big idea: man and his environment man can interact with his environment. man can manipulate his...
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Big Idea: Man and his Environment
• Man can interact with his environment.
• Man can manipulate his environment.
• Man is affected by the environment around us.
• Environment affects and determines how Man works.
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Essential/Guiding Questions(use these questions to guide you in your learning of this topic)
• How does Man interact with his environment?
• Why Man manipulates his environment?
• How is Man affected by his environment?
• How does the interrelationship between Man and his environment benefit mankind?
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What Is a Force?• A force is a push or a pull.
• A push is a force that is applied on an object that causes it to move in a direction away from our body. (eg we push a trolley, push a door open)
• A pull is a force that is applied towards our body. (eg pull a piece of tissue paper from a box, drag the school bag on the floor)
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What Is a Force?
• A combination of a push or a pull produces actions such as twisting and turning.
• Can you name some examples of such forces at work in our everyday lives?
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Effects of a Force
• We cannot see a force but we can certainly see the effects of a force when it interacts with an object.
• We know if a force is strong or weak by observing what happens to the object during the interaction.
• Look at the example of forces in nature. We can know how strong/harmful the forces are by looking at the destruction caused.
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Destruction caused by hurricanes
Devastation at the Indonesian earthquake
Source: images.search.yahoo.com
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Some forces are useful suchas the wind which is a force that can propel sailing boats and windmills (for mills andgeneration of electricity).
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Effects of a Force• What else can forces do?• Forces can cause things to:- Start moving- Move faster- ---------- ---------- ---------- ---------(Can you list the rest?)
Not forgetting, useful forces help us to do work. How?
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We’ll have to look atMan & His Environment
(BIG IDEA)again!
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Man and His Environment• Man interacts with his environment by making
use of machines to make work easier for us.
• These machines can be big or small, simple or complex.
• How do machines make it easier for us to do work?
• Let’s explore!!!
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• Let’s go to the website http://www.edheads.org
• Click on Simple Machines
• Click on Simple Machines Glossary to learn about the different types of simple machines
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• When you are done with that, go to the Simple Machines Home, under Simple Machines Activities, click Start.
• Test yourself by identifying the different types of simple machines in the various places in The Home and answer the questions within.
• Do likewise for The Tool Shed.
• Have Fun!!!
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Welcome Back!
• Remember the essential or guiding questions at the beginning of the presentation?
• Can you try to answer some of the questions?
• Ask yourself if you can link the concepts you’ve learnt to the questions such as:
- How is Man affected by his environment?
- How does the interrelationship between Man and his environment benefit mankind?