*Question*
Q: In a smoke detector, a battery in the electric circuit creates what between the metal plates? Read this paragraph and choose the correct option from the provided answers: Most of us have at least one device in our homes that guards our safety and, at the same time, depends on radioactivity to operate properly. This device is a smoke detector. A typical smoke detector contains an electric circuit that includes two metal plates about 1 cm apart. A battery in the circuit creates a voltage between the plates. Next to the plates is a small disk containing a tiny amount (0.0002 g) of the radioactive element americium. The radioactivity of americium ionizes the air between the plates, causing a tiny current to. Choices: - magnetism - hydrogen - cooling - voltage A:
**Answer**
voltage

*Question*
Q: Catalysts can greatly increase the rates of chemical what? Read this paragraph and choose the correct option from the provided answers: and procaine. Not only do catalysts greatly increase the rates of reactions, but in some cases such as in petroleum refining, they also control which products are formed. The acceleration of a reaction by a catalyst is called catalysis. Choices: - photosynthesis - decay - effects - reactions A:
**Answer**
reactions

*Question*
Q: What types of blood cells are required for aerobic respiration? Read this paragraph and choose the correct option from the provided answers: Choices: - white blood cells - grey blood cells - large blood cells - red blood cells A:
**Answer**
red blood cells

*Question*
Q: What are two other terms for dizygotic twins, which make good study subjects because they share many environmental conditions, but only about half of their polymorphisms? Read this paragraph and choose the correct option from the provided answers: Dizygotic twins (fraternal or non-identical) share only about half of their polymorphisms. These twins are helpful to study as they tend to share many aspects of their environment. As they are born in the same place, usually within a few minutes of each other, they share many environmental conditions. They had the same in utero environment, they usually have a similar or the same parenting style during their childhood, and a similar or the same education. Similarities during childhood usually occur with wealth, culture, and their community. Choices: - fractional - identical twins - interdependant twins - fraternal, non-identical A:
**Answer**
fraternal, non-identical