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Year 6 Science – Week 5
Lesson 1 - Monday
Key Words You Will Meet This Week:
*Energy: It is the property of matter and space, objects and fields. It can be transferred
between objects and can also be converted in form; how much potential a physical system
has to change.
*Wavelengths: It is the distance from crest to crest, or from point on one wave cycle to the
corresponding point on the next adjacent wave cycle.
*Electromagnetic waves: It is electromagnetic radiation such as radio wave, microwaves,
infrared, visible light, ultraviolet, X-rays, and gamma rays.
*Atoms: An atom is the smallest constituent unit of ordinary matter that has the properties of
a chemical element.
*Electrons: it is a subatomic particle; whose electric charge is negative one elementary
charge
*Photons: A type of elementary particle that has zero mass and always moves at the speed
of light within the vacuum.
Learn
1. A dark shadow will be cast by a transparent object.
True or False?
2. Light enters our eyes through our…
a) Retina
b) Iris
c) Pupil
d) Lens
3. Name 2 things that can happen when light hits an object.
4. Why is it important to change only one thing at a time during a scientific test?
Knowing more, remembering more
Learn
What do you think?: Can we touch a rainbow?
Learn
Recap
• Light travels in straight lines
• It is faster than the eye can see (light speed)
• Light cannot travel through opaque objects
• We see objects because light reflects off them and bounces into our eyes
Learn
Do you think shiny surfaces are better or worse at reflecting light?
Why/why not?
Learn
Smooth, shiny surfaces such as mirrors and polished metals reflect light well. Dull and dark surfaces such as dark fabrics do not reflect light well.
There are three things that can happen when light hits something: it can pass through (if the object is transparent), be absorbed (if the object is opaque and darkly colored), or it can reflect back again (if the object is shiny, light-colored, and reflective).
PracticeWhen people look into a mirror, they see an image of themselves behind the glass. That image results from light rays encountering the shiny surface and bouncing back, or reflecting, providing a "mirror image."
Using a mirror and a torch, what observations can you make about light and reflection? Write them down as an observation.
Example
When I shine my torch onto the mirror I notice that …
This explains that …
This has brought about the question of …
Lesson 2 - Tuesday
Key Words You Will Meet This Week:
*Energy: It is the property of matter and space, objects and fields. It can be transferred
between objects and can also be converted in form; how much potential a physical system
has to change.
*Wavelengths: It is the distance from crest to crest, or from point on one wave cycle to the
corresponding point on the next adjacent wave cycle.
*Electromagnetic waves: It is electromagnetic radiation such as radio wave, microwaves,
infrared, visible light, ultraviolet, X-rays, and gamma rays.
*Atoms: An atom is the smallest constituent unit of ordinary matter that has the properties of
a chemical element.
*Electrons: it is a subatomic particle; whose electric charge is negative one elementary
charge
*Photons: A type of elementary particle that has zero mass and always moves at the speed
of light within the vacuum.
Learn
Recap
Let’s act as a mirror!
With someone in your home:
P1 move in a certain way
P2 show how a mirror would reflect this
A reflection appears to be the same distance from the "other side" of the mirror as the viewer's eyes are from the mirror.
Also, when light is reflected from a mirror, it bounces off at the same angle in the opposite direction from which it hit.
Example: If the light hits a flat or "plane mirror" at a 30-degree angle from the left, it will bounce off at a 30-degree angle to the right.
Learn
Learn
Normal- the point where a ray of light strikes a reflective
surface
Incident ray- ray of light that strikes the surface
Reflected ray- ray of light reflected by the surface
Angle of reflection-the angle in which the light reflects off the mirror
Angle of incident- the angle in which the light hits the mirror
Mirror
Scientific Diagram
Apply
Your task is to recreate the scientific diagram on the previous slide of how light reflects off of a mirror in your exercise books.
Ensure you label it correctly and write a paragraph or more about what is happening using scientific vocabulary.
Write a scientific description of the process of reflection by thinking about:What surfaces reflect best? Why?How does light reflect?
Lesson 3 - Wednesday
Key Words You Will Meet This Week:
*Energy: It is the property of matter and space, objects and fields. It can be transferred
between objects and can also be converted in form; how much potential a physical system
has to change.
*Wavelengths: It is the distance from crest to crest, or from point on one wave cycle to the
corresponding point on the next adjacent wave cycle.
*Electromagnetic waves: It is electromagnetic radiation such as radio wave, microwaves,
infrared, visible light, ultraviolet, X-rays, and gamma rays.
*Atoms: An atom is the smallest constituent unit of ordinary matter that has the properties of
a chemical element.
*Electrons: it is a subatomic particle; whose electric charge is negative one elementary
charge
*Photons: A type of elementary particle that has zero mass and always moves at the speed
of light within the vacuum.
Learn
Yesterday we spoke about reflection.
Today we will explore refraction and carry out an observation of refraction.
Let’s recap our learning.
Recap
Equal AnglesAngle of Incidence
Angle of Reflection
Mirrored Surface
Recap
Rules of Reflection Angle of Incidence = Angle of Reflection
• Everything in the reflected image is laterally inverted.
• The reflected image is as far behind the mirror surface as the object is in front.
• The reflection in a plane mirror is the same size as the object.
Recap
Scattered and Reflected Light
Rougher surfaces scatter light in many different directions – this is called a diffuse reflection.
Completely smooth surfaces like a mirror will reflect light in a specific direction.
Mirror Paper
Learn
Light Refraction
Refraction = the bending of light rays
For Example:
• When they enter a more dense medium e.g. water - the ray slows down.
• When they enter a less dense medium e.g. air - the rays speed up.
Refraction happens as the rays travel at a slightly different speed
LearnLight Refraction Through Glass
and Water
Glass Water
60°
34.5°
60°
60°
40.6°
60°
Practice
Use a clear plastic cup or bowl filled with water and a colourful straw/pencil to experiment refraction.
Place your hand in bowl.
Observe – what do you notice?
ApplyWrite up an observation and analysis:
1. What did you notice when looking through the water?
2. What did the image on the other side look like?
3. Why do you think this was the case?
Lesson 4 - Thursday
Key Words You Will Meet This Week:
*Energy: It is the property of matter and space, objects and fields. It can be transferred
between objects and can also be converted in form; how much potential a physical system
has to change.
*Wavelengths: It is the distance from crest to crest, or from point on one wave cycle to the
corresponding point on the next adjacent wave cycle.
*Electromagnetic waves: It is electromagnetic radiation such as radio wave, microwaves,
infrared, visible light, ultraviolet, X-rays, and gamma rays.
*Atoms: An atom is the smallest constituent unit of ordinary matter that has the properties of
a chemical element.
*Electrons: it is a subatomic particle; whose electric charge is negative one elementary
charge
*Photons: A type of elementary particle that has zero mass and always moves at the speed
of light within the vacuum.
Learn
Recap
Refraction Refraction is what happens to light when it travels through a substance.
1) It slows down
2) It changes direction
Refraction can create illusions. Because light bends when it travels between air and water, glass or plastic, objects can look bent or distorted.
Recap
White light is made of lots of different colours. When it hits the prism it refracts (slows down and changes direction).
Different colours (different wavelengths) are refracted by different amounts helping to show the different colours of light.
Apply
Use a prism to see the effect of refraction and how it makes a rainbow.
Refraction Through A Prism
You are going to make a water prism.
Making a water prism is easy. 1. Just fill up a glass dish with
water, place a mirror in at an angle.
2. Find a sunny spot to reflect the sunlight through the water.
Voila! A water prism!
1
2
Apply
Refraction Through A Prism
Once you have made your water prism you can experiment with how the angle of the mirror affects the location and look of the rainbow.
1. How do other liquids affect the rainbow? Try out other liquids you have at home.
2. What happens if you add food coloring into your water prism?
3. Can you make a water prism without the mirror?
What can I do with my water prism?
Lesson 5 - Friday
Key Words You Will Meet This Week:
*Energy: It is the property of matter and space, objects and fields. It can be transferred
between objects and can also be converted in form; how much potential a physical system
has to change.
*Wavelengths: It is the distance from crest to crest, or from point on one wave cycle to the
corresponding point on the next adjacent wave cycle.
*Electromagnetic waves: It is electromagnetic radiation such as radio wave, microwaves,
infrared, visible light, ultraviolet, X-rays, and gamma rays.
*Atoms: An atom is the smallest constituent unit of ordinary matter that has the properties of
a chemical element.
*Electrons: it is a subatomic particle; whose electric charge is negative one elementary
charge
*Photons: A type of elementary particle that has zero mass and always moves at the speed
of light within the vacuum.
Learn
Learn
Light and Energy• The word light usually refers to visible light, which is
the visible spectrum that is visible to the human eye and
is responsible for the sense of sight.
• The spectrum of white visible light include red, orange,
yellow, green, blue, indigo and violet. This is the rainbow
you observed yesterday.
• Different sources of light produce different patterns of
spectrum.
• The colour of the spectrum is corresponding to the
different energy level of atoms.
• For example, copper produces a blue colour when burnt
and sodium produces a yellow colour.
Learn
The colours of the visible light spectrum are
red, orange, yellow, green, blue and violet.
The visible spectrum of light is the portion of
the electromagnetic spectrum that is visible
light.
When you heat an atom, some of its electrons
may be "excited” to higher energy levels and
produce different colours when spontaneously
they release that energy.
copper produces a blue colourwhen burnt
sodium produces a yellow colour when burnt.
Learn
What are images made from?
Pixels make pictures and videos. There are millions and billions of pixels in a picture (or video) , however they are so small that you are not able to see them without a microscope.
Pixels are the building blocks of images. If you were to put a microscope over your phone/TV/tablet screen you’d see all the different coloured pixels that make up one image.
Learn
Building blocks of images: Pixels
Pixels come in specific shapes, they are squares. They also only come in three colours: red, green and blue.
The colours are different because the light of atoms are different.
Now what do you think: Can we touch a rainbow?
Apply
Apply
Testing the Knowledge
1. What do we call the process of light changing direction or slowing down when it passes through a medium like glass of water?
2. Do all wavelengths of light change direction the same amount as each other?
QLA: Ask a question to show your thinking!
Assessment
Answer the questions on the following slides, then self-assess using the answers on the last slide.
Assessment
Assessment
Assessment Answers
Light Ray
Angle of incidence
Angle of reflection
1.
Assessment Answers
2. We see things when rays from a light source travels straight to our eyes. We also see things when light reflects from objects to our eyes.
3. When an opaque, solid object – such as a hand – is put in front of a light source, light rays are blocked but the object. This then results in a shadow being formed as light can only travel in straight lines. The exception to this would be when light appears to bends via refraction.
4 & 5. No. Jane would not be able to see the lamp because the holes in the screens do not match up in-line with the object, which is the lamp. Light cannot bend and so the image of the lamp cannot bend through the holes in the screen. The only way to do this would be to introduce mirrors to reflect the image (light) towards the eyes.
1. A dark shadow will be cast by a transparent object.
True or False?
2. Light enters our eyes through our…
a) Retina
b) Iris
c) Pupil
d) Lens
3. Name 2 things that can happen when light hits an object. Reflection or Refraction
4. Why is it important to change only one thing at a time during a scientific test? To ensure a fair test and to ensure data is reliable. Testing only one variable at a time lets you analyse the results of your experiment to see how much a single change affected the result. If you're testing two variables at a time, you won't be able to tell which variable was responsible for the result.
Knowing more, remembering moreAnswers