YR1_T1_LSN2

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

YEAR 1 SCIENCE

Plan for today:

• Explanation Lab journal 
• Testing heart rate

What is a lab journal?

• A lab journal is a journal for your laboratory experiments
• A record of your aims
• Practical performance and results of experiments
• The processing and analysis of the results

Research cycle

Lab journal start

Front: 

• Name
• Class

First pages:  (you can also glue the cheat sheet on the first page)

Table of content:

• Title
• Page number 
• Date of skill lesson

How to use it? Preparation

Before each experiment: (write this in your lab journal as homework)

• Title and date (and labpartner)
• Research question 
• Hypothesis
• Materials
• Method
• Safety

(you can find a lot of information on your worksheets) (worksheets are on classroom)

Method

You can write or draw your steps:

(write by using your own words!)

How to use it? During/after experiment

During each experiment:

• Fill in your worksheet
• Take notes

After each experiment:

• Glue or write the results in your lab journal
• Reflect on your results (discussion & conclusion)

Make sure you are prepared!

The TOA will check all your lab journals before entering the lab

NO PREPARATION = NO ENTRY

Testing heart rate

A practice in using a lab journal 

Learning goals

During each experiment, you will learn something, these goals are the learning goals. Write down the following learning goals in your lab journal:

Learning goals this experiment:

• I can measure my heart rate
• I can perform a research cycle
• I can use my lab journal

Preparation (left page)

Before each experiment: (write this in your lab journal as homework)

• Title and date (and labpartner)
• Research question 
• Hypothesis
• Materials
• Method
• Safety

(you can find a lot of information on your worksheets) (worksheets are on classroom)

Research question

Each experiment has a question you want to answer, this is called the research question.

Write the following research question in your lab journal:

Research question:

What is the effect of exercising on the heart rate?

Hypothesis

During each experiment, you have certain expectations about the outcome of your research question, this is called the hypothesis.

Formulate your hypothesis and write it in your lab journal:

Hypothesis:

While exercising, the heart rate will ___________, because...

Materials

For each experiment, you need tools to perform the experiment. These are listed as materials:

Write all the materials you'll use for the experiment in your lab journal.

Materials:

• Heart rate monitor

Procedure

Each experiment requires you to follow certain steps to do the experiment, these steps are found in the method.

Draw or write (in your own words) the steps of the method for checking your heart rate in your lab journal:

1...

2...

3...

Procedure

1. Check the instruction picture on the heart rate monitor (on the band) 
2. Put the heart rate monitor on your forearm as shown in the picture.
3. Hold your arm as shown in the picture.
4. Press the green button and wait till you get the results
5. Record your pulse/min (on the next page at results)
6. Repeat the entire experiment a second time, but now exercise first 
7. (as exercise: jog in place, jump up and down, run up the stairs etc)

Safety

Some experiments have risks that are specific for the experiment you are going to do. These risks are found in the safety. (sometimes you have to research safety yourself, if it is not provided by us)

As preparation: write down the specific safety rules in your lab journal.

Safety: 

Make sure you check your surroundings while running around.

Completing the experiment

(right page)

During your experiment, you obtain data. You write this data down in your results.

Copy the table below and fill in the results:

Results:

	Heartrate (beats/min)
First measure: (before exercise)
Second measure: (after exercise)

Conclusion

After the results are collected, you are going to report your findings. This is called the conclusion.

After the experiment write down your conclusion in your lab journal 

Conclusion:

In this experiment the heart rate before exercising was_________ beats/min and after exercising the heart rate was_________beats/min. This means that the heart rate ____________ after exercising.

Discussion

After the results are collected, you are going to compare them to your hypothesis (prediction) to see if they match or not. This is called the discussion. In the discussion you are going to do online research to find out why your outcome is right or wrong.

After the experiment write down your discussion in your lab journal 

Discussion (is your hypothesis correct?)

Explain why your observations/results match your hypothesis or not. (you can use the internet)

Homework:

• Complete the exercises on page E6.
• Review your notes from T1.1.
• Study the Glossary of Topic 1.1 on StudyGo.