Answer:
papermaking, printing, the compass, and gunpowder
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A nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy.
Experiments different from all other types of research studies as they involve the manipulation of control variables and a random number generator or a lottery method are the different ways to assign participants to groups.
Experiment in a research study strictly adheres to a scientific research design. It includes a hypothesis and a variable that can be manipulated by the researcher and variables that can be measured, calculated and compared.
Each individual has an equal probability of being assigned to either group. Random assignment helps to make sure that members of every group within the experiment are the same.
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The crook represented kingship (in that it compared the people of Egypt to a flock and their leader a shepherd) and the flail represented the land's fertility, as it is a farming tool.
