Answer:
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The outer layers of the star fall inward on the neutron core, thereby crushing it further. The core heats to billions of degrees and explodes (supernova), thereby releasing large amounts of energy and material into space.
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Explanation:
Answer:
The walls observed were plant cell walls, that form the tissue.
Explanation:
Hooke's observation resulted in the discovery of the plant cells, which only began possible when the microscope was invented. As a result, Hooke defined the term "cell" to describe the "cavities" visible under the microscope.
In a controlled experiment, an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. The researcher can operationalize (i.e. define) the variables being studied so they can be objectivity measured.