Answer the following question given this paragraph: Different seafloor magnetic stripes equal different ages. By using geologic dating techniques, scientists could figure out what these ages are. They found that the youngest rocks on the seafloor were at the mid-ocean ridges. The rocks get older with distance from the ridge crest. Scientists were surprised to find that the oldest seafloor is less than 180 million years old. This may seem old, but the oldest continental crust is around 4 billion years old. Q: Geologists found that the youngest rocks on the seafloor were where? Choices: - early - ocean ridges - late - ocean ridges - seabed floor - mid - ocean ridges A:
mid - ocean ridges
Answer the following question given this paragraph: A piston having a certain pressure and volume (left piston) will have half the volume when its pressure is twice as much (right piston). One can also plot P versus V for a given amount of gas at a certain temperature; such a plot will look like the graph on the right. Boyle's law is an example of a second type of mathematical problem we see in chemistryone based on a mathematical formula. Tactics for working with mathematical formulas are different from tactics for working with conversion factors. First, most of the questions you will have to answer using formulas are word-type questions, so the first step is to identify what quantities are known and assign them to variables. Second, in most formulas, some mathematical rearrangements (i. , algebra) must be performed to solve for an unknown variable. The rule is that to find the value of the unknown variable, you must mathematically isolate the unknown variable by itself and in the numerator of one side of the equation. Finally, units must be consistent. For example, in Boyle's law there are two pressure variables; they must have the same unit. There are also two volume variables; they also must have the same unit. In most cases, it won't matter what the unit is, but the unit must be the same on both sides of the equation. Q: Boyle's law applies to matter which is in what state? Choices: - liquids - plasma - solids - gas A:
gas
Q: Answer the following question given this paragraph: Covalent bonds result from the overlap of atomic orbitals. Q: What bonds result from the overlap of atomic orbitals? Choices: - valent - hydrogen - metallic - covalents A:
A: covalents
Question: Answer the following question given this paragraph: NaNO 3(s) + H 2 SO 4(l) NaHSO 4(s) + HNO 3(g) The Ostwald process is the commercial method for producing nitric acid. This process involves the oxidation of ammonia to nitric oxide, NO; oxidation of nitric oxide to nitrogen dioxide, NO2; and further oxidation and hydration of nitrogen dioxide to form nitric acid: 4NH 3(g) + 5O 2(g) 4NO(g) + 6H 2 O(g) 2NO(g) + O 2(g) 2NO 2(g) 3NO 2(g) + H 2 O(l) 2HNO 3(aq) + NO(g) Or 4NO 2(g) + O 2(g) + 2H 2 O(g) 4HNO 3(l) Pure nitric acid is a colorless liquid. However, it is often yellow or brown in color because NO2 forms as the acid decomposes. Nitric acid is stable in aqueous solution; solutions containing 68% of the acid are commercially available concentrated nitric acid. It is both a strong oxidizing agent and a strong acid. The action of nitric acid on a metal rarely produces H2 (by reduction of H+) in more than small amounts. Instead, the reduction of nitrogen occurs. The products formed depend on the concentration of the acid, the activity of the metal, and the temperature. Normally, a mixture of nitrates, nitrogen oxides, and various reduction products form. Less active metals such as copper, silver, and lead reduce concentrated nitric acid primarily to nitrogen dioxide. The reaction of dilute nitric acid with copper produces NO. In each case, the nitrate salts of the metals crystallize upon evaporation of the resultant solutions. Nonmetallic elements, such as sulfur, carbon, iodine, and phosphorus, undergo oxidation by concentrated nitric acid to their oxides or oxyacids, with the formation of NO2: S(s) + 6HNO 3(aq) H 2 SO 4(aq) + 6NO 2(g) + 2H 2 O(l) C(s) + 4HNO 3(aq) CO 2(g) + 4NO 2(g) + 2H 2 O(l) Nitric acid oxidizes many compounds; for example, concentrated nitric acid readily oxidizes hydrochloric acid to chlorine and chlorine dioxide. A mixture of one part concentrated nitric acid and three parts concentrated hydrochloric acid (called aqua regia, which means royal water) reacts vigorously with metals. This mixture is particularly useful in... Q: The ostwald process is the commercial method for producing what? Choices: - citric acid - deoxyribonucleic acid - chlorine - nitric acid A:
Answer: nitric acid
*Question*
Answer the following question given this paragraph: Compare fractures and faults and define how they are related to earthquakes. Q: Fractures and faults are terms you hear when talking about? Choices: - volcanoes - storms - magnets - earthquakes A:
**Answer**
earthquakes
*Question*
Answer the following question given this paragraph: Plants and fungi cells both have a cell wall, which animals do not have. Q: Plants and fungi cells have what basic cell structure, which animals do not have? Choices: - Cytoskeleton - Lysosomes - Cell Membrane - cell wall A:
**Answer**
cell wall