- Define and explain Sorting Animals in your own words
- Use key terms such as organism accurately
- Apply what you have learned to new examples and questions
- Avoid the common mistakes learners make with this topic
This lesson focuses on Sorting Animals: group animals by their features into mammals, birds, fish, reptiles, amphibians and minibeasts.
Group animals by their features into mammals, birds, fish, reptiles, amphibians and minibeasts.
Key ideas
The seven life processes
Scientists remember the seven life processes with MRS GREN: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion and Nutrition. Every living thing carries out all seven. A car moves but does not grow or reproduce, so it is not alive; a mushroom grows, respires and reproduces, so it is.
Habitats and adaptation
A habitat is an organism's home. A pond, a woodland and a garden wall are all habitats. Living things suit their habitats: a frog's moist skin helps it live near water, while a cactus stores water to survive in a desert. When a habitat changes, the organisms living there must cope or move.
Key term — organism: A single living thing, such as a daisy, a sparrow or a person.
Sort a flame, a mushroom, a wooden chair and a puppy into three groups: alive now, once alive, or never alive.
Check each one against the seven life processes (MRS GREN). The puppy moves, breathes, senses, grows, and will one day reproduce, so it is alive. The mushroom grows, respires and reproduces using spores, so it is alive too. The wooden chair came from a tree, which was alive, but the chair itself carries out none of the life processes. The flame moves and seems to grow, but it does not sense, excrete or reproduce like a living thing.
Answer: Alive now: puppy and mushroom. Once alive: wooden chair. Never alive: flame.
- Drawing food chain arrows backwards Arrows point from the food to the animal eating it (grass → rabbit → fox), because they show where the energy is going.
- Calling anything that moves alive Wind, flames and cars move but carry out none of the other life processes. Movement alone does not make something alive.
Practice
The fish is alive because it carries out all seven life processes. The fishing rod was never alive and carries out none of them.
Example: a garden pond is a habitat for frogs, which need the water to keep their skin moist and to lay their eggs.
Any three of: movement, respiration, sensitivity, growth, reproduction, excretion, nutrition.
Yes. A mushroom grows, respires to release energy, and reproduces by releasing spores, so it carries out the life processes.
Quick check
Which of these best defines "organism"?
Why is a bicycle not alive?
In the food chain grass → rabbit → fox, which is the producer and why?
- Sorting Animals: group animals by their features into mammals, birds, fish, reptiles, amphibians and minibeasts.
- The seven life processes: Scientists remember the seven life processes with MRS GREN: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion and Nutrition.
- habitat: The place where an organism lives, providing the food, water, shelter and space it needs to survive.
- Watch out for: drawing food chain arrows backwards