Scientists decide the age of different rock layers by the things that they uncover in the rock. which of the items below could scientists use to date a layer of rock?
an insect flying near the dig site
a fossilized fish
a raindrop on the rock
a green leaf that fell off of a tree

The correct answer is B. a fossilized fish

That is because the scientist can use carbon dating to find the age of the fish, and that will tell the scientest the date of the layer of rock. :)

The answers are very vague but basically the nonmetal group would be anything but the middle —

So the nonmetals would be the first , second group and then the last group, second to last group, all the way until you see B for Boron. Anything in the middle of the periodic table is a metal. So I would say along the top but to note, there are particular elements in group that aren’t along the top of the periodic table that would be considered a nonmetal!

I hope this helps you and if you are still confused let me know! :)