Factors affecting growth 1 – Empiribox


Lesson: Factors affecting growth 1

In this lesson we are going to explore all the elements that a plant needs to grow. We will learn the word equation for photosynthesis and older children may choose to learn the chemical equation too. In our investigation we will investigate what happens if one of the components needed in photosynthesis is changed. Your teacher will tell you which scientific skill, either Planning or Presenting and analysing data or Evaluation, to focus on during this lesson.


Before you start

Print out the worksheet that is in the Resources section or alternatively download it to your computer to fill in digitally.


You will need the following items for the practical investigation in this lesson :

a ruler, some celery, blue food colouring, 4 glasses, a plate or a chopping board, a scissors, water, a vase and some white flowers.

When you’re ready

Watch the video and carry out the work, including the investigation, as prompted by the scientist on the screen. Have fun!


Below is the list of key words you will come across during the course of the lesson:

Carbon dioxide










Plants need soil to germinate:

Which of the following do plants not get from the soil?

You cannot feed plants:

Which of the following does the plant not need to grow?

Which of the following is a solution for a plant that grows in low nutrient soil?

Why do plants need room to grow?

Water is the only liquid that can make plants grow:

Which of the following is the process of the plant making food for its growth?

Sara grew 4 plants and measured the height of their stems after 20 days. Which grew in the dark?

Toby grew 4 plants and to 1 he gave plant food and measured their height. Which of these was the one that was fed?

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