Natural Sciences Grade 9-B
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Description
Contents
Reviews
Language
Unknown
ISBN
6635890033
SB 103_Siyavula NEW Gr9B cover ENG DBE
Gr 9_B_learner_DBE_eng
Energy and Change
Forces
Types of forces
Contact forces
Field (non-contact) forces
The Earth as a system
Spheres of the Earth
Electric cells as energy systems
Electric cells
Resistance
What is resistance?
Uses of resistors
Factors that affect resistors
Series and parallel circuits
Series circuits
Parallel circuits
Safety with electricity
Safety practices
Illegal connections
Energy and the national electricity grid
Electricity generation
Nuclear power in South Africa
National electricity grid
Cost of electrical energy
What is electrical power?
The cost of energy consumption
Planet Earth and Beyond
The lithosphere
What is the lithosphere?
The rock cycle
Mining of mineral resources
Exploration: Finding minerals
Extracting ores
Crushing and milling
Separating minerals from waste
Refining minerals
Mining in South Africa
The atmosphere
What is the atmosphere?
The troposphere
The stratosphere
The mesosphere
The thermosphere
The greenhouse effect
Birth, life and death of a star
The birth of a star
Life of a star
Death of a star
Image Attribution
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