has everything that you need to know such as: periodic table, nutrition and digestion, light, photosynthesis, the eye, sound, fuels and energy, carbon cycle, magnets

1. Science Revision
END OF YEAR EXAM

2. PERIODIC TABLE

3. PERIODIC TABLE

4. WHO INVENTED IT
Dmitri Mendeleev
he is a Russian
scientist who had
made the periodic
table many have
tried but Dmitri has
done it eventually

5. NUTRITION AND
DIGESTION

6. EATING A BALANCED DIET
WHAT MAKES A BALANCED DIET:

7. DIFICIENCY DISEASES/NUTRITION
LACKING/SYMPTOM/WHAT FOOD CAN TREAT DISEASE

8. LIGHT

9. PROPERTIES OF LIGHT
LIGHT ALWAYS TRAVELS IN DEAD STRAIGHT LINES
1)THE LIGHT TRAVELS IN STRAIGHT LINES FROM THE
SHEEP TO THE TRACING PAPER SCREEN THROUGH THE
PINHOLE. BECAUSE THE HOLE IS SMALL,ONLY ONE RAY
GETS FROM EACH POINT.
2) THE IMAGE OF THE SHEEP SEEN BY THE FARMER IS
UPSIDE DOWN AND CROSSED OVER. THIS IS BECAUSE
THE RAYS OF LIGHT CROSS OVER INSIDE THE CAMERA
AS SHOWN:

10. REFLECTION AND REFRACTION
LIGHT REFLECT OFF MANY THINGS.
THE LAW OF REFLECTION:
ANGLE I=ANGLE R
DO DRAW THIS RAY DIAGRAM MAKE
SURE YOU DRAW STRAIGHT LINES
AND GET THE ANGLES THE SAME-
USE A PROTRACTOR

11. REFLECTION AND REFTRACTION
WHEN LIGHT GOES THROUGH LESS DENSE MEDIUM TO A MORE DENSE
MEDIUM: LIGHT BENDS TOWARDS THE NORMAL EXP.AIR TO GLASS
WHEN LIGHT GOES THROUGH MORE DENSE TO LESS DENSE : LIGHT
BENDS AWAY FROM THE NORMAL EXP.GLASS TO AIR

12. COLOUR
DISPERSAL OF WHITE LIGHT: SPECTRUM
IN THE SPECTRUM YOU CAN SEE THE COLOURS OF A RAINBOW THE
VIOLET IS BENT THE MOST
CLICK ON THE LINK BELOW FOR EXPLANATION

13. COLOURED FILTERS
FILTERS ONLY LET ONE LIGHT
THROUGH. ALL THE OTHER FILTERS
ARE ABSORBED BY THE FILTER-
THEY DON'T GET THROUGH

14. Plants and photosynthesis

15. Photosynthesis equation
carbon dioxide + water (+ light
energy) → glucose + oxygen

16. photosynthesis test for starch (leaf in light)
what you need:
leaf plant been in sun
beaker
bunsen burner
ethyl alcohol
tweezers

17. Method
1. heat a plant leaf in boiling water for 30 seconds (this stops its chemical
reactions)
2. heat it in boiling ethanol for a few minutes (this removes most of its colour)
3. wash with water and spread onto a white tile
4. add iodine solution from a dropping pipette
The starch should turn blue or black meaning starch is present in the leaf there
for collecting photosynthesis.

18. Chloroplast(plant cell)
This diagram is a plant cell number 7 is called chloroplast it
contains a green chemical chlorophyll which traps light for
photosynthesis. The chloroplast gives the green colour to
the leaf.

19. Diagram of a sliced leaf
a What are the names of the parts labelled A–G? Use these words to help you: air space,
chloroplast, cuticle, guard cell, palisade cell, spongy cell, stoma.
b Water vapour is lost from leaves. Arrow P shows water vapour leaving the cells. What is
the name of this process?
c Arrow Q shows the water vapour escaping from the leaf. What is the name of this
process?
2 a In which cells does most photosynthesis happen?
b How are these cells adapted to carry out photosynthesis?
c Where are these cells located in a leaf?
d Why do you think they are in this position?
3 Suggest a reason for each of these observations:
a Leaves have a large surface area.
b Leaves are thin.
c Leaves often grow in such a way that they do not shade one another.
d Stomata are shut at night.
4 a Name three types of substance that a plant makes using glucose.
b What is each type of substance used for?

20. Glucose

21. The eye

22. diagram of eye

23. THE EYE
Lens- transparent, biconvex, flexible disc behind the Iris attached by the suspensory ligaments to the ciliary muscles
The function of the lens it Focuses light on the retina
Retina- The lining of the back eye contain two types of photoreceptor cells-Rods- sensitive to dim light and black and white cones-
sensitive to colour a small area foven the middle of the retina has many more cells than photoreceptor cells
The function of the retina it contains the light receptors
The cornea- front part of the tough outer coat the sclera is convex and transparent
The function of the cornea is refract light bend it as it enters the eye
Optic nerve-Bundle of sensory neurones at the back of the eye
The function of the optic nerve is carries impulsive from the eyes to the Brain
The iris-Pigmented -The colour of your eyes- Silverlight cannot pass through. it's muscles contract and relax to the alter the size of a
pupil.
The function of the Iris is it control how much light enters the pupil ciliary
Muscles- muscles connected to the lens by suspensory ligaments
The function of the ciliary muscles is it is adjust shapes of the lens to make it more or less curved so as it increases or decreases
reflection of light
suspensory ligaments- connected to ciliary muscles through the lens and hold the lens in place the function of the suspensory
ligaments that it's slacken or stretched the ciliary muscles contract or relax to adjust the thickness and the Curvature of the lens

24. SOUND

25. bell jar experiment

26. FREQUENCY AND PITCH

27. Fuels and Energy

28. What do we mean by energy:
Here are 4 types of energy:
Chemical energy
Electrical energy
Heat & light energy
Nuclear energy

29. Non renewable and renewable energy sources
Examples of energies:
Renewable Non renewable
Wave energy oil
Tidal energy coal
Hydroelectric energy wood

30. What's the difference?
Non-renewable: Renewable:
Cannot be replaced Can be replaced
Will run out Will run out
Eg. coal Eg. solar energy

31. Carbon cycle (fuels and energy cont.)

32. Carbon Cycle

33. Global warming/climate change/Greenhouse effect
Global warming:the amount of co2 in the atmosphere increasing
Climate Change:It's the change of the atmosphere and the climate/weather
Greenhouse effect: It's when the atmosphere of the earth goes colder and it would
be below freezing level, furthermore the molecules would act like the gas.

34. What is Climate?
Long term average of a region's weather.
Average rainfall
Average hrs of sunshine
Average tempreature

35. Magnets

36. Magnetic Materials
The 3 magnetic metals are:
Iron
Nickel
Magnetic Non magnetic
Galvanised steel Soft aluminium
Zinc plate Cooper
Magnetic stainless steel Zinc
steel Bronze

37. Bar magnet lines of force
A bar magnet has got two poles;North and South.
The magnetic field of a magnet is strongest at the
poles because this is where the magnetic field
lines are close together.