1 March 2006Download 2.3_2.0b Science Knowledge: Science 2: Life Processes and living things K2.3 Green plants and organisms Download K2.3_2.0b This document can be freely copied and amended if used for educational purposes. It must not be used for commercial gain. The author(s) and web source must be acknowledged whether used as it stands or whether adapted in any way. Authored by Keith Ross, University of Gloucestershire. accessed from date created March 2006

Life & Living Processes Plants and other green organisms Elicitation questions and some background ideas

3 March 2006Download 2.3_2.0b Staying Alive … Elicitation question ~ two tubs Where has the extra ‘stuff’ come from? Only rain water is added to the growing tree over 5 years. There is the same amount of soil as there was, but the tree has grown big.

4 March 2006Download 2.3_2.0b Foundation Stage Knowledge & understanding of the world: Find out about & identity some features of living things

5 March 2006Download 2.3_2.0b Key Stage One Plants are alive! Plants need light and water to grow Recognise and name parts of plant Life Cycle of plants

6 March 2006Download 2.3_2.0b Key Stage Two Effect of light, air, water and temperature Parts of the Plant ~ functions: Leaf; Root; Stem; Flower Life cycle ~ various stages

7 March 2006Download 2.3_2.0b Key Stage Three and four Photosynthesis Transport in plants Germination and growth Ecology

8 March 2006Download 2.3_2.0b What is a Plant? Leaf; Root; Stem; Flower Transport Support Food production Reproduction Water and minerals Match the part(s) of the plant with the functions

9 March 2006Download 2.3_2.0b How plants work Germination and growth – materials and energy (seed and cells) Photosynthesis – production of food and oxygen (leaves) Growth and transport (stem and roots) Reproduction and life cycle (flowers)

10 March 2006Download 2.3_2.0b Plants & energy Click two of the following, which are sources of ENERGY for a plant to grow Carbon dioxide and water 38% Minerals taken up from the soil 40% Sunlight through photosynthesis 90% Glucose and oxygen through respiration 26% %ages are for a group of 100 trainee primary teachers on entry to ITE, having obtained a ‘C’ or better at GCSE, usually two or three years previously.

11 March 2006Download 2.3_2.0b Photosynthesis The next three slides provide a rather different holistic view of photosynthesis. Emphasis is on the role of oxygen, released during photosynthesis and used during respiration. We focus too much on the role of biomass (the fuel) in carrying energy – it is the system, the fuel/oxygen system that stores the energy.

12 March 2006Download 2.3_2.0b Diagram to show that on this planet, whilst energy is degraded matter is cycled

13 March 2006Download 2.3_2.0b

14 March 2006Download 2.3_2.0b An Ecosystem? PhotosynthesisRespiration Oxygen in Fuel lineOxygen out

15 March 2006Download 2.3_2.0b Respiring plants? When do living plants respire? At night only 20% Never 6% All the time 60% In the daytime only 11%

16 March 2006Download 2.3_2.0b Plants and germination Click any of the following substances that a germinating seed requires? Soil 55% Water 94% Light 70% Oxygen 32% Carbon dioxide 54%

17 March 2006Download 2.3_2.0b Energy for germination Which of these is the direct source of energy used by a seed as it germinates? Carbon dioxide and water 31% Light from the sun 53% Respiration of carbohydrate in the seed 12%

18 March 2006Download 2.3_2.0b Germination This time-lapse video was made by Colin Forster of the University of Gloucestershire using the Blue computer-linked microscope given to all primary schools. Click screen to start video Video by Colin Forster

19 March 2006Download 2.3_2.0b Plants & Fertiliser Many farmers add nitrogen- based fertiliser to their soil. Click up to 3 of the following to show what could happen to the nitrogen. It could....

20 March 2006Download 2.3_2.0b Plants & Fertiliser Nitrogen could …. … be taken up by the plant and become part of the plant 80% … return to the atmosphere during photosynthesis 55% … return to the atmosphere by bacterial action 35% … dissolve in rainwater and leech into nearby streams 77%

21 March 2006Download 2.3_2.0b Transport in plants Water, minerals and oxygen (air) in soil Carbon dioxide and oxygen in air Fuel and materials from leaves to roots? Oxygen to roots?.. to other cells? Minerals and water from roots to leaves phloem and xylem

22 March 2006Download 2.3_2.0b How the mangrove tree gets air to its roots. The Mangrove tree. Water logged roots obtain their oxygen by putting up these snorkels – vertical tubes giving the flooded roots access to air

23 March 2006Download 2.3_2.0b Staying alive … Transpiration ~ give me water!

24 March 2006Download 2.3_2.0b Let’s talk babies … Why do daffodils produce flowers? Why do apple trees produce apples? How and why do flowering plants produce seeds? How do seeds travel to new places? What is the difference between germination and growth?

25 March 2006Download 2.3_2.0b Let’s talk babies ctd…

26 March 2006Download 2.3_2.0b Staying Alive … Adaptations

27 March 2006Download 2.3_2.0b fruit, nut, seed or vegetable? Meaning for (a) shopper (b) scientist? tomato peanut corn-on-the-cob runner-bean apple cucumber cabbage black-pepper rhubarb

28 March 2006Download 2.3_2.0b Fruit or Vegetable?

29 March 2006Download 2.3_2.0b Before you complicate things with too much detail, make sure your pupils understand how plants work: Why do they spread their leaves?.. and their roots?