Answer the following question given this paragraph: Reactant concentrations are highest at the beginning of a reaction. The plot of [C] versus tis a curve with a slope that becomes steadily less positive. Q: Reactant concentrations are highest at which part of a reaction? Choices: - ending - middle - concurrent - beginning A:
beginning
Answer the following question given this paragraph: Chemical reactions also need energy to be activated. They require a certain amount of energy just to get started. This energy is called activation energy . For example, activation energy is needed to start a car engine. Turning the key causes a spark that activates the burning of gasoline in the engine. The combustion of gas won't occur without the spark of energy to begin the reaction. Q: What do chemical reactions need to be activated? Choices: - food - space - products - energy A:
energy
Q: Answer the following question given this paragraph: Q: Arteries carry oxygenated blood away from the heart, what carries un-oxygenated blood back to the heart? Choices: - glands - intestines - lungs - veins A:
A: veins
Question: Answer the following question given this paragraph: Populations usually grow bigger when they have what they need. How fast they grow depends on birth and death rates. They grow more slowly as they get close to the carrying capacity. This is the biggest population the environment can support. Q: When populations get close to the carrying capacity, what happens to growth? Choices: - halts - dies - spikes - slows A:
Answer: slows
*Question*
Answer the following question given this paragraph: Q: What are misfolded versions of normal brain proteins? Choices: - ribosomes - protons - humans - prions A:
**Answer**
prions
Q: Answer the following question given this paragraph: A solution is a mixture of two or more substances, but it's not just any mixture. A solution is a homogeneous mixture. In a homogeneous mixture, the dissolved particles are spread evenly through the mixture. The particles of the solution are also too small to be seen or to settle out of the mixture. To put solutions in context as a type of mixture, watch the video at this URL: http://www. youtube. com/watch?v=z2vM-G5I92U . Q: A solution is what type of mixture, where the dissolved particles are spread evenly through the mixture? Choices: - saline - gaseous - heterogeneous - homogeneous A:
A: homogeneous