Science Lesson Activity- Light

Do you think this is a good Activity for a Light lesson ?

Read the following directions and make a prediction and explain your reasoning after each question about what will happen.
1. Tape one piece of cellophane over the bulb end of each flashlight.
2. In a dark room, turn on the flashlights.
3. Shine the red and green flashlights on to the white card. What happens? (You make the color yellow.) Try mixing the blue and green lights. (You get cyan.) Now mix the blue and red lights. (You get magenta.)
4. Put the white toy in the center of the card and shine the three flashlights on it. Have the students circle around the toy to see it in different colors.
5. Ask them what color you will get if you shine all three lights on the white card at the same time. (You get white. White light is made up of red, blue, and green. These are called the primary colors. To get black, you would have mixed colored paints, not lights.)
After each observation, explain what happened and what the differences were between what you expected and what actually occurred.

Science Lesson Activity- Volcano

I was wondering if you could give me some feedback. Do you think this is a good "Activity before Content" for my lesson?

Magma Flow: How does the temperature affect the movement of magma?

Read the directions and what is required during this explore, and make a prediction about the outcomes.

1) Fill the teaspoon with margarine

2) Put the margarine into the baby-food jar

3) Hold the jar in your hand and turn on its side

4) Observe movement of the margarine

5) Fill bowl halfway with warm water

6) Set the baby-food jar in the warm water

7) Pick up jar and turn on its side after three minutes

8) Again, Observe the movement by the margarine

Explain what you observed during the activity. What was different about what you predicted and what you observed?

What the students will observe is that the margarine did not move when the jar was first tilted. After it was warmed up, the margarine was able to move more freely. This happens because the molecules in the butter had more energy. Warm molecules move away from each other. This causes solids to melt and liquids to thin. This is the same as the temperature of magma. The warmer the magma is, the faster it moves up through the volcano’s vent ( channel of a volcano that connects the source of magma to the volcano’s opening).