YR1_T1_LSN3

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

Get ready:

• Your laptop 
• Join the LessonUp
• Your notebook.
• Your textbook.
• Your lab journal
• Pen & highlighter

Plan for today:

• Homework check 
• Finish lab journal experiment 
• Theory T1.2 
• Going to the lab

Homework for today:

• Discuss the homework exercises in your groups. 
• If you cannot work it out in your group you can ask me questions. 

Answers:

1. Observing means noticing something by using one or more of your senses: looking, touching, smelling, hearing, tasting.
2. Tools that a scientist uses: weighing scales, a microscope, a ruler, a thermometer.
3. A substance is anything that has mass and takes up space. Substances are physical things that can be touched, seen, observed or measured.
4. Examples of properties of a substance: appearance (how it looks), phase at room temperature (solid, liquid or gas), color, smell, taste and texture
5. Something that is NOT a property of substances: mass, volume and temperature.

Answers:

6. Water and rubbing alcohol are different in taste and smell. Water and rubbing alcohol are both liquid and are both transparent.
7. Something that cannot be classified as a substance does not have mass and does not take up space. For instance: vacuum, music, love, a shadow.
8. Two properties of:
a. bleach: strong smell, yellow color, liquid (at room temperature)
b. candle wax: smooth texture, solid (at room temperature) 
c. olive oil: yellow color, liquid (at room temperature)
d. Paracetamol: solid, white, smell

Answers:

• 9. Ice and water are the same substance, because at room temperature it is always liquid. 
• 10. What could Tom do to keep water, ammonia and cleaning vinegar apart:
• a. He could smell each bottle.
• b. He did use odor as a substance property.
• 11. What metal is more desirable for planes:
• a. Aluminum is desirable for planes as it is strong and also light weight.
• b. Lead is not desirable as it is very heavy.
• 12. How could Sam separate rice from salt:
• a. Sam could take the rice and salt mixture, and put it in water. The salt will dissolve in the water, and the rice will not. Then he could let the rice sink to the bottom and take the salt-water out. Sam could also use a strainer so the rice would stay in the strainer and the salt would fall through.
• b. He uses two properties: (i) that salt is soluble in water and rice is not, and (ii) rice is ‘heavier’ and water, and will sink to the bottom. If he uses a strainer he is using the property of particle size.

Testing heart rate

A practice in using a lab journal 

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...

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)

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)

Topic 1: Observing the World

LESSON 2

DATE:

Learning Goals:

1.

2.

Key words:

1.

2.

3.

4.

5.

6.

Summary of the day:

1.

2.

Learning Goals:

• I can convert between different units in the metric system
• I know the names of the most common lab materials and what they are used for
• I know the lab safety rules and safety symbols
• I know where to find the different safety materials in the lab

Key words:

• lab safety
• measuring equipment
• metric system
• safety symbol

Units:

• One of the best ways to learn about a substance is to measure it in some way.
• When we measure it we put it into units. 

Labrules:

• Always be properly protected. This includes wearing safety glasses and lab coat plus tying back long hair.
• No open shoes and make sure legs are covered (no skirt, shorts...)
• No jewellery (watches, rings...)
• Do not eat or drink anything in the lab
• No running or fooling around --> 1 warning and you are out
• Follow the instructions given for the experiment. 
• If you are in doubt about what you should do then always ask your teacher or the lab technician for help.

Lab time:

• Read the instructions carefully.
• Discuss in your duo what you think you need to do
• Follow your teacher's instructions carefully. 
• Bring your worksheet & lab journal to the lab.

Lab time:

• Work per island
• When the timer goes move clockwise through the classroom

Homework for lessons:

• Complete the exercises on page 12 & 14.
• Review your notes from today.
• Study the glossary of topic 1.2 in StudyGo

Learning Goals:

• I can convert between different units in the metric system
• I know the names of the most common lab materials and what they are used for
• I know the lab safety rules and safety symbols
• I know where to find the different safety materials in the lab