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Intermediate 1 Unit 3a & b Photosynthesis, Respiration & Fertilisers 123 45 67 89 10 111213 14 15 22 23242526 16171819 2021 27
Name the carbohydrate produced by photosynthesis. Glucose
Name the process which produces glucose in green plants. Photosyntheis
Name the chemical in leaves which absorbs light.? Chlorophyll
Name the two substances absorbed by green plants during photosynthesis? Carbon dioxide and water
Name the process that animals can obtain energy by. Respiration
Name the products of respiration. Carbon dioxide and water
Name the gas produced during photosynthesis. Oxygen gas
Why do animals need energy? Warmth and movement
What are the two reactants in respiration? Glucose and oxygen
Name the gas which causes the greenhouse effect. Carbon dioxide
Give two reasons why the level of carbon dioxide in the atmosphere is increasing More fossil fuels burned. Clearing of forests.
What is global warming? The atmosphere retains more of the sun’s heat energy
Name the process which occurs when the atmosphere retains more of the sun’s heat energy? Global Warming
Global warming is caused by an increase in which gas? Carbon dioxide
What is the test for carbon dioxide gas? Turns limewater milky
What is a pesticide, fungicide and herbicide used for? Pesticide - kill pests/insects Herbicide - kill weeds Fungicide - prevent diseases
Suggest another way of controlling pests. Natural predators e.g birds eating caterpillars
Name the three essential elements needed for healthy plant growth Nitrogen, potassium and phosphorus
Why are fertilisers added to soil? To put essential elements back into the soil.
To be effective should fertilisers be soluble or insolube? Soluble
Some plants such as clover, beans and peas can convert nitrogen from the air into nitrates. Which part of the plant is able to do this? Root nodules
What can happen to the water in rivers and lochs when high levels of nitrates get into the water. The water becomes lifeless
The main artificial fertilisers include ammonium and nitrate compounds. Name the other two compounds used as fertiliser. Potassium compounds and phosphate compounds.
Give two examples of natural fertilisers? Manure and compost
Why has there been an increase in the use of artificial fertilisers? More food is needed for an increasing population.
What does the harvesting of crops prevent from happening? Essential elements being returned to the soil
How are the essential elements taken in by the plant? Through the roots as compounds
Intermediate 1 Unit 3a & b 123 4567 89 10 1213 14 15 22 232425 26 161718 19 2021 27 11
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