7Th Grade Science 5 WK Exam Review

7th Grade Science 5 WK Exam Review

Vocabulary

Hypothesis Independent Variable Dependent Variable Control Group Qualitative Data Quantitative Data Evidence Inference Placebo

Skills/Concepts: Answer the following questions to help you study for the exam.

1. Andy's nightly chores include washing the family dishes. His mother tends to cook everything that she prepares a bit too long. Because of this, Andy spends a lot of sweat, effort, and time washing the dishes. He sees a commercial on television that claims that brand X dishwashing detergent cuts through grease better than its competitor brand Y.

What is Andy’s hypothesis? What is the dependent variable? The independent variable? What should he use as a control?

2. Use the following data chart to create a simple line graph (on graph paper). Make sure you label the X & Y axis, title the graph and use a ruler on your line! Growth of Mold over a 6 day period Day Growth (cm) 0 0 1 .5 REMEMBER: T A I L S 2 1 3 3.5 (what do those letters stand for?) 4 7 5 2 6 1.4 3. Explain the difference between qualitative and quantitative data. Give an example of each. 4. Identify potential flaws in an experimental procedure 5. Explain the difference between evidence and inference.