Grace Hartigan's Billboard
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Grace Hartigan Introduction |
Science
Explore Color in Living Organisms
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Grace Hartigan used bright, bold colors to express her feelings about her environment. Discuss the purpose of color in living organisms, for example, warning (peacock), attraction (cardinal), and camouflage (chameleon). Using color as a theme, make a collage from images of different plants and animals.
Grace Hartigan balanced her composition through careful placement of the colors. She intensified colors by placing them next to their complementary colors (a red apple against a green background) and de-emphasized colors by placing them next to similar, or analogous, colors (red lips against an orange face). Discuss complementary colors in nature, such as an apple tree with pink blossoms, unripe green apples, and ripe red apples. Discuss the purpose of these colors in nature.
Study Line and Shape in Crystals
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Grow crystals from various formulas. Examine the crystals' shapes and lines through a hand lens or a stereoscope, and draw what you see. Are shapes repeated? How? What kinds of lines are there?
Sugar crystals (rock candy) Prepare a supersaturated sugar mixture by heating distilled water and slowly adding sugar (C11H22O11) to the water until no more will dissolve. Fill clean glass jars about one-fourth full of the solution. Hang a cotton string, the thicker the better, from the center of the jar opening to the bottom of the jar. Loosely cover the jar and place it in an undisturbed place. Watch giant sugar crystals grow over the next week. The crystals are edible.
Epsom salts paint Prepare a 3:1 mixture of water to Epsom salts (MgSO4) and add it to different colors of water-soluble paint. With a brush, apply these Epsom salts paints to white construction paper. Be sure to rinse the brush well and dry it before dipping it into a new color. Let the paint dry thoroughly and observe the crystals.
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