Warm Up - “Positive or Negative?” Many of the things that humans do in the world can greatly impact upon the environment. Think about each of the human actions below and join a line to either the word ‘positive’ or ‘negative’. One has been completed for you.
Positive
Negative
Ⓒ 2018 SAM Labs
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Mini-lesson
Keyword Review
Fill in the blanks with the appropriate keyword using the word bank below.
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Physical Water Scarcity
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Economic Water Scarcity
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Climate Change
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Deforestation
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Pollution
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Water wastage
There are two types of water scarcity - Physical Water Scarcity and Economic Water Scarcity. ________________________ occurs when there is not enough water to meet our needs. _____________________ occurs when access to water is limited for financial reasons (even though it is available for human needs). __________________, such as altered weather-patterns (including droughts or floods), _______________, increased ________________ and ________________________ can cause insufficient supply of water. All causes of water scarcity are related to human interference with the water cycle.
Let’s Discuss
In your workbook or with a partner, record, discuss, or share your ideas as to what we can do to help eradicate water shortage in certain areas of the world.
__________________________________________________________________________________________
Ⓒ 2018 SAM Labs
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Challenge 1
Your Plan: Think about the SAM system you need to create and use the space below to design your water dispenser model: Materials you will have available:
Light Sensor
Light
DC Motor
Wheel
Car base
Controller
Container
Yoghurt Pot
Lolly Sticks
Thick Card / Cardboard
Cellotape
Scissors
Rice
Blue Tack
Double Sided Tape
Ⓒ 2018 SAM Labs
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Remember that your water dispenser model must have 3 key parts to it: Part 1: The ‘water system’. This could represent a well, river, stream, estuary etc. Within this, there will be a Light Sensor, acting as the input for a system that will monitor how much water is present. Part 2: A ‘plug’. This will dispense the water from within the system once it gets too full. The ‘plug’ will be attached to a DC Motor so that it can be mechanically open and closed. Part 3: An ‘overflow’. This part of the model will collect the full water once it has be dispensed.
Sketch and label your design ideas below:
Ⓒ 2018 SAM Labs
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We can use transitional phrases to talk about the order events or actions that take place. Practice using transitional phrases when presenting your system.
Time & Sequence
Compare (+)
Contrast (-)
Cause and Effect
first/second/third
also
but
because
next
equally
however
so
after
likewise
otherwise
therefore
then
in addition
on one hand… ...on the other hand
as a result
finally/overall/ to sum up
similarly
opposite
due to
Ⓒ 2018 SAM Labs
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