Download STC Plants Lesson 13B

STC Plant Growth and
Development
Lesson 13: Making a Brassica
Model
Option B
Kennewick School District
STC Plant Growth and Development
Lesson 13B: Making a Brassica Model
Materials list—Option B
For petals:
For filaments to support the anthers:

4 yellow styrofoam meat trays

6 pipe cleaners
OR
OR

1 plastic milk jug painted yellow  6 soda straws
OR
OR

Cardboard painted yellow

6 popsicle sticks
OR

6 coffee stirrers
For anthers:

6 styrofoam packing “peanuts” painted yellow
OR

6 yellow jelly beans
Materials list continued on next slide…
STC Plant Growth and Development
Lesson 13B: Making a Brassica Model
Materials list (cont.)—Option B
For leaves and sepals:
For fastening parts to the stem:

2 green plastic 2-liter soda bottles  Modeling clay
OR
OR

1 plastic milk jug painted green  Styrofoam balls with a center hole
OR

Cardboard painted green
For the pistil:

1 cardboard tube
For the stem:

1 dowel or sturdy twig
STC Plant Growth and Development
Lesson 13B: Making a Brassica Model
Directions

1. Draw and cut out the following parts and
paint them the appropriate colors:
4 petals
4 sepals
3 to 5 true leaves
2 seed leaves

2. Paint the six anthers yellow. Poke four
long and two short filaments into the
anthers to support them. Use pipe cleaners,
soda straws, popsicle sticks, or coffee
stirrers for the filaments.
STC Plant Growth and Development
Lesson 13B: Making a Brassica Model
Directions

3. Fasten all the parts to the stem. Use
lumps of modeling clay or styrofoam balls
with a center hole cut to fit the dowel. Use
this as the base for attaching parts to the
stem.
STC Plant Growth and Development
Lesson 13B: Making a Brassica Model
Directions

4. Now the model is complete. It can be
either hand held or stood up in a coffee can
of sand for support.
Figure 13-5
Fully assembled
model plant
STC Plant Growth and Development
Lesson 13B: Making a Brassica Model
Clean up and put all supplies
where they belong.
STC Plant Growth and Development
Lesson 13B: Making a Brassica Model
Critique another group’s model for
accuracy. Think about:






Does it have the correct number of petals and
anthers?
Is only one pistil shown?
Are the parts in the right places?
Has the model been done neatly?
Is it attractive?
How much effort does it show?