older galaxies. New instruments are allowing us to see deeper into our own galaxy for evidence of our own massive black hole. Q: What distant and extraordinarily energetic objects now seem to be early stages of galactic evolution with a supermassive black-hole-devouring material? Choices: - pulsars - stars - neutrinos - quasars A:
Ans: quasars
(Q).
Answer the following question given this paragraph: The noble gases are characterized by their high ionization energies and low electron affinities. Q: Electromagnetic specturm is the full spectrum of raidant energy, which is energy emitted and transmitted as what? Choices: - currents - flows - tides - waves A:
(A).
waves
Ques:Answer the following question given this paragraph: Q: What specific part of the african violet is used to propagate other plants? Choices: - petals - spores - roots - leaves A:

Ans:leaves
Answer the following question given this paragraph: Q: Why have rivers in arid regions been reduced to trickles? Choices: - global warming - rainforest destruction - emigration - diversion of water A:
diversion of water