Secondary One Secondary One Integrated ScienceIntegrated ScienceUnit 2Looking at living things

2.1 Characteristics of living things

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Nov-2010

What is a living thing?What is a living thing?Are you living thing?Why do you think so?

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How do scientists define living How do scientists define living things? things? Seven characteristics

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Let’s watch a video Let’s watch a video first……first……http://www.youtube.com/watch?v

=FkmxyX9PgkY

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Please pay

attention to the video!

What do you learn from the What do you learn from the video?video?

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1.Eating2.Movement3.Breathing4.Waste Removal5.Growth6.Sensitivity7.Reproduction

Do you think plant is living Do you think plant is living thing?thing?

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Let’s go through the Let’s go through the characteristics one by one.characteristics one by one.Textbook P.64-66 Classroom

Activity 2.2

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11stst characteristic characteristicLiving things can ________ .

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22ndnd characteristic characteristicLiving things need ____ .

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33rdrd characteristic characteristicLiving things need _______ .

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44thth characteristic characteristicLiving things can _______ .

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55thth characteristic characteristicLiving things can

_______________ .

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66thth characteristic characteristicLiving things can _____________

to stimuli.

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77thth characteristic characteristicLiving things can ___________ .

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Seven characteristics of Seven characteristics of living thingsliving thingsLiving things can

◦Move◦Grow◦Reproduce◦Response to stimuli◦Excrete

Living things need◦Air◦Food

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How about the following How about the following objects?objects?

http://www.youtube.com/watch?v=x_ZFx9nDbhk

Can you give some characteristics they have?

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3. We can

move!

1. We can

response when

you touch us!

2.We need food(batte

ry)!

4. So, are we living things

?

The answer is……The answer is……

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No, we are not living things.We cannot breathe.

We cannot reproduce.We cannot grow.

We cannot excrete.

ConclusionConclusion

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An object with all seven characteristics is defined as living

thing.

If there is at least one characteristic is missing, it is not a

living thing!

So, we are non-living things!

SummarySummaryLiving things ( 生物 )

◦Seven characteristics ( 七大特徵 ) Can move ( 可以移動 ) Need air ( 需要空氣 ) Need food ( 需要食物 ) Can grow (可以生長 ) Can reproduce ( 可以生殖 ) Can response to stimuli ( 可以對刺激作出反

應 ) Can excrete ( 可以排泄 )

Non-living things ( 非生物 )19