Plants

Science, Biology. Usually met in years 7 to 10.

Know the parts of a plant and what they do, and the equations for photosynthesis and respiration.

What you practise

Ends with xylem, phloem and why plants need minerals. Practice moves up a level when a round goes well and down when it does not.

Each sample comes with the method and the reason every wrong option is wrong. Real practice rounds are ten questions at your level.

Sample question, level 2 of 5

What is the job of the chlorophyll?

Show the answer and method

Answer: A, To absorb light for photosynthesis (it is the green pigment)

The method: The job of the chlorophyll is to absorb light for photosynthesis (it is the green pigment).

Why the other options are wrong:

B, To increase the surface area for absorbing water: That is the job of the root hair cells, not the chlorophyll.
C, To absorb water and minerals from the soil: That is the job of the root, not the chlorophyll.
D, To make pollen: That is the job of the anther, not the chlorophyll.
E, To attract insects for pollination: That is the job of the petal, not the chlorophyll.

Sample question, level 4 of 5

Which part of a plant has this job: to let gases in and out of the leaf?

Show the answer and method

Answer: D, stomata

The method: The job of the stomata is to let gases in and out of the leaf.

Why the other options are wrong:

A, flower: The flower has a different job: to make seeds, which is how the plant reproduces.
B, stem: The stem has a different job: to support the plant and carry water and food around it.
C, phloem: The phloem has a different job: to carry the sugars made in the leaves around the plant.
E, leaf: The leaf has a different job: to make food by photosynthesis.