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Friday, August 1, 2014

Science? It's Sedimentary, My Dear Watson!



Want a sure-fire way to make your summer rock this year? Think geology and food! As the weeks of summer stretch by, one way to keep kids engaged (and learning) is to head to the kitchen and cook up some science! Not only is this a fun way to tap into a child’s curiosity, but it maintains the momentum of learning that often stalagmites—I mean stagnates—during the summer.

Let’s get rocking! Actually, rocks come in three basic "flavors": metamorphic, sedimentary, and igneous. Metamorphic rocks are those that have "morphed" or been changed through heat and pressure. If you visit a museum this summer, you may notice the marble floor and statues. Marble is an example of metamorphic rock.  Sedimentary rock is formed from small pieces of other rocks and minerals fused together. Maybe you will be lucky enough to have a chance to walk on a sandy beach this summer. If you do, think of sandstone--a sedimentary rock formed by particles of sand cemented together. Then there’s igneous rock which is formed from liquid rock beneath the earth’s surface that has cooled and hardened.

Are you still on solid ground with all this science? Think again! Like a piece of delicious summer fruit, the earth has an outer "skin," but the inside is a whole different matter. In thickness, the surface of the earth is like the skin of a peach—only 4- 44 miles (6- 70 km) deep, compared to the rest of the earth which measures nearly 4000 miles (6400 km) to the center. Phew! Travel down to this center of the earth and you’ll find a solid metal core. This is surrounded by a thick layer of liquid metal—mostly iron and nickel. Even though the inner core has a temperature similar to the surface of the sun (9800°F / 5505°C), it is solid because of the enormous pressure pushing in on it. The next layer is called the mantle and the part of the earth that we live on is called the crust. The mantle is where the pockets of magma—molten rock—come from that erupt and form lava.

I don’t know about you, but all this talk about rocks makes me hungry. Head over to the kitchen to make this yummy Sedimentary Pizza Lasagna. Mmmm! 

Sedimentary Pizza Lasagna  
Illustration copyright © 2014 by Leeza Hernandez.

Before You Begin
Prep time: 20 minutes
Cooking time: 45 minutes
Oven temperature: 375°
Yield: 4-6 servings
Difficulty: medium

Equipment 
Frying pan
Spoon or spatula
Rectangular pan (8 x 10 inches or larger)
Heavy duty aluminum foil
Small bowl

Ingredients
1/2 pound (8 ounces) ground turkey or beef
2 cups pizza sauce
1 egg
1 cup ricotta cheese
Oven-ready lasagna noodles
Sliced pepperoni
1–2 cups shredded mozzarella cheese

Method
  1. With an adult’s help, cook the ground meat in a frying pan until it is brown. Drain off any fat. Add the pizza sauce and mix well. 
  2. Spread about 1/2 cup of the meat sauce on the bottom of the rectangular pan. Top with oven-ready lasagna noodles, overlapping slightly to cover the whole pan. Top with more sauce—about 1/2 cup. 
  3. Crack and beat the egg, then mix thoroughly with ricotta cheese. Spread half this mixture over the noodles.
  4. Arrange a layer of pepperoni next, followed by a sprinkling of cheese. Top with a layer of lasagna noodles.
  5. Repeat the layers. Cover the final layer of lasagna noodles with the remaining meat sauce and a generous amount of mozzarella cheese.
  6. Cover the pan with heavy-duty foil. Bake in a 375°F oven for 35 minutes. Uncover and bake for another 10 minutes. Can you still identify the individual ingredients?


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Posted by Ann McCallum, author of Eat Your Science Homework.

Remember the old excuse: the dog ate my homework? Did it ever work? Teachers are more savvy than that. But try saying that YOU ate your homework and you’ll put a smile on Teacher’s face. You know why? The kitchen is a laboratory, recipes are experiments, and food is science. Eat Your Science Homework releases August 5, 2014.

Ann McCallum is the author of several books for children including Eat Your Math Homework, Rabbits Rabbits Everywhere, and Beanstalk: The Measure of a Giant. Eat Your Science Homework: Recipes for Inquiring Minds, was recently named a Junior Library Guild selection. Ann lives in Kensington, MD with her family.

Leeza Hernandez has illustrated several children’s books, including Eat Your Math Homework. She is also an author and graphic designer whose art has been featured in books, magazines, and newspapers. She is the recipient of the Tomie dePaola Illustrator Award from the Society of Children’s Book Writers and Illustrators. Leeza lives in central New Jersey. Visit her online at www.leezaworks.com.

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