Acids have pH values below 7. The lower the pH value, the more strongly acidic the substance. Having read the above passage, choose the right answer to the following question (choices are it would decrease or it would increase ): Milo was playing around with water by changing the pH level. If he lowered the pH what would happen to the acidity of the solution it would decrease or it would increase?
it would increase

Exhaling, or breathing out, decreases the size of the chest, which increases air pressure inside the lungs. Having read the above passage, choose the right answer to the following question (choices are increases or decreases ): If Mary is running and race and begins to breathe hard, what happens to the air pressure in her lungs as she constricts her chest increases or decreases?
increases

Q: With higher frequencies, the microwaves also have more energy. Having read the above passage, choose the right answer to the following question (choices are less or more ): Lonnie increased the frequency of some microwaves he was working with. The resulting microwaves now contain less or more energy?
A: more

Question: On a hot day, an endotherm may give off more heat by increasing blood flow to the surface of the body. Having read the above passage, choose the right answer to the following question (choices are decreases or increases ): When it gets hot out what happens to our blood flow decreases or increases?
Answer: increases

*Question*
The more efficient a device is, the greater the percentage of usable energy it produces. Having read the above passage, choose the right answer to the following question (choices are more or less ): If a device were to become more efficient, it would produce more or less usable energy?
**Answer**
more

Q: When a person exercises regularly, and is fit, the heart undergoes certain long-term adaptations. The heart muscle gets stronger, and expels more blood with each contraction. Having read the above passage, choose the right answer to the following question (choices are Rich or Paul ): Rich works out every day. Paul does not work out at all. Whose heart expels less blood per contraction, resulting in lower BPM Rich or Paul?
A: Paul