This Week at STEM: Science Week Block 2 2018/2019

This week we focused on science!

Our successful learner trait this week is:

To start the day, our instant challenge was a forensic challenge.  We learned the word forensic means using science to help solve crimes.  We were given a story and some evidence and had to find out who infected the chicken soup with Cholera.  It was really difficult.

Then we learned all about the body and body systems.  We learned the human body has cells; groups of cells that work together are called tissues.  Tissues combine together to make organs.  Organ work together to complete a task in an organ system.  We learned about the excretory or urinary system and why it is important for our body.

Then we learned some lab safety rules.  We learned you need to wear safety goggles, lab coats, gloves, closed toe shoes and wear long hair up.  We need these rules to help keep us safe.  We quickly looked at Workplace Hazardous Material Information System (WHMIS) symbols.

We went into the lab and performed a urinalysis.  We looked at the colour, clarity and odour in the first test.  We learned the colour of urine can show if a person is hydrated or not; dark yellow urine means a person is dehydrated.  After that, we tested the pH level using red litmus paper.  We learned we want a pH that is around 6; slightly acidic.  After pH, we compared the sediments in our urine samples before and after putting them in a centrifuge.  Then we did a test to see if there were proteins were present in our samples.  We compared the sediments in heated and unheated samples.  If there were more sediments in the heated sample, proteins were present.  We learned you do not want protein in your urine because protein is a macro-nutrient our body needs.  The last test we did was for glucose.  We put something called Benedict’s solution in our samples and heated them.  If they turned an orangey colour, glucose was present in the urine sample.  We learned you do not want glucose in your urine sample because our body uses glucose as a form of energy and glucose in a urine sample might mean the person has diabetes! We used a data sheet to help us keep track of our results.

Next week is Coding Week; we can’t wait to share all the exciting things we do!

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