Making Predictions


The observations you make and the data you collect in an investigation might lead you to make a prediction. A prediction is an idea about what will happen in the future.

Here's an example of a prediction. Imagine that it is the last week of school before summer vacation. You getup before dawn and check your clock just as the sun rises.. The time is 5:20 a.m. On Tuesday, you discover that the sun rises at 5:19 a.m. On Wednesday, the sun rises at 5:18 a.m. You go to school and tell the class, "I predict that the sun will rise at 5:15 a.m. on Saturday."


Your prediction is based on observations you made and data you collected for three days in a row. You noticed a pattern. The sun rose one minute earlier each day. Saturday is three days after Wednesday. So the sun should rise three minutes earlier on Saturday than on Wednesday. You do some simple arithmetic: 5:18 A.M. minus 3 minutes equals 5:15 A.M.