The earth's crust, which includes all the continents and ocean basins, is divided into several pieces known as tectonic plates. these plates collide with, pull away from, and slide alongside each other as they move around on top of a more gradually deformable layer of the earth. a. less dense; hotter b. denser; colder c. less dense; colder d. denser; hotter

Nitrofurantoin used during the fifth week of pregnancy places the neonate at risk for which condition?

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

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?