1. Plants and photosynthesis Green and growing Photosynthesis is a process in which_________ energy is used to make_____________

2. Plants and photosynthesis The site of photosynthesis is in the _______ Chloroplast contain the pigment________ Chlorophyll absorbs colors of light and reflects only_____, this why leaves are _______ WORD LIST: chlorophyll chloroplast,green

3. photosynthesis WORD LIST carbon dioxide water sunlight oxygen glucose Plants and photosynthesis

4. carbon dioxide from the air water from soil photosynthesis oxygen glucose some oxygen and glucose used in respiration fats and oils for storage

5. Photosynthesis light energy taken in water+sugar+

6. How fast does a plant photosynthesise? This question is very important to farmers and growers. We can use this apparatus to measure the rate of photosynthesis. How? We might count the oxygen bubbles per minute, or collect the gas given off in one minute and measure its volume. What would happen if we increased the light level? light source oxygen collects test tube water pondweed (Elodea) beaker funnel

7. Here are some results from the pondweed experiment. What effect does light have on the rate of photosynthesis? light levelbubbles of oxygen per minute very high24 high22 medium15 low 7 very low 0 ________________________

8. Without light energy, the reactions of photosynthesis cannot work. TRUE! 1. Photosynthesis only happens in the light.2. Plants make food from oxygen and sunlight.3. Photosynthesis and respiration work in opposite directions. 4. Plants look green because they contain the chemical chlorophyll. 5. Roots carry out half the photosynthesis that takes place in a healthy oak tree. 6. Plants give out carbon dioxide when they are photosynthesising. True or false? They take in carbon dioxide. Oxygen is produced by photosynthesis. FALSE! Photosynthesis produces glucose and oxygen, while respiration breaks them down to make carbon dioxide and water. TRUE! Chlorophyll absorbs all the colours in light except green – we see the green light because it is reflected from the plant. TRUE! They are vital to the plant but roots cannot carry out photosynthesis – they’re underground in the dark. FALSE! Plants need carbon dioxide from the air and water from the soil to build sugars. Oxygen is produced in photosynthesis. FALSE!

9. WATER CYCLE How do plants contribute to the water cycle ? ___________________________

10. NITROGEN CYCLE How do plants contribute to the Nitrogen cycle ? _________________________

11. How do plants contribute to the carbon cycle ? _______________________ CARBON CYCLE