To demonstrate the arrangement of atoms in liquids, a teacher tapes off a circular section on the classroom floor. how should the students modeling as atoms of liquids stand or move in the taped-off section? leave half the space in the circle vacant and move around holding hands move into the circle, a few at a time, and run randomly over the entire section run quickly, a few at a time, and pretend to bump off the boundary of the circle crowd very close together so that there is no space inside the section to move

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

Texas has an impending storm, and california is experiencing a water crisis. match the technologies with the state that can use them to reduce the effects eddies natural hazards. texas is the storm cellar and the wood that is crisscrossed. california is the dam and the storage tanks

How does secondary succession differ from primary succession?