Unit 1 Plants - Extra Worksheets

Transcription

1 Unit 1 Plants - Extra Worksheets 1 Complete the sentences using the words in the box. Plants can make their own using light from the. They also need carbon gas and. 2 Label the parts of the diagram to show photosynthesis. dioxide energy food Sun water a b d x gas from the air goes into the leaf. i t energy from the Sun. C p y absorbs light energy. Food is made in the leaf by photosynthesis Glucose is turned to s. W t from the soil goes up the stem and into the e a O e gas comes out of the leaf. 3 Complete the word equation below. c b g + t + i d e e g l s + o e

2 1 Complete these sentences using words from the box. Every living cell in a plant needs n to help the plant r and to make substances. Plants use m energy stored in c. The energy is released by a respiration. aerobic chemical energy glucose grow new 2 When does photosynthesis happen? 3 When does respiration happen? 4 When does a plant make more oxygen than it uses up? 5 When does a plant use up oxygen? 6 Who uses oxygen produced by photosynthesis for respiration? A plants only B animals only C plants and animals Leafy Adaptations

3 Name Class 1 Label the diagram using words from the box. You will need to use some words more than once. epidermis palisade phloem xylem Match up 2 What S are small holes in a leaf? 3 What GC are the cells that open and close the holes? 4 What C is the green substance that absorbs light energy? 5 What P is the name for the cells where most photosynthesis happens? 6 What C do palisade cells contain to help them to photosynthesise. 7 What D is the name for the way carbon dioxide gets into a leaf? 8 What T are leaves so the carbon dioxide doesn t have to travel far? 9 What S is the type of place where plants with big leaves grow. thin chloroplasts diffusion stomata palisade guard cells chlorophyll shady

4 Sugary food 1 The new material that an organism makes is called biomass. Glucose is made by photosynthesis. It is used for: making other making new materials for r s t e p i r o n a i s s a u s n b c e t g o t r w h r s i a i u s a c s g o t Glucose is used to make c l l e, f s, p t s and s r h. 2 Match up Starch is used as cell walls. Cellulose is used for stored food. Fats are used for growth. Proteins are used for cell membranes. 3 Seeds have a store of starch and fats to use when they a) move b) grow Tick the correct answer

5 The roots of the matter 1 Match up Plants need water from the soil for help them to absorb water quickly The roots of plants are spread out to mineral salts Root hair cells have a large surface area to absorb water from the soil Water travels up the plant in phloem tubes The water absorbed from the soil contains wilt If a plant does not have enough water it will start to photosynthesis Glucose is transported around the plant in xylem tubes. 2 Which P are needed for cell membranes and for healthy root growth? 3 Which P is needed to help enzymes in photosynthesis and respiration? 4 Which N are needed to make proteins? potassium nitrates phosphates

6 A changing atmosphere 1 When the Earth was first formed its t s r was mainly dioxide. The carbon dioxide was produced by v n. There was hardly any x g. When g evolved, they used photosynthesis to turn carbon d d into oxygen. Today the atmosphere is about nitrogen and oxygen. Animals and plants produce carbon dioxide in r p t. Plants take in carbon dioxide in photosynthesis, and keep the atmosphere in l c. Most h s t happens in forests. 20% 80% algae atmosphere balance carbon dioxide oxygen photosynthesis respiration volcanoes 2 a What CD is a gas made by burning fossil fuels? b What M is a gas made by cows digestive systems? c What GG are gases which can trap heat? d What GW means the Earth may be getting hotter? e What F is where most photosynthesis happens?