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Topic 1: Photosynthesis & Respiration

Platinum Natural Sciences Learner's Book Page 1 - 14

CORE CONTENT:

Photosynthesis

• interactions and interdependence in an ecosystem are driven by the need for energy to sustain life

• the Sun is the important source providing this energy in the form of light and heat

• plants use carbon dioxide (from the air), water (from the soil) and energy from the Sun in a series of chemical reactions to produce glucose (food). This process is called photosynthesis

• oxygen gas is released into the air as a by-product plants change glucose into starch, cellulose and other chemical compounds to enable processes such as growth and reproduction

WORD EQUATION FOR PHOTOSYNTHESIS

Respiration

• food contains energy (potential energy). This energy can be released from food by a series of chemical reactions. This process is called respiration

• respiration (in all living organisms) is the process by which energy is released from food in a series of chemical reactions

WORD EQUATION FOR RESPIRATION

Photosynthesis song

Photosynthesis & respiration song

Complete in workbook:

Summarise core content on pages 1 - 14
Activities to be completed:
Act. 1 Revise knowledge of living things (page 1)
Act. 2 Write about the requirements for, and the products of, photosynthesis (page 5)
Skills focus: Variables and fair tests (page 6)
Skills focus: Carry out practical investigations (page 7)
Act. 4 Practice conducting an investigation (page 8-10)
Act. 5 Write about the requirements for, and products of, respiration (page 12)
Act. 6 Test for the presence of carbon dioxide in exhaled air (page 13)
Act. 7 Test if carbon dioxide is released by germinating seeds (page 13)
Complete Topic 1 Revision (page 14)