Natural Sciences and Technology

Mrs Arlene Kagan
Mrs Arlene Kagan - Grade 4A

Let us sacrifice our today so that our children can have a better tomorrow.

A. P. J. Abdul Kalam
 

Mrs Z. Patel
Ms Zaakira Patel - Grade 4B

Education promotes equality and lifts people out of poverty. It teaches children how to become good citizens. Education is not just for a privileged few, it is for everyone. It is a fundamental human right. Ban Ki-moon
 

Monday, March 7, 2016 - 10:29

Learners investigate to see if yeast needs warmth to grow. Sugar and warm water (37 degrees Celsius) are food for yeast. Yeast is alive. The dry yeast that you find in packets, and jars is still "alive". But it's "Inactive" (basically "suspended animation") If the water used to reactivate it is too cold it won't thrive... Just like hyporthermia affects humans in a negative fashion, so does yeast in cold water. You can effectively kill it by using very cold water. But most tap water won't kill it... But will keep it "inactive".