Ola Portugal

1
Ola Portugal

• Coleman Primary School
• invite you to share their
• Science Investigations

2
We love practical Science! Do You?

• We are studying
• yeast at the moment and wondered what conditions
  would affect the growth of our yeast.

3
This is what we used.

• Fresh yeast
• Dried Yeast
• Sugar
• Cold, warm and very hot water
• A teaspoon
• Plastic beakers
• A balloon
• A plastic bottle

4
We were asked some questions?

• What do you need to activate yeast?
• Can you blow a balloon up using yeast?
• Is fresh yeast better than dried yeast?

• How would you investigate this?
• We talked to our friends about how we could test
  this.
• It had to be a fair test!

5
This is what we did.

• We wanted to see if sugar affected the growth of
  yeast.
• We wanted to see if the temperature of the water
  mattered too.

6
Do you make predictions?

• We thought carefully about what we thought would
  happen in each situation and made our
  predictions.
• When we make predictions we try to say why we
  have made them based on what we know already. We
  dont just guess!

7
We like this bit!We set up the different
conditions and observe closely.

• Top Row
• yeast and sugar
• yeast and no sugar
• Middle Row
• yeast, sugar and cold water
• yeast and cold water
• Bottom Row
• Yeast and warm water
• Yeast, sugar and warm water

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Conclusion

• We have to say which we thought was best and why
  we thought that was.
• What do you think?
• We will try to answer your questions when we see
  you next week.

9
Can you blow a balloon up using yeast?

• We had great fun carrying out this investigation!
• We put fresh yeast in a bottle and added sugar
  and warm water.

10
Dont shake it!

• But Mrs Jenner, our teacher did!
• What do you think happened?
• Why do you think this was?

11
The balloon inflated!We had to make sure they
did not explode as yeast is quite smelly!
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See you next week

• Adeus Portugal!
• We are looking forward to answering your
  questions next week.
• Ate a proxima