Susana heats up a sample of red crystals. While the
sample is being heated, a gas is released and a blue
powder is left after the heating. Is the sample of red
crystals an element or a compound?

Why did the settlement of east texas stop in the late 1710s

What was the name of the theory that said that if one country in a region fell to communism, others would surely follow? 1) domino theory 2) arms race 3) brinkmanship 4) containment theory

Using mr smith and his id, identify two potential internal validity threats that might affect the a—b design. tell me how that threat might impact conclusions in the a—b design. note #1: you cannot use maturation (since i already did that one for note #2: there are some mr smith id threats that won’t have much impact in a single case design.