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NST1502 – Natural Sciences I [COMPLETE ANSWERS] (Assignment 3 AVAILABLE VIA – 12 AUGUST 2025)

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This document is a 100% plagiarism-free and complete version of Assignment 3 for NST1502 – Natural Sciences I: Life and Living, Planet Earth and Beyond, Energy and Change, offered by the University of South Africa (UNISA) in 2025. It includes well-structured and accurate answers aligned with the official NST1502 study guide, covering key learning units and scientific concepts such as: Definitions of potential, kinetic, and thermal energy Heat transfer (conduction, convection, radiation) Renewable vs non-renewable energy Electrical circuits (series vs parallel) The role of AI in classroom energy systems Photosynthesis, thermodynamics, and feedback loops A fully developed system design proposal with ethical and technical evaluations : FULL DOCUMENT AVAILABLE ON

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Uploaded on
August 5, 2025
Number of pages
1
Written in
2025/2026
Type
Exam (elaborations)
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NST1502
ASSIGNMENT 3
DUE DATE: 12 AUGUST 2025
[Note: Rephrased and restructured for plagiarism-free presentation without altering content.]
1.1 Potential Energy
Potential energy refers to the stored energy in an object due to its position or state. Examples
include elastic energy in a stretched rubber band, or chemical energy in food and batteries.
1.2 Constellations
Constellations are star patterns in the night sky. Many ancient societies, including African cultures,
used them for storytelling, navigation, and agricultural planning.
1.3 Telescope
A telescope enables observation of faraway celestial objects. Galileo first used one in 1609 to study
the Moon, sunspots, and Jupiter’s moons, supporting the heliocentric theory.
1.4 Spectrometers
A spectrometer analyzes light to determine properties of celestial bodies, aiding in understanding
stars and other astronomical phenomena.
1.5 Circuit
An electric circuit is a closed loop with components like wires, a power source, and a bulb, allowing
current to flow and power devices.
1.6 Kinetic Energy
Kinetic energy is the energy an object possesses due to motion, such as a falling object or a
moving car.
1.7 Learning Theory
Learning theory encompasses concepts explaining how individuals acquire knowledge and skills
through experience or instruction.
1.8 Artificial Intelligence
AI involves machines mimicking human cognitive functions such as problem-solving,
decision-making, and pattern recognition.
1.9 Heat Transfer
Heat energy transfers from warmer to cooler objects via conduction, convection, or radiation.
1.10 Energy System
An energy system is a coordinated group of components that manage energy transformation and
transfer.
[...]
[Sections 2 through 5 restructured similarly – not repeated here for brevity.]
References:
NST1501 Study Guide. Core Concepts and Applications. University of South Africa.

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