YR1_T1_LSN6

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

Science: Lesson 6

Get Ready:

• Textbook
• Notebook
• Macbook
• Google Classroom
• Kwizl
• Lessonup

Plan for today: 

1. Check your homework. (check your homework for mistakes and discuss this with your group members.)
2. Start Topic 1.5. (Read the text, take down new notes and get instructions for upcoming lessons).
   
3. Check your quiz. (Discuss the quiz and complete the reflection form so you know what you can improve.) 
4. Microscope prep. (brief instructions on how to use a microscope in preparation for the next lesson).

Answers hw exercises:

35.  The faster the vibrations, the higher the frequency.

The bigger the amplitude, the louder the sound

The longer the wavelength, the lower the frequency

The smaller the amplitude, the softer the sound

36.  energy, vibrate, vacuum, softer, spread

37. The higher the frequency (Hertz, or: Hz), the higher the pitch:

35 Hz

200 Hz

387 Hz

Answers hw exercises:

38. Answer is: B.

Why? Sound wave 2 is louder than sound wave 1, so the amplitude of sound wave 2 is higher than A. And sound wave 2 is lower in pitch than sound wave 1, so the frequency of sound wave 2 is lower than f (the frequency of sound wave 1).

39.Amplitude of sound wave 1 = 4. Amplitude of sound wave 2 = 3.

Sound wave 2 has a higher pitch, as there are more vibrations and the sound waves are faster than for sound wave.

40. The second sound wave will sound louder, because of the greater amplitude. The second sound wave will have a higher pitch, because of the shorter wavelength (and higher frequency).

Answers hw exercises:

41. 

42. Astronauts are in space, which is a vacuum. There are no particles that can vibrate and pass on the sound.

43. The low pitch from the bass drum you can hear long before the piccolo, which is high pitch. This is because the wavelength of the bass drum is much longer than that of the piccolo. And the longer wavelength reaches your ear earlier.

44. In a vacuum sound cannot travel, because in a vacuum there are no particles that can vibrate and pass on the sound.

LSN 6-T1.5: Light and Colour 

• I can explain what a light wave is and how it travels.
• I know what all the colours of the visible spectrum are, in order from lowest to highest frequency.
• I know that white light is a combination of all colours in the visible spectrum.
• I know what colours of light are reflected or absorbed based on an object’s colour.
• I know that white objects reflect all light and black objects absorb all light.

1. • *VWO ONLY - I know what color an object will appear when a
2. colored light shines on it

p. 32-37

LSN 6 - T1.5: Light and Colour 

Keywords:

• light
• visible spectrum
• reflect
• absorb

p. 32-37

Light

• Is a form of energy that travels in waves, but unlike sound, light does not need molecules to help it spread.
• Allows people and animals to see things.

p. 32-37

Light Sources

• There are 2 types of light sources
• Natural light
• The sun and stars
• Fire
• Lightening
• Artificial light
• A lamp
• Telephone screen
• Laser 
• 
  

p. 32-37

Light Sources

The visible spectrum is made of the colours we can see with the naked eye. Different colours of light have different frequencies.
Which color has the lowest frequency? The highest?

p. 32-37

White Light

White light is made of all the colours of the visible spectrum.

We can split white light into its colours by using a prism.

p. 32-37

How do we see colour?

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.

p. 32-37

Seeing black and white

White objects reflect all the colors 

which together make the color white.

Black objects absorb all the colors 

so there is nothing left to see.

p. 32-37

Coloured light

Different colours of light can have an effect on what color an object appears to be.  

p. 32-37

Discussing the quiz:

T. 1.1-1.3

Check your mistakes. Discuss this in your groups and make sure you take notes. 

There is a test about this chapter after the holidays, this includes these Topics.

Is everything clear now?

T. 1.1-1.3

Homework for next time:

• Questions 45 until 55
• Work through the lessonup on how to use the microscope

p. 32-37