Science at key stage 3 (Year 9)

Unit 9C: Plants and photosynthesis

Objectives

Section 1: a. How do plants grow?
Children should learn:

that green plants do not absorb 'food' from the soil
that green plants use carbon dioxide and water to produce biomass
the meaning of the terms 'photosynthesis' and 'biomass'
to represent photosynthesis by a word equation

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Section 2: b. How do plants grow?
Children should learn:

that light is needed for photosynthesis
that the raw materials for photosynthesis are taken from the environment around the plant
to interpret and draw conclusions from data

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Section 3: a. What is the role of the leaf in photosynthesis?
Children should learn:

to test for the presence of starch in a leaf
to heat flammable liquid safely
that chlorophyll and light are necessary for photosynthesis

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Section 4: b. What is the role of the leaf in photosynthesis?
Children should learn:

that oxygen is produced during photosynthesis
to decide how to measure the rate of photosynthesis
to control variables
to present results in tables and graphs, identifying anomalous results
about variation between leaves
that leaves are adapted to photosynthesise efficiently

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Section 5: c. What is the role of the leaf in photosynthesis?
Children should learn:

how leaf cells close to the upper surface are adapted for photosynthesis

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Section 6: Checking progress
Children should learn:

to relate ideas about plant growth to evidence about gas exchange and to the cellular structure of the leaf
how ideas about plant growth have changed

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Section 7: What happens to the glucose produced in leaves?
Children should learn:

that plants store starch
that new materials made from glucose produced during photosynthesis lead to an increase in biomass
that the glucose from photosynthesis provides energy for all living processes in the green plant
to identify what information is needed and use different texts as sources

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Section 8: What is the role of the root in photosynthesis?
Children should learn:

that roots are adapted to take in water and this is used in photosynthesis
that plants use water in many ways
that roots require oxygen for respiration
to make careful observations and record these in drawings
that plants need sources of nitrogen and other elements in the form of minerals
that mineral deficiency hinders plant growth

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Section 9: Why are green plants important in the environment?
Children should learn:

that photosynthesis removes carbon dioxide from the air and produces oxygen
to consider issues of environmental protection from several perspectives
to compare the word equations for respiration and photosynthesis

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Section 10: Reviewing work
Children should learn:

to relate ideas of photosynthesis to a particular organism

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Sections in this unit

This unit is divided into sections. Each section contains a sequence of activities with related objectives and outcomes. You can view this unit by moving through the sections or print/download the whole unit.


	1. a. How do plants grow?
	2. b. How do plants grow?
	3. a. What is the role of the leaf in photosynthesis?
	4. b. What is the role of the leaf in photosynthesis?
	5. c. What is the role of the leaf in photosynthesis?
	6. Checking progress
	7. What happens to the glucose produced in leaves?
	8. What is the role of the root in photosynthesis?
	9. Why are green plants important in the environment?
	10. Reviewing work