Which is a living thing?
- A rolling stone.
- A bean plant.
- A toy car.
Answer and explanation
A bean plant.
A plant carries out life processes even though it does not walk.
Subjects
Cells & microscopy
Choose questions individually, practise online, or create a worksheet with matching answers. Counts include generated variants, not only authored originals.
Make a worksheet727 question instances
Sample exercises
Does a moving toy prove that all moving objects are alive?
- No.
- Yes.
- Only if it moves quickly.
Answer and explanation
No.
Movement can have a nonliving cause such as a motor.
Name two observations that could help describe a growing plant over time.
Answer and explanation
Its height increases and new leaves appear.
Accept relevant observable changes without claiming that one observation proves every life process.
A plant has 3 leaves, then grows 2 new leaves and loses none. How many leaves does it have?
Answer and explanation
5
Add the two new leaves to the three existing leaves: 3 + 2 = 5.
Why is a tree still living while standing in one place?
- It is secretly a rock.
- Only animals can be alive.
- Walking is not required for life.
Answer and explanation
Walking is not required for life.
Plants have growth, metabolism and other life processes.
Why should an unfamiliar berry not be tasted during a nature observation?
Answer and explanation
It may be harmful; observe without eating unknown plants.
A simple safety explanation is sufficient.
Study notes
Living things and careful observations
Use more than movement to decide whether something is alive.
Grades K–3Living things and careful observations · Revision sheet
Use more than movement to decide whether something is alive.
Grades K–3Cells and their components
Match structures to functions without implying every cell is identical.
Grades 5–8Cells and their components · Revision sheet
Match structures to functions without implying every cell is identical.
Grades 5–8Microscope scales and magnification
Distinguish a bigger image from a more detailed image.
Grades 7–10Microscope scales and magnification · Revision sheet
Distinguish a bigger image from a more detailed image.
Grades 7–10Diffusion, osmosis and active transport
Use gradients and membrane properties to choose the process.
Grades 8–11Diffusion, osmosis and active transport · Revision sheet
Use gradients and membrane properties to choose the process.
Grades 8–11Cell cycle and mitosis
Separate DNA replication from chromosome separation.
Grades 9–12Cell cycle and mitosis · Revision sheet
Separate DNA replication from chromosome separation.
Grades 9–12Actual size from an image
Magnification is image size divided by actual size. Convert millimetres to micrometres consistently.
Grades 7–11Surface-area to volume ratio
For a cube, surface area is 6a² and volume is a³. Their ratio decreases as side length increases.
Grades 8–11Percentage mass change
Use initial mass in the denominator. A negative percentage represents a decrease from the starting mass.
Grades 8–11Cells & microscopy · Formula reference
Formula reference
Grades 7–11