With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH. Eric measures 20 hydrogen ions per 100ml in one solution. Another solution has 30 hydrogen ions per 100ml. The solution with more hydrogen ions is more or less acidic?
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(Question)
The more tightly packed the particles inside the material are, the more dense we say they are. Sasha is throwing bottles into the lake. Some bottles are filled with sand, and some only have a tiny bit of sand in them. The bottles filled with sand will sink first because they are less dense or more dense?
(Answer)
more dense

Ques: The hotter a main sequence star is, the brighter it is. Mona is an astronomer who looks at stars for a living. If she is observing how hot certain stars are and she notices that one is cooler then the others, what does that say about the brightness of that star it's dimmer or it's brighter?
Ans: it's dimmer

(Q).
As more resistors are added in series, the total resistance of the circuit increases. If Mona is building a circuit and she adds less resistors in series, what happens to the total resistance of the circuit increases or decreases?
(A).
decreases

Ques:In electromagnetic waves with higher frequencies, photons have more energy. If Mona is standing in the sun and it begins to shine brighter, what happens to the amount of energy the photons are emitting decreases or increases?

Ans:increases

Question: Inhaling, or breathing in, increases the size of the chest, which decreases air pressure inside the lungs. If Mona is running a race and her chest expands, what happens to the amount of air pressure in her lungs increases or decreases?
Answer:
decreases