A Matter of Time

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A Matter of Time
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This Organizing Idea can help you understand the
importance of continuity and change in our world.
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• This six weeks, you can learn about the use of a

grid system
in geography.
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• You can also study the history of life in Plano
  in the late 1800s and early 1900s.

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• You can also construct

timelines
and study
events in Planos history.
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• Finally, you can apply your science process
  skills and observe continuity and change in your
  own life.

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Guiding Questions

• How can changes be both positive and negative?
• What are some things that stay the same over
  time?
• How has life changed between 1900 and the
  present?
• What is matter and what are ways it can change?