Studies find that women with mates have slightly higher-than-usual sexual desire at ovulation, when there is a surge of and a smaller surge of .

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove

Which technically is nasa developing that will astronauts reach mars

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley