Answer the following question given this paragraph: All the atoms of a given element have the same number of protons in their nucleus, but they may have different numbers of neutrons. Atoms of the same element with different numbers of neutrons are called isotopes. Many elements have one or more isotopes that are radioactive. These isotopes are called radioisotopes . Their nuclei are unstable, so they break down, or decay, and emit radiation. Q: All the atoms of a given element have the same number of what in their nucleus, though they may have different numbers of neutrons? Choices: - molecules - electrons - compounds - protons A:
protons
Answer the following question given this paragraph: Q: What type of response do signal transductions within target cells bring about? Choices: - resporatory - bacterial - psychological - physiological A:
physiological
Q: Answer the following question given this paragraph: Materials that have high resistance to electric current are called electric insulators . Wood, rubber, and plastic are examples of electric insulators. Dry air is also an electric insulator. Q: What are materials that have high resistance to electric current called? Choices: - power insulators - motion reducers - cooling insulators - electric insulators A:
A: electric insulators
Question: Answer the following question given this paragraph: All combustion reactions are exothermic reactions. During a combustion reaction, a substance burns as it combines with oxygen. When substances burn, they usually give off energy as heat and light. Look at the big bonfire in the Figure below . The combustion of wood is an exothermic reaction that releases a lot of energy as heat and light. You can see the light energy the fire is giving off. If you were standing near the fire, you would also feel its heat. Q: All combustion reactions are what type of reactions? Choices: - flammable - geothermal - reversible - exothermic A:
Answer: exothermic
*Question*
Answer the following question given this paragraph: Infrared light is light with the longest wavelengths and lowest frequencies. You can't see infrared light, but you can feel it as heat. Besides the sun, flames and living things give off infrared light. Q: What type of light can you feel as heat but not see and has the longest wavelengths and lowest frequencies? Choices: - solar light - ultraviolet light - thermal light - infrared light A:
**Answer**
infrared light
Q: Answer the following question given this paragraph: Rising air currents carry water vapor into the atmosphere. As the water vapor rises in the atmosphere, it cools and condenses. Condensation is the process in which water vapor changes to tiny droplets of liquid water. The water droplets may form clouds. If the droplets get big enough, they fall as precipitation. Q: Clouds are formed from what? Choices: - ice crystals - snow flakes - dust particles - water droplets A:
A: water droplets