Read the passage below and choose the right answer to the following question (choices are basic or acidic ): With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH. If you found something with very few hydrogen ions it would be basic or acidic?
basic

Read the passage below and choose the right answer to the following question (choices are more likely or less likely ): At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react. If Mona is filling a balloon with helium and she adds more gas to it, what happens to the likelihood that the helium particles will collide with each other more likely or less likely?
more likely

Read the passage below and choose the right answer to the following question (choices are expanding or contracting ): When your brain senses that your body temperature is increasing, it sends messages to the blood vessels in the skin to increase in diameter. Derek felt cold as he stood in the shade, and since his body was cooling down, he knew that his blood vessels in his skin were expanding or contracting?
contracting