Chapter 15: Support, Movement, and Responses - Science

Test Your Hypothesis
Make a Plan
1. As a group, agree upon and write the hypothesis statement.
2. As a group, list the steps you need to test your hypothesis. Describe exactly
what you will do at each step. Consider the following as you list the steps. How
will you know that sight is not a factor? How will you use the card shown on the
right to determine sensitivity to touch? How will you determine that one or
both points are sensed?
3. Design a data table in your Science Journal to record your observations.
4. Reread your entire experiment to make sure that all steps are in the correct order.
5. Identify constants, variables, and controls of the experiment.
Follow Your Plan
1. Make sure your teacher approves your plan before you start.
2. Carry out the experiment as planned.
3. While the experiment is going on, write down any observations that you make
and complete the data table in your Science Journal.
Analyze Your Data
1. Identify which part of the body tested can distinguish between the closest stimuli.
2. Compare your results with those of other groups.
3. Rank body parts tested from most to least sensitive. Did your results from this
investigation support your hypothesis? Explain.
Conclude and Apply
1. Infer Based on the results of your investigation, what can you
infer about the distribution of touch receptors on the skin?
2. Predict what other parts of your body would be
less sensitive? Explain your predictions.
Write a report to share with your class
about body parts of animals that are
sensitive to touch.
LAB 459
Amanita Pictures