*Question*
Q: The ability of matter to combine chemically with other substances is known as? Read this paragraph and choose the correct option from the provided answers: Reactivity is the ability of matter to combine chemically with other substances. Some kinds of matter are extremely reactive; others are extremely unreactive. For example, potassium is very reactive, even with water. When a pea-sized piece of potassium is added to a small amount of water, it reacts explosively. You can observe this reaction in the video at the URL below. ( Caution: Don't try this at home!) In contrast, noble gases such as helium almost never react with any other substances. Choices: - turbidity - solubility - permeability - reactivity A:
**Answer**
reactivity

*Question*
Q: Combining the voltages of the oxidation and reduction half reactions helps to determine what? Read this paragraph and choose the correct option from the provided answers: To determine the overall voltage of a particular voltaic cell, simply combine the voltages of the oxidation and reduction half reactions. Even if you need to take a multiple of a half reaction for the electrons to cancel, do not take the multiple of the E1/2. Use the values directly as is from - ball-ch14_s03_t01. Spontaneous redox reactions have positive overall voltages. If the voltage of the reaction as written is negative, it is not spontaneous in that direction. Rather, the reverse reaction is the spontaneous redox reaction. Choices: - slimy - moisture - magnetic - voltage A:
**Answer**
voltage

*Question*
Q: What do we call the seasonal movement of animals? Read this paragraph and choose the correct option from the provided answers: Monarch butterflies gather in large groups as they migrate 2,500 miles south each fall. They return to the north in the spring. This migration is a cycle that repeats every year. Choices: - population - trade - immigration - migration A:
**Answer**
migration

*Question*
Q: Osteoporosis, osteoarthritis, fractures, and sprains are problems affecting what system? Read this paragraph and choose the correct option from the provided answers: Possible problems of the skeletal system include osteoporosis, osteoarthritis, fractures, and sprains. Choices: - digestive system - nervous system - tissues system - skeletal system A:
**Answer**
skeletal system