GROWING PLANTS

GROWING PLANTS

Good  morning students!! Welcome  to  our  new  way  of  learning science.

 Before  starting  today's  lessons  let  me  ask  you  a  question.

Can  plants  speak to  one another??

Your  answer  may  be  NO ,but odd as it sounds, plants can communicate with each other. Just like animals, plants produce all kinds of chemical signals in response to their environments, and they can share those signals with each other, especially when they're under attack. These signals take two routes: through the air, and through the soil. 

             Plants  are   the most  important living organisms  on earth . They provide  oxygen , food and  clothing.

Today  let  us  learn more  about plants. The  name of our lesson is  GROWING PLANTS.

By the end of today's lesson you will learn:- 

• How  new  plants  grow from seeds ,process of    germination.
• Different  parts of  a seed.

            Most  plants  grow  from  seeds.  A   seed  grows into  a  baby  plant  when  these essential  conditions are met ----- proper  amount  of  water  , air  and  warmth . 

 The   process in which a seed  turns into  a  seedling  is called  germination. 

For  learning  the process of germination  we  should  first  examine  the  parts  of  a  seed.

A  seed  has  three main parts:-

1)  SEED  COAT:- the  outer  hard protective  covering of a                                                                                                           seed

2) EMBRYO:-  the tiny  plant  inside a seed.

3) COTYLEDONS  OR SEED  LEAVES:- the  fleshy part of the seed that stores food for the  baby plant.

Watch this:

Some  plants  have  one  cotyledon and  some  have two.

The plants  with one cotyledon are called  MONOCOT  PLANTS.

eg:- Maize , Rice, Onion

The  plants  with  two  cotyledons  are  called DICOT PLANTS

eg:- Gram , Pea , Beans.

During  germination  the  root  or the  RADICLE  comes  out of  a seed  and  grows downward. The  shoot  or the  PLUMULE   grows  upward  to produce  stem and  leaves.

Hope  you all enjoyed  the  lesson , so let's check  what we  learnt today.

Take  an interleaved copy. 
Leave the  first page to  write  you  name , class and  index.
On the  second page(ruled  side) draw  double  lines using your  ruler.
Write the  name  of the  lesson 'GROWING PLANTS' ,date  on your left hand  side.
Now  copy  these  questions  and try to  answer them on  your own.

1)  Define  the  term  germination.

2)What  are the  three main parts of  a seed? Explain the function of each part.

3) What  are  monocot and  dicot  plants? Give  examples  for each.

Home work:-

Draw this  picture   on the  blank  side of your  copy and  label the  parts of the  seed.

That's  all for  today  boys!  Thank  you  and have  a  wonderful day!