1.3 Investigate

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

1.3 Investigate

Learning objectives

You will learn how to carry out an investigation step-by-step and how to process the results.

Steps in carrying out an investigation

1. Formulate a research question.

Always one question!

A question that can not be answered with 'yes' or 'no'

Why..
- Are bananas bent?

- Do I have brown hair?

- Is the planet Mars red?

What's a good research question?
1. Do plants grow better with or without fertilizer and how does light influence the growth?
2. Does compost affect the growth of cress plants?
3. How does adding fertilizer affect the growth of cress plants?
*cress = tuinkers, fertilizer = mest

1. 1
2. 2
3. 1 & 3
4. 3

Think of a research question!

 Hypothesis

Hypothesis: What do you expect the answer to your research question will be?

"If .... (fertilizer is added to cress plants)  then... (the plants will grow two times faster) "

(examples?)

2. Make a workplan

How can I get the answer to my research question?

- By viewing or counting something

- By doing an experiment

Method

List of supplies

Workplan

                                     Sample (steekproef)

                                     Quadrat (proefvlak)

- Counting (how many butterflies are there in my garden?)

- Experiment: - careful test of a piece of 'reality'

- Lab setup: setup of the materials you use

3. 3. Collect and process results

The results of an investigation are observations, counts and measurements

DIAGRAMS and  TALLY MARKS

1. Line Chart 2. Bar Chart 3. Pie Chart 4. Tally marks

1. Line chart: How does something increase/decrease?

2. Bar Chart: Numbers

3. Pie chart --> percentages %. Pay attention to the legend

1. Line chart --> How does something increase/decrease?

2. Bar Chart --> Numbers

3. Pie chart --> percentages %. Pay attention to the legend

4. Tally chart --> Counting

4. Draw a Conclusion

Does my experiment answer the research question? What can I make out of this?

Investigate

Homework

Assignments 1.3

4-6, 10-13, 14, 15 (page 26)

Next lesson: working on homework