Q: What happens to a tectonic plate when it subducts? Read this paragraph and choose the correct option from the provided answers: Composite volcanoes are common along convergent plate boundaries. When a tectonic plate subducts, it melts. This creates the thick magma needed for these eruptions. The Pacific Ring of Fire is dotted by composite volcanoes. Choices: - it warms - it cracks - it sinks - it melts A:
it melts

(Question)
Q: What kind of reaction adds water to an organic molecule and breaks the large molecule into smaller molecules? Read this paragraph and choose the correct option from the provided answers: A hydration reaction is the opposite of a dehydration reaction. A hydration reaction adds water to an organic molecule and breaks the large molecule into smaller molecules. Hydration reactions occur in an acidic water solution. An example of hydration reaction is the breaking of peptide bonds in polypeptides. A hydroxide ion (OH - ) and a hydrogen ion (H + ) (both from a water molecule) bond to the carbon atoms that formed the peptide bond. This breaks the peptide bond and results in two amino acids. Choices: - heat reaction - supplementation reaction - aerobic reaction - hydration reaction A:
(Answer)
hydration reaction

Ques: Q: How many quarks are in each proton and neutron? Read this paragraph and choose the correct option from the provided answers: Remember the quarks from the first page of this chapter? Quarks are even tinier particles of matter that make up protons and neutrons. There are three quarks in each proton and three quarks in each neutron. The charges of quarks are balanced exactly right to give a positive charge to a proton and a neutral charge to a neutron. It might seem strange that quarks are never found alone but only as components of other particles. This is because the quarks are held together by very strange particles called gluons. Choices: - ten - five - four - three A:
Ans: three

(Q).
Q: What is the term for a formula that shows the elements in a compound in their lowest whole-number ratio? Read this paragraph and choose the correct option from the provided answers: An empirical formula is a formula that shows the elements in a compound in their lowest whole-number ratio. Glucose is an important simple sugar that cells use as their primary source of energy. Its molecular formula is C 6 H 12 O 6 . Since each of the subscripts is divisible by 6, the empirical formula for glucose is CH 2 O. When chemists analyze an unknown compound, often the first step is to determine its empirical formula. There are a great many compounds whose molecular and empirical formulas are the same. If the molecular formula cannot be simplified into a smaller whole-number ratio, as in the case of H 2 O or P 2 O 5 , then the empirical formula is also the molecular formula. Choices: - measured formula - intrinsic formula - Dwarf Formula - empirical formula A:
(A).
empirical formula

Ques:Q: What are formed when crystals precipitate out from a liquid? Read this paragraph and choose the correct option from the provided answers: Chemical sedimentary rocks form when crystals precipitate out from a liquid. The mineral halite, also called rock salt, forms this way. You can make halite! Leave a shallow dish of salt water out in the Sun. As the water evaporates, salt crystals form in the dish. There are other chemical sedimentary rocks, like gypsum ( Figure below ). Choices: - diamonds - additive sedimentary rocks - gaseous sedimentary rocks - chemical sedimentary rocks A:

Ans:chemical sedimentary rocks

Ques:Q: Where do most ecosystems get their energy from? Read this paragraph and choose the correct option from the provided answers: Most ecosystems get their energy from the Sun. Only producers can use sunlight to make usable energy. Producers convert the sunlight into chemical energy or food. Consumers get some of that energy when they eat producers. They also pass some of the energy on to other consumers when they are eaten. In this way, energy flows from one living thing to another. Choices: - earth - heat - water - sun A:

Ans:
sun