1. Plants, photosynthesis and respiration
Name _____________________

2. Things needed for photosynthesis
SUNLIGHT
Gives the plant _________
The green chemical that _______ the light is called chlorophyll
_______ ________ gas comes from the air.
_________ travels up from the roots
Words: water, traps, energy, carbon dioxide

3. Things made by photosynthesis
Plants make the carbohydrate called ______________. This is important as a food for animals.
_________ gas goes into the air. This is important because animals need it for breathing.
Words: oxygen, glucose

4. Photosynthesis equations
Sunlight
Carbon dioxide + _____ glucose + _____
6CO H20 C6H12O O2
Chlorophyll
Sunlight
Chlorophyll
Plants store the GLUCOSE produced by photosynthesis by joining it together in a ____________ reaction to make ____________
Words –starch, water, oxygen, polymerisation

5. Respiration
Respiration is the opposite of photosynthesis. It is a reaction that makes _______ for living things by reacting glucose and oxygen.
________ comes from the food and _________ comes from the air.
_________ __________ gas and ________ are breathed back out.
Words: carbon dioxide, energy, water, oxygen, glucose

6. Gas Exchange
The amounts of gases we breathe in and breathe out are not the same.
Air breathed in
Air breathed out
0.03% 3%
21%
18%
79%
79%

7. Photosynthesis and Respiration
Glucose oxygen water carbon dioxide
Photosynthesis
Water carbon dioxide glucose oxygen

8. Global warming
It is important that the processes of photosynthesis and respiration are balanced to make sure the levels of oxygen and carbon dioxide in the air stay the _____. Too much carbon dioxide can cause _______ ________.
The amount of carbon dioxide in the air is getting higher because of two main reasons.
More trees are being _______ down so they do not absorb so much carbon dioxide.
We are burning more _______ ________ like petrol and this makes carbon dioxide.
Words: fossil fuels, cut, same, global warming

9. Using plants for food
Fruits and seeds
Roots
Leaves
Stems

10. Helping plants to grow
Farmers can use a number of chemicals to help plants to grow:
1) ____________
Provide nutrients The elements plants need are __________, ___________ and __________
NPK
3) _____________
Kill pests like greenfly
2) ____________
Kill weeds
4) _____________
Kill bacteria and prevents plant diseases.
Words: herbicides, potassium, pesticides, nitrogen, fungicides, fertilisers, phosphorus

11. disadvantages of pesticides
Pesticides are toxic chemicals so care needs to be taken when they are being used. They can also get into our food by being washed into rivers and streams and moving into the food chain.
Small plants
Kingfisher
Marine insects
Fish
Although the level of insecticides in the plants is small, it will build up through the food chain due to the number of organisms in each stage.

12. Food types Uses Found in Type
____________
Water
_____________
Uses
Found in
Type
Bread, potatoes, cereal
Energy
Cream, butter, milk, oil
Storing concentrated energy
Meat, fish, eggs
growing and repairing cells
Fruit and vegetables
Keep use healthy
Milk and cereals
Strong teeth and bones
Fruit + veg, + cereals
Keeps the gut moving
Water!
70% of the body is water
Words: fats, minerals, proteins, carbohydrates, vitamins, fibre

13. Testing for starch starch iodine iodine Iodine goes _________
Starch makes iodine go __________________
starch
Iodine goes _________
iodine
iodine

14. Testing for sugars sugar Heat up in warm water
Sugars makes warm benedict’s solution change from_________ to _______. The only sugar that doesn’t do this is _________.
sugar
Benedict’s solution
Benedict’s solution goes ________
Heat up in warm water

15. The digestive system
The whole point of digestion is to break up our food into small enough molecules that can get into our ________.
The main foods affected are
starch – this is broken up into _________
proteins - these are broken up into _______ ________
Words: amino acids, glucose, blood,

16. Enzymes Words: catalysts, proteins, starch, smaller
Enzymes are special _________ that are found in living things. They help break the food into ________ pieces which can then pass into the blood. There are various types of enzymes.
Amylase breaks _________ up into glucose:
Protease breaks _______ into amino acids:
Lipase breaks fats into fatty acids and glycerol:
Words: catalysts, proteins, starch, smaller