Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Living things are organisms that display characteristics such as growth, movement, breathing, and reproduction. Examples include plants, animals, and humans.
Non-living things do not grow, breathe, eat, or reproduce. They are further classified into Natural and Man-made things.
Natural things are found in nature and are not created by humans. These can be living (like a tree) or non-living (like the Sun, in rivers, or rocks).
Man-made things are created by humans using natural materials. Examples include wooden chairs, plastic bottles, and cars.
Living things require (Oxygen) for breathing and release (Carbon Dioxide) as a byproduct of respiration.
Green plants are living things that produce their own food using , , and sunlight through a process called photosynthesis.
📐Formulae
💡Examples
Problem 1:
Identify whether a 'Cloud' is a living thing, a natural non-living thing, or a man-made thing, and explain why.
Solution:
A cloud is a Natural Non-living thing.
Explanation:
Even though a cloud moves and grows in size, it does not breathe , does not need food, and cannot reproduce. Since it is found in nature and not made by humans, it is a natural non-living thing.
Problem 2:
A car moves and consumes fuel (food). Why is it not considered a living thing?
Solution:
A car is a Man-made Non-living thing.
Explanation:
A car moves only when operated by a human. It does not grow on its own, it does not breathe, and it cannot produce 'baby cars' (reproduction). It is manufactured by humans in factories.
Problem 3:
Name the gas that living things usually take in during breathing.
Solution:
The gas is Oxygen, represented as .
Explanation:
Most living things require to break down food and produce energy for their survival.