This term’s challenge is related to our science learning! Please pick one of the tasks below:
Reading comprehension
Blind Creation Challenge
You will need to follow the instructions carefully… The outcome will be a model that relates to our circulatory system learning! Lets see how great your reading skills are.
You will need:
3 x Pop bottles (the same size) with caps, labels removed.
4 x Bendy straws
3 Cups of water
Food colouring
Tape
Modeling clay or play dough
Method
You will need 2 bottle caps for this experiment. Keep the third one as a back up. In the first cap create two holes that are the same size. You want the holes to be just big enough for the straws to slide through. In the second cap drill one hole that is straw sized. The second should be smaller. If you create both straw sized (like we did), you can use some modeling clay to make the second hole a little smaller.
In a jug, mix your water and food colouring to create your “red blood”. The exact amount of water is not important.
Take two straws, stretch and bend them to create a 90 degree angle. Slide one straw into the other straw (pinch one to make it smaller so it slides in), then tape up the join. Repeat with the second set of straws.
Place your three bottles on the table. Fill the first two with your water to about 80% full. Leave the third one empty.
On the first bottle place the cap with one straw hole and one small hole. On the middle bottle place the cap with two straw holes. Leave the third bottle without a cap.
Carefully slide the straws through the bottle caps. Place clay or play dough around the straw bases on the middle bottle to make an airtight seal with the bottle cap. You are now ready to put your model to work!
Making your model work
In this simple model the first bottle is the atrium of the heart, the second bottle is the ventricle, and the third bottle represents either the lungs or body. Our fingers function as the valves of the heart.
To make your heart model work, squeeze the middle bottle only. Start by pinching the straw between the atrium and ventricle bottle. Squeeze the middle bottle and watch your “blood” squirt out into the body.
Keeping the middle bottle “squeezed” move your fingers and pinch the straw between the ventricle and body. Now release the middle bottle and watch your blood move from the atrium into the ventricle.
Repeat, repeat, repeat to pump blood from the atrium, into the ventricle then out to the body!
Once your blood in the atrium gets too low, you can take blood from the “body” and add it back into the atrium. Then start again.
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