Answer the following question given this paragraph: In alcoholic fermentation , pyruvic acid changes to alcohol and carbon dioxide. This is shown in Figure below . NAD + also forms from NADH, allowing glycolysis to continue making ATP. This type of fermentation is carried out by yeasts and some bacteria. It is used to make bread, wine, and biofuels. Q: In alcoholic fermentation , which acid changes to alcohol and carbon dioxide? Choices: - rain - chloride - lipoic - pyruvic A:
pyruvic
Answer the following question given this paragraph: A magnet is an object that attracts certain materials such as iron. You're probably familiar with common bar magnets, like the one shown in the Figure below . Like all magnets, this bar magnet has north and south magnetic poles . The red end of the magnet is the north pole and the blue end is the south pole. The poles are regions where the magnet is strongest. The poles are called north and south because they always line up with Earth's north-south axis if the magnet is allowed to move freely. (Earth's axis is the imaginary line around which the planet rotates. ). Q: What are the earth's two poles called? Choices: - southwest and south - east and west - west and south - north and south A:
north and south
Q: Answer the following question given this paragraph: Current requires a source of voltage, which is a difference in electric potential energy. Sources of voltage include chemical cells and solar cells. Q: Defined as a difference in electric potential energy, a source of what is required in order to produce an electrical current? Choices: - wattage - momentum - magnetism - voltage A:
A: voltage
Question: Answer the following question given this paragraph: The decay of an unstable isotope to a stable element occurs at a constant rate. This rate is different for each isotope pair. The decay rate is measured in a unit called the half-life. The half-life is the time it takes for half of a given amount of an isotope to decay. For example, the half-life of carbon-14 is 5730 years. Imagine that you start out with 100 grams of carbon-14. In 5730 years, half of it decays. This leaves 50 grams of carbon-14. Over the next 5730 years, half of the remaining amount will decay. Now there are 25 grams of carbon-14. How many grams will there be in another 5730 years? Figure below graphs the rate of decay of carbon-14. Q: The decay rate is measured in a unit called the what? Choices: - decay rate - exponential decay - radioactive decay - half-life A:
Answer: half-life
*Question*
Answer the following question given this paragraph: Q: Which type of muscle fiber can sustain long contractions? Choices: - fast fibres - intense fibers - direct fibers - slow fibers A:
**Answer**
slow fibers
Q: Answer the following question given this paragraph: Physical science is the study of matter and energy. It includes chemistry and physics. Q: What type of science is the study of matter and energy and includes chemistry and physics? Choices: - biology - Earth science - genetics - physical science A:
A: physical science