Comp Sci 2 CFE Review

Front

What is an independent variable?

Back

An independent variable is the factor that is changed or controlled in an experiment to test its effects on the dependent variable.

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What is a dependent variable?

Back

A dependent variable is what is measured in an experiment; it is affected by changes in the independent variable.

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What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

How do you determine which object has less kinetic energy?

Back

Compare the velocities and masses of the objects; the one with lower mass or lower velocity has less kinetic energy.

Front

What does it mean for an element to be radioactive?

Back

An element is said to be radioactive if it has unstable nuclei that break down and release particles and energy.

Front

What is the half-life of a radioactive substance?

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The half-life is the time required for half of the radioactive atoms in a sample to decay.

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What is the principle of superposition in geology?

Back

The principle of superposition states that in undisturbed rock layers, the oldest layers are at the bottom and the youngest are at the top.

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What is the scientific method?

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The scientific method is a systematic process for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge.

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What is a hypothesis?

Back

A hypothesis is a testable prediction about the relationship between two or more variables.

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What is an experiment?

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An experiment is a procedure carried out to support, refute, or validate a hypothesis.