Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Everything in our world is classified into two main groups: Living things and Non-living things.
Living things require food, water, and air to survive. For example, humans breathe oxygen () and release carbon dioxide ().
Living things show growth over time. A small seed grows into a big plant, represented by an increase in height and mass .
Living things can move on their own. While animals move from place to place, plants show movement towards sunlight ().
Living things reproduce, meaning they produce young ones of their own kind to continue their species.
Non-living things do not breathe, eat, grow, or reproduce. These can be 'Natural' (like the , , or ) or 'Man-made' (like , , or ).
📐Formulae
💡Examples
Problem 1:
If a puppy weighs and after one year it weighs , calculate the growth in weight and identify if it is a living thing.
Solution:
Explanation:
Since the puppy shows an increase in mass () and size over time, it exhibits growth. Growth is a primary characteristic of living things; therefore, the puppy is a living thing.
Problem 2:
A car moves from Point A to Point B. Does this make the car a living thing?
Solution:
Explanation:
No, a car is a non-living thing. Although it moves, it does not move on its own; it requires a driver and fuel. Furthermore, it does not breathe, grow, or reproduce.
Problem 3:
Classify the following into Natural and Man-made non-living things: Mountains, Chair, Water, Pencil.
Solution:
Natural: ; Man-made:
Explanation:
Natural things are found in nature and not made by humans. Man-made things are created by human effort using various materials.