Growing plants S3 Science

Learning objectives Describe different ways of growing plants Explain how strawberry plants use runners Outline how cuttings can be taken to grow new plants Draw a germinating seed Through investigation, determine the things needed for seeds to germinate

Strawberries

Strawberry runners Strawberry plants grown from runners have exactly the same _________ as each other and the parent plant. They are all __________ of the parent plant.

Cuttings

Testing rooting powder Research question: Does rooting powder help cuttings to grow?

Rooting Powder Step 1: Cut off a section of stem. Step 2: Remove the lower leaves. Step 3: insert the cut end of the stem in rooting powder (Front bench only) Step 4: Place compost in a pot. Break it up and wet it. Push your finger into the compost to make a hole. Place the cutting in the hole and pack the compost around the stem. Step 5: Place in a plastic bag. Step 6: After one week, carefully remove the cuttings. count the number of roots and measure their average length.

Results – with rooting powder Student Number Mean length Mean

Results – without rooting powder Student Number Mean length Mean

Presenting data Draw two bar charts mean length of roots (mm) number of roots mean length of roots (mm)

Conclusion Answer the research question

Seed structure

Light Air Warmth Water Soil Oxygen Germination Draw a germinating seed Label the roots, shoots and seed Which things do you think that a seed needs to germinate? Choose the best four answers from the list. Light Air Warmth Water Soil Oxygen

Where to plant seeds Your problem is to advise a government about the best place to plant a new crop:

Method Will the crop grow best in: Sandy desert, large plain, salty marsh or cold mountains? Your seeds will be grown on filter paper within a Petri dish. Draw the four Petri dishes and label the contents. State where the dishes will be placed e.g. on a heater, window or fridge. Design a simple results table Think about how you will present your results.

Results Place Number of germinated seeds Warm wet plain Hot sandy desert Cold mountains Salty marsh

Instructions The purpose of this quiz is that you realise how much you have learnt! Each group is to keep the scores of all three teams: Green Red and Blue Answers are to be presented on the “Show Me!” boards. The correct answer will be given after each question.

Q1 Strawberry plants can produce more strawberry plants by using: Walkers Joggers Runners Sprinters

Q1 C. Runners

Q2 State the term used to describe genetically identical plants or animals

Q2 Clones

Why are most of the leaves removed from a cutting? Q3 Why are most of the leaves removed from a cutting?

Q3 Reduce water loss

State the active ingredient in rooting powder Q4 State the active ingredient in rooting powder

Q4 Plant hormone or auxin

Q5 Name part C

Q1 Embryo

List three things needed for a seed to germinate Q6 List three things needed for a seed to germinate

Q6 oxygen water warmth

Q7 In which tube will the seeds germinate best?

Q7 A