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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?