input: OPTIONS:
- momentum
- magnetism
- volcanoes
- pressure Now, answer this question: Answer the following question given this paragraph: The amount of stress on a rock may be greater than the rock's strength. In that case, the rock will undergo strain or deformation ( Figure below ). Deep within the Earth, the pressure is very great. A rock behaves like a stretched rubber band. When the stress stops, the rock goes back to its original shape. If more stress is applied to the rock, it bends and flows. It does not return to its original shape. Near the surface, if the stress continues, the rock will fracture (rupture) and break. Q: Deep within the earth what force is so great that a rock behaves like a stretched rubber band? A:
A:
output: pressure

Answer the following question given this paragraph: Technically, any redox reaction can be set up to make a voltaic cell. In modern society, however, only certain redox reactions are put to practical use. A portable voltaic cell that generates electricity to power devices for our convenience is called a battery. All batteries are based on redox reactions. The first battery (called a "voltaic pile") was constructed by the Italian scientist Alessandro Volta in 1800 and was based on the copper/zinc reaction depicted in - ball-ch14_s03_f01. Unfortunately, it was messy, requiring quantities of copper and zinc salts dissolved in water. In 1866, the French scientist Georges Leclanche invented the dry cell, a precursor to today's modern battery. A schematic of a dry cell is shown in - ball-ch14_s03_f02. The zinc case and the central carbon rod serve as the anode and cathode, respectively. The other reactants are combined into a moist paste that minimizes free liquid, so the battery is less messy (hence the name dry cell). The actual redox reaction is complex but can be represented by the following redox reaction: + 2+ Zn + 2MnO2 + 2NH4 Zn + Mn2O3 + 2NH3 + H2O A dry cell has a voltage of about 1.56 V. While common and useful, dry cells have relatively short lifetimes and contain acidic components. They also cannot be recharged, so they are one-use only. Batteries that can be used only once are calledprimary batteries. Figure 14.2 Dry Cells. Q: Technically, any redox reaction can be set up to make a what? A:

OPTIONS:
- Black Cell
- blocky cell
- skaht cell
- voltaic cell

Answer: voltaic cell

Problem: OPTIONS:
- geological
- molecular
- environmental
- mechanical
Q: Answer the following question given this paragraph: Ice wedging and abrasion are two important processes of mechanical weathering. Q: Abrasion is a process of what type of weathering? A:
Answer: mechanical

Problem:OPTIONS:
- information
- manipulation
- suspension
- investigation

Answer the following question given this paragraph: Investigation is at the heart of science. It is how scientists do research. Scientific investigations produce evidence that helps answer questions and solve problems. If the evidence cannot provide answers or solutions, it may still be useful. It may lead to new questions or problems for investigation. As more knowledge is discovered, science advances. Q: In science, what process produces evidence that helps answer questions and solve problems? A:
****
A: investigation

Answer the following question given this paragraph: Great volcanic explosions and glowing red rivers of lava are fascinating. All igneous rock comes from magma or lava. Remember that magma is molten rock that is below Earth's surface. Lava is molten rock at Earth's surface. Q: Where does all igneous rock come from? A:
OPTIONS:
- the moon
- stratosphere
- oceans
- magma or lava
magma or lava

Answer the following question given this paragraph: ; The efficiency equals the output power divided by the input power. Q: What equals the output power divided by the input power? A:
OPTIONS:
- output
- potential
- inertia
- efficiency

Answer:
efficiency