identify at least five pure substances found in nature in the supermarket grocery store and even at your home use the table below to explain your answer based on appearance separating techniques boiling and melting point

Ineed the problem dude

Defidently don't start answering as quick as possible some teachers do say to read the hardest first but i would think the most logical answer is c carefully read the passages and i structions

Cbecause they dump truck

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.