Lower rock layers were laid down earlier, so they are assumed to contain older fossils.  Gerald laid down many rock layers. The layers on the bottom level were likely laid first or last?
first


(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.  The warmest or coldest waters have the least dissolved oxygen?
(Answer)
warmest


Ques: As greenhouse gases increase, changes will be more extreme.  If greenhouse gases were greatly increased, we can expect a higher or lower chance of extreme changes?
Ans: higher


(Q).
When particles move more quickly, temperature is higher and an object feels warmer.  By filling up a party balloon with faster moving Helium particles from a gas cylinder as opposed to slower ones, would the temperature of the balloon be higher or lower??
(A).
higher


Ques:More dense water takes up less space than less dense water.  If Mona lowers the density of her water by adding chemicals to it, what happens to the space it takes up inside of her pesticide bottle increases or decreases?

Ans:increases


Ques:The more similar the DNA molecules of different species are, the closer the relationship is likely to be.  Two species with dissimilar DNA should have a close or distant relationship?

Ans:
distant