Quarantine School - Resource Pack #305 Apr 2020 | Gurjot Sidhu | 4 min read | Tags: #self-learning #tips #quarantine-school
What a beautiful Sunday it is today. Good time to wonder how plants with red leaves make their food, why milk is sold in kilos, and how a mobile phone knows where you are!
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The learners are bored, the teachers are unavailable, and the parents are tired.
Chachi is here to help!
This beautiful Sunday morning brings you the third resource pack of the Quarantine School series. As promised, we have three new learning triggers for you today. These should ideally be used by parents or teachers as conversation starters with learners. Based on the learner’s interest or your intended learning objective, you can pick whichever trigger you like and facilitate a journey of exploration!
Use the links below to jump to individual sections –
- How do red leaves make their food?
- Why is milk sold in kilograms?
- How does your mobile phone know where you are?
How do red leaves make their food? #
If there’s one thing that I am sure you know about plants, it is that they make their food by a process known as photosynthesis. And the pigment essential for that process is known as chlorophyll. But chlorophyll is always green in colour.
How do plants with red leaves make their food then?!
We have three possibilities in front of us now –
- Plants with red leaves do not undergo photosynthesis. They make their food with some other process.
- Plants with red leaves contain chlorophyll but it is not green in colour.
- These plants do contain chlorophyll but they have some other pigments as well which overpower the green colour of chlorophyll.
Which one do you think is true? How will you find out the right answer? What questions will you ask? What is the best methodology to evaluate your hypothesis?
Why is milk sold in kilograms? #
Milk is a liquid, right? And liquids are measured in litres. But why is milk sometimes sold in kilograms then?!
This is a great opportunity to learn about the concept of density.
- But before we learn about density we should make sure we are familiar with the concepts of mass and volume. Here’s some hints –
- Mass of a quantity is the sum total of the mass of all atoms present in that quantity. It is measured in kilograms.
- Volume of a quantity is the amount of space it occupies. It is measured in cubic units (m³ or cm³). It is also measured in litres –
1 litre = 0.001 m³. With that information, can you find out what the volume of 5 litres of milk will be?
- Now, density is simply the mass of a quantity divided by its volume. The density of water is 1000 kg/m³. Try to find out what the density of milk is. Remember, Google is your friend!
- If we assume that the density of milk is roughly the same as that of water… what would be the mass of 1 litre of milk in kilograms? It’ll help if you write down density formula from Step 2 on a piece of paper.
Now find a packet of milk and read whether it mentions its quantity in kilograms or litres.
What do you make of this? :)
How does your mobile phone know where you are? #
Have you seen how a mobile phone can help you find the route from one place to another using maps? You just enter where you want to go and it automatically tells you how to get there. But how does the phone know where you are?!
- You have probably heard of “GPS”. But do you know what it stands for? Try to find out what the full form of GPS is.
- GPS works with the help of satellites in space. Can you find out how many satellites are needed for GPS to work?
- So when you open maps on your phone, your phone actually sends a message to one of the GPS satellites which then tells your location on the map to your phone.
Isn’t that amazing? A satellite so far away in space is actually responsible for taking you from your location to wherever you want to go!
If you are interested in learning more about this topic here are some questions for you to explore –
- Who made the GPS? Is it free for anyone to use? Can people misuse it? How can that be prevented?
- Is GPS the only way of finding your location? Are there other satellites that do this too?
- Do you know that India has recently launched its own GPS? It’s called NavIC. Find out more about it in this video.
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