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Unit 4 of 7

Community Level Systems

OCR Gateway GCSE Combined Science A J250 — Biology · 6 lessons · 2 quizzes

Start the first lesson

4.1

Unit 4 overview: Community Level Systems20 min

4.1.1

The Cycling of Materials20 min

4.1.2

The Carbon Cycle20 min

4.1.3

Levels of Organisation in an Ecosystem20 min

4.1.4

Abiotic and Biotic Factors20 min

4.1.5

Interdependence and Competition20 min

Practice for this unit

4.1.1 The Cycling of Materials - MCQ practice (21 questions)

Marked questions with instant feedback and a full review.

4.1.2 The Carbon Cycle - MCQ practice (20 questions)

Marked questions with instant feedback and a full review.