YR1_T1_LSN7

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

Get ready:

• Your Macbook (join the lessonup)
• Your notebook.
• Your textbook.
• Pen & highlighter
• Calculator

Topic 1: Observing the World

Plan for today

• Recap topic 1 (so far)
• Theory T1.6
• Microscopy

Information:

• People that did not do the microscopy LessonUp got ''HW forgotten''
• Next week: SO about glossary words 
• Week after: Proefwerk about Topic 1 

Recap Topic 1 (so far)

• 1.1 Observing
• 1.2 Working in the lab
• 1.3 Density
• 1.4 Hearing sound
• 1.5 Light and color 

1.1  Properties of substances

examples of properties are:

• color
• phase at room temperature (liquid, gas or solid)
• smell
• taste
• appearance

1.2  Meassuring substances

Measurement	Unit	Symbol	Equipment
Mass	Grams	g	Scale
Volume	Liters	L	Graduate cylinder
Lenght	Meters	m	Ruler
Temperature	Degrees celcius	°C	Thermometer
Time	Seconds	s	Watch or clock

1.2 What is the meaning
of this safety symbol?

1. Toxic
2. Danger for the environment
3. Health hazard
4. Harmful/Irritant

1.3  Density

The unity of density is g/cm³ or g/mL

Density = mass / volume                           

/100                                                       /100                     so:   4g/mL

Mass	Volume
400g	100mL
4g	1mL

1.3 A box has the following measurement:
mass = 132 g & volume = 12 cm³
What is the density? (use your calculator)

1.3  Density

/12                                                       /12                     so:   11g/cm³

Mass	Volume
132g	12cm³
11g	1cm³

1.4 Hearing sound

1.5 How do we see color?

The human eye sees color when light bounces (reflects) off an object and goes into our eye. The color of light that gets reflected is the color that we see.  

All other colors of light get 

absorbed by the object so that 

we don’t see them.

1.5 A Blue light shines on a green grass.
What color grass do you see?

1. Blue
2. Green
3. White
4. Black

Topic 1: Observing the World

LESSON 7

DATE:

Learning Goals:

1.

2.

Key words:

1.

2.

3.

4.

5.

6.

Summary of the day:

1.

2.

Learning Goals:

• I know the difference between an atom, molecule or particle 
• I can explain what atoms are in a molecule based on their formula
• I can explain the process of photosynthesis and know the chemical equation
• I know the parts of the plant cell and can label them on a diagram

Key words:

Particle

Atom

Molecule

Photosynthesis

Organism

Looking at different levels

Macroscopic level is what you can see with the naked eye. Microscopic level we need tools like a microscope to see.

Particles vs molecules vs atoms

Particle is a general term for a small piece of matter.

An atom is the smallest particle of a substance that still has the properties of the substance.

A molecule is formed when atoms 

are bonded together to form a 

different substance.

Build the molecule

Go to the classroom and complete the assignment ''building molecules''. 

You have until the timer runs out.

Building bigger molecules

Small molecules can be combined into bigger molecules. Energy is needed to build these molecules.

A good example is photosynthesis in plants.

With photosynthesis plants use water from the soil and carbon dioxide from the air to build sugar.

Photosynthesis

In photosynthesis the sugar that is built is called glucose. The energy that is needed for building comes from the sunlight.

We can write this 

in a chemical

equation

Plant cell

Nucleus: controls the cell

Cell wall: shapes the cell

Cell membrane: controls the 

contents of the cell

Cytoplasm: inside of the cell

Vacuole: storage bag

Chloroplasts: photosynthesis

vacuole

cell wall

cytoplasm

ribosome

cell membrane

chloroplast

Scientific drawing

Goal: to show the structure of what you see

Important:

• No sketching/coloring/shading: only outlines!
• Only draw what you see
• Everything with pencil, no pens

Prepare for microscopy

• Only need pencil, ruler and notebook, everything else in the bag, bag in front of the room
• Place the tables like this:

• Work in pairs  --> but everyone makes their own drawing

Microscopy draw plant cell

Microscopes are expensive (250+ euro) so make sure you use them carefully

• One person can grab the microscope
  
• Want to go to another magnification, ask me or the TOA
  
• Make a drawing of the plant cell (think of the drawing rules)

Learning Goals:

• I know the difference between an atom, molecule or particle 
• I can explain what atoms are in a molecule based on their formula
• I can explain the process of photosynthesis and know the chemical equation
• I know the parts of the plant cell and can label them on a diagram

Summary of the day:

Homework for lesson 8:

• Complete the exercises on page E40 & E42

Next week = Glossary test (1x) 

• Study glossary Topic 1.1 - 1.6 on StudyGo