The decay of which radioisotope can be used to estimate the age of the fossilized remains of an insect?
(1) rn-222 (3) co-60
(2) i-131 (4) c-14

Which of the following two events occur to create a sea breeze? select all that apply. warm air rises on the ocean and moves toward the land to cool warm air rises on land and moves toward the ocean to cool cool air moves from the ocean to be warmed by the land cool air moves from the land to be warmed by the ocean

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction

Can someone me with 3 and 4 plz. this is for masteries test.