You are a forensic scientist working at a crime scene outside along a fairly busy road. It is late at night and it is beginning to rain. You must finish what you are working on before the rain ruins the evidence. Because it is dark, you are afraid you will be
hit by a passing car and decide to set up flares to divert traffic around the area. The labels on the flares have been partially
torn and you cannot read which ones will burn when wet, so you look at the ingredient label on each one for a clue. Which
flare should you use?

mention the spill to the teacher clean the area and throw the broken pieces away

explanation:

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

explanation:

0.07 g/cm³

1.37 g/cm³

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.