5.2 Plants grow

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- Put your phone in the bag
- Bags are off the table
- Books and ipads are on the table
- Did you do your homework?
 
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Slide 1: Tekstslide
BiologieMiddelbare schoolhavo, vwoLeerjaar 1

In deze les zitten 18 slides, met interactieve quizzen en tekstslides.

Onderdelen in deze les

Are you ready?
- Put your phone in the bag
- Bags are off the table
- Books and ipads are on the table
- Did you do your homework?
 

Slide 1 - Tekstslide

5.2 Plants Grow
Learning objectives 
You will learn how a seed becomes a plant, how the plant develops further, and how a tree grows.




Slide 2 - Tekstslide

Quiz!
15 seconden per vraag!

Slide 3 - Tekstslide

Sequoia
  • Very large diameter (one of the largest actually)
  • North America



You need more than fifteen people to make a circle around the stem.

Slide 4 - Tekstslide

How tall do you think a sequoia can grow?
A
25 m
B
50 m
C
100 m
D
200 m

Slide 5 - Quizvraag


Is it a herbaceous or woody plant?
A
Herbaceous
B
Woody

Slide 6 - Quizvraag

What is germination?

Slide 7 - Open vraag

What grows first in a plant?
A
Roots
B
Stem
C
Leaves

Slide 8 - Quizvraag

What is the difference between growth and development?

Slide 9 - Open vraag

How does a plant grow from a seed?
Flowers become fruits!

Seed coat = outer layer that protects the germ and cotyledons.

Cotyledons (ko·tuh·lee·dnz) = the first pair of leaves with reserve food for the germ.

Germ = the very young plant that is inside a seed.

Slide 10 - Tekstslide

Germinating
  1. First, the seed coat absorbs water.
  2. This causes the cotyledons to swell and the seed coat to burst open.
  3. Then the roots start growing.
  4. Then the stem and the leaves grow.



Why do the roots start growing before the leaves?



Slide 11 - Tekstslide

Growth
Cell division and cell growth

Meristems = the far ends of stems and roots; here, the plant forms new cells

Development

Slide 12 - Tekstslide

Branch
terminal bud = a bud at the end of a branch, from which tree branches get longer

lateral buds = buds on branches from which new side branches grow  

bud scales = scales that protect the bud on a branch against the cold and insects

bud scale scar = a ring-shaped scar on a branch, at the spot where the bud scales fell off a terminal bud (one year).




Slide 13 - Tekstslide

Stem
Growth layer = New wood cells are formed there in spring and summer.

Annual growth ring = layer of wood cells that is formed in one year, (oldest in the middle)
  • Light brown = Wood cells that develop during spring (large and thin cell walls).
  • Dark brown = Wood cells that develop during summer (smaller and thicker cell walls).

Information about the tree (age, drought, pest, growing at an angle)

Slide 14 - Tekstslide

Why does a root grow downwards?
  • gravity
  • starch granules sink down
  • stem responds to sunlight

Slide 15 - Tekstslide

Slide 16 - Tekstslide

What?
Make 5.2: assignments 4,5,8-10,12,14
How?
In your workbook (or computer). Use the information from your textbook. 
Help?
You may gently consult with your neighbor. Raise your hand if the two of you can't figure it out together.
Time?
10 minutes
Finished?
Start to work on your research paper.
Product
You have practiced 5.2.

Slide 17 - Tekstslide

Let's discuss the lesson!

Don't pack your bags yet!
What did you learn today?

When de bell rings:
- Pull up your chairs
- Don't forget your phone

Slide 18 - Tekstslide