Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Plants are living things that require specific conditions to grow and stay healthy: light, water (), air (), and warmth.
Light: Plants use sunlight as energy to make their own food through a process called photosynthesis.
Water (): It is essential for transporting nutrients from the soil and keeping the plant's structure firm (turgid).
Air: Plants breathe in Carbon Dioxide () from the air to create energy and release Oxygen ().
Warmth: Temperature affects how fast a plant grows; most plants prefer a range of to .
Nutrients: Plants absorb minerals like Nitrogen (), Phosphorus (), and Potassium () from the soil to stay healthy.
📐Formulae
💡Examples
Problem 1:
A student measures a sunflower plant on Monday. Its height is . On Friday, the height is . Calculate the growth ().
Solution:
Explanation:
The change in height represents the growth of the plant over the 4-day period.
Problem 2:
If a plant is kept in a dark cupboard but given plenty of , why will it eventually turn yellow and die?
Solution:
The plant lacks light energy.
Explanation:
Without light, the plant cannot perform photosynthesis to create glucose (food). The yellowing (chlorosis) happens because it cannot produce chlorophyll without light.
Problem 3:
Identify the gas a plant takes in from the air to make food.
Solution:
Carbon Dioxide ()
Explanation:
Plants absorb through tiny holes in their leaves called stomata to use in the photosynthesis process.