PMA 3 Science Review

The idea that all living things are composed of cells, the cell is the basic unit of structure and function, and all cells come from cells is known as the

• Theory of relativity

• Agenda Theory

• Cell Theory

• Theory of naturalization

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Which term refers to the process by which individuals that are better suited to the environment survive and reproduce therefore passing down their genes to their offspring? 

• Evolution 

• Variation 

• Adaptation

• Natural Selection 

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Two organisms that are closely related would have

• very similar DNA sequence

• exactly the same DNA sequences

• no proteins in common

• completely different DNA sequence

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A basic principle for scientific research is that the experiment must be able to be replicated. What happens when an experiment is replicated?

• A scientist publisher accepts the experimental results for printing.

• No one in the scientific community agrees with the methods or results.

• Other scientists perform the same experiment and get comparable results

• The scientific researcher preforms the experiment many times and gets the same results.

The scientific community communicates its finding to the rest of the world by publishing its work in scientific journals. This enables others to replicate and repeat other scientists’ experiments to accept or reject the hypothesis and conclusions of others. However, individual scientists do not submit their work to the scientific community before making sure they are right. How best can they ensure that their results are valid?

• Scientists hire editors to review their lab reports to make sure that their explanations are clear and concise and to change anything that doesn’t sound good.

• Scientists partner with mathematicians to check over all their data and charts and graphs to ensure that there is enough data, but if not, they can add to the data.

• Scientists repeat their experiments just a few times to show that they can get the same results more than once and to catch any mistakes in the procedure.

• The scientists repeat their experiments over and over many times to ensure that they have taken everything into consideration to communicate quality results.

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A _____________________ is something that scientists use to represent an object or process

• mass

• matter

• model

• weight

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___________________ is an explanation for many observations

• meniscus

• weight

• law

• theory

When scientists create a representation of a complex process, they are:

• inferring

• predicting

• classifying

• making models

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What will cause an object to move?

• Applied forces

• Balanced forces

• Unbalanced forces

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What is the unit to MEASURE force?

• Kilogram

• Meter

• Pounds

• Newton