A given volume of a denser substance is heavier than the same volume of a less dense substance. John was weighing some materials in his science lab. He observed that as objects had lower density, the heaviness of the objects Increased or Decreased?
Decreased

(Question)
Warm water cant hold as much dissolved oxygen as cool water, so an increase in the temperature of water decreases the amount of oxygen it contains. Jeff heated the pot of boiling water. What happens to the dissolved oxygen contained within the water it increases or it decreases?
(Answer)
it decreases

Ques: More dense water takes up less space than less dense water. Jan poured a liquid solution into a bottle and the solution was not dense, so in the bottle it took up more room or less room?
Ans: more room

(Q).
Anaerobic exercises cause muscles to get bigger and stronger. Ron went to the gym and lifted weights as usual. If he stops lifting weights, his muscles will likely grow or shrink?
(A).
shrink

Ques:However, the melanocytes of people with darker skin produce more melanin. Jim's skin was noticeably lighter than his friend Matt's skin. This means that Jim or Matt produces more melanin?

Ans:Matt

A sunscreen with a higher SPF value protects the skin longer. John was analyzing some of the results from his sunscreen study. He found that a lower SPF protects the skin Shorter or Longer?
Shorter