A In your copy, go investigate.


1. What three things does a plant need for photosynthesis? 2. How does a plant take in carbon dioxide? 3. What does a plant produce in the process of photosynthesis? 4. Name the food energy that helps plants to grow. 5. Where do people get most of the energy to fuel our cars and homes? 6. Is this a good thing? Why/Why not?


B In your copy, give your opinion.


1. Why do you think plants store glucose instead of using it all up straight away? 2. Does the term ‘photosynthesis’ describe the process well? Why/Why not? 3. What do you think gives plants their green colour? 4. Would you prefer to get your energy through photosynthesis? Why/Why not? 5. Has learning about photosynthesis made you want to plant trees? Why? 6. What do you think is the most interesting or surprising part of photosynthesis?


C Vocabulary: cause and effect


Cause and effect is when one event causes another to happen. Tick the box that accurately describes the effects of each cause mentioned in the text. Cause


Effect


1. Humans breathe out carbon dioxide.


2. Leaves release oxygen.


3. Hydrogen and carbon dioxide combine.


ƒ Plants absorb the carbon dioxide. ƒ The sun absorbs the carbon dioxide.


ƒ The oxygen harms the environment. ƒ Humans and animals breathe in oxygen.


ƒ Glucose is formed. ƒ Humans and animals make food with this.


D Cloze procedure: ‘Energy’. Fill in the blanks. Millions of


Animals ate the plants, absorbing


ago, plants absorbed the sun’s energy through . When the


releases harmful gasses such as carbon fossil fuels bad for the only be used once.


can be used over and over and are not . and animals died,


they became buried and compressed in the earth. Humans now harness this energy in the form of oil, natural gas and


, all of which we call fossil fuels. Burning fossil into the atmosphere. Not only are


, they are also non-renewable, meaning they can sources of energy such as solar, hydro or wind energy to the environment.


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Unit 13 | Explanatory Text 2


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