Answer the following question given this paragraph: Crossing charges. One method for obtaining subscripts in the empirical formula is by crossing charges. When crossing charges, you will sometimes find it necessary to reduce the subscripts to their simplest ratio to write the empirical formula. Consider, for example, the compound formed by Mg2+ and O2. Using the absolute values of the charges on the ions as subscripts gives the formula Mg2O2:. Q: Crossing charges is one method for obtaining what? Choices: - notations - superscripts - hybrids - subscripts A:
subscripts
Answer the following question given this paragraph: The process in which rocks or other solids change to liquids is called melting. Melting occurs when particles of a solid absorb enough energy to partly overcome the force of attraction holding them together. This allows them to move out of their fixed positions and slip over one another. Melting, like other changes of state, is a physical change in matter, so it doesn't change the chemical makeup or chemical properties of matter. Q: At what temperature does solid water melt to a liquid? Choices: - below 32 degrees c - below 0 degrees c - above 32 degrees c - at temperatures above 0 degrees c A:
at temperatures above 0 degrees c
Q: Answer the following question given this paragraph: We have been able to take pictures of only a few exoplanets. Most are discovered because of some tell-tale signs. One sign is a very slight motion of a star that must be caused by the pull of a planet. Another sign is the partial dimming of a star's light as the planet passes in front of it. Q: What celestial body is often discovered because it causes a star to move or to dim? Choices: - satellite - asteroid - comet - exoplanet A:
A: exoplanet
Question: Answer the following question given this paragraph: The thyroid gland is a relatively large gland in the neck. Hormones secreted by the thyroid gland include thyroxin. Thyroxin increases the rate of metabolism in cells throughout the body. Q: What is the name of the relatively large gland in the neck that secretes thyroxin? Choices: - Pancreas - Thyroid - Pituitary - thyroid A:
Answer: thyroid
*Question*
Answer the following question given this paragraph: During a thunderstorm, some parts of a thunderhead become negatively charged. Other parts become positively charged. The difference in charge creates lightning. Lightning is a huge release of electricity. Lightning can jump between oppositely charged parts of the same cloud, between one cloud and another, or between a cloud and the ground. You can see lightning in Figure below . Lightning blasts the air with energy. The air heats and expands so quickly that it explodes. This creates the loud sound of thunder . Q: What causes lightning during a thunderstorm? Choices: - difference in wind - difference in elevation - difference in temperature - difference in charge A:
**Answer**
difference in charge
(Question)
Answer the following question given this paragraph: If the temperature of a gas sample is decreased, the volume decreases as well. Q: If the temperature of a gas sample is decreased, what happens to the volume? Choices: - increases - stays the same - expands - decreases A:
(Answer)
decreases