Answer the following question given this paragraph: where is the number of moles of gas and is a constant. Avogadro's law is in evidence whenever you blow up a balloon. The volume of the balloon increases as you add moles of gas to the balloon by blowing it up. Q: What happens to the volume of a balloon when you add moles of gas to it by blowing up? Choices: - changes randomly - decreases - stays the same - increases A:
increases
(Question)
Answer the following question given this paragraph: Most of the world's largest mountains form as plates collide at convergent plate boundaries. Continents are too buoyant to get pushed down into the mantle. So when the plates smash together, the crust crumples upwards. This creates mountains. Folding and faulting in these collision zones makes the crust thicker. Q: Why are continents unable to be pushed down into the mantle by plate boundaries? Choices: - gravity - surface tension - density - buoyancy A:
(Answer)
buoyancy
Ques: Answer the following question given this paragraph: Nonrenewable resources are natural resources that can't be remade or else take too long to remake to keep up with human use. Examples of nonrenewable resources are coal, oil, and natural gas, all of which are fossil fuels. Fossil fuels form from the remains of plants and animals over hundreds of millions of years. We are using them up far faster than they can be replaced. At current rates of use, oil and natural gas will be used up in just a few decades, and coal will be used up in a couple of centuries. Q: What are resources that can not be remade, or would take too long to remake to keep up wiht human use called? Choices: - renewable resources - green resources - photoreactive resources - nonrewable resources A:
Ans: nonrewable resources
(Q).
Answer the following question given this paragraph: Serge Melki (Flickr:Serge Melki). The burning of charcoal is a combustion reaction . CC BY 2.0. Q: The burning of charcoal is what type of reaction? Choices: - condensation - physical - evaporation - combustion A:
(A).
combustion
Ques:Answer the following question given this paragraph: Helium may seem to be an exception, since it has only two valence electrons. This has to do with the fact that the n = 1 energy level has one s orbital and no p orbitals. As a result, the first energy level can be completely filled by just two electrons. It is the presence of a filled valence shell that gives noble gases their unusual stability, not anything intrinsic about the number 8. In addition to helium, the first few elements such as lithium, beryllium, and boron, have a particularly stable configuration with a pair of valence electrons rather that an octet. Q: How many valence electrons does helium have? Choices: - Five - six - three - two A:

Ans:two
Answer the following question given this paragraph: 22.11.4 Chryosophytes Chryosophytes are the most abundant unicellular algae in the oceans. They are also one of the biggest components of plankton, a free-floating collection of microorganisms, eggs, and larvae. As photosynthetic organisms, they produce a significant amount of atmospheric oxygen. The reproduction cycle of chryosophytes is particularly interesting. Note that diatoms reproduce both asexually and sexually. Since diatoms have a rigid cell wall with an outer layer of silica (found in sand and glass), the daughter cells produced by mitosis must fit inside the original cell wall. Therefore, each generation of diatoms is smaller than the one before. The reduction in size continues until the diatoms produce sexually, producing a zygote which eventually grows to the original size as it matures. Q: What are the most abundant unicellular algae in the oceans? Choices: - chlorella - sporozoans - staurikosaurus - chryosophytes A:
chryosophytes