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Name: ______________________________________ Date: ________________________

Student Exploration: Identifying Nutrients

Vocabulary: carbohydrate, disaccharide, lipid, monosaccharide, polysaccharide, protein, starch

Prior Knowledge Questions (Do these BEFORE using the Gizmo.)

1. What are the major types of nutrients you can get from food? _____proteins, carbohydrates, lipids_______________________________________________________________

2. How are these nutrients used by your body? __Carbohydrates provide the body with short-term energy. Lipids provide the body with long-term energy storage and insulation. Proteins have many functions including providing oxygen to the blood, structure for our cells, and help with all the chemical reactions that take place in the body._______________

Gizmo Warm-up

Have you ever wondered what is in your food? Scientists use a variety of tests to determine the nutritional content of food. You will learn four of those tests with the Identifying Nutrients Gizmo™.

1. Below the Food samples label, drag tube A into the Food sample holder. Below the Benedict test, click the Test button. What is done in the Benedict test?

__A drop of benedict’s solution is added to the sample and placed over heat.___________________

___________________________________________

2. The Benedict test is a test for monosaccharides; simple sugars like glucose or fructose (fruit sugar). In contact with monosaccharides, the Benedict solution turns from blue to pink.

Does Sample A contain monosaccharides? _YES________

Note: Disaccharides such as sucrose (table sugar) and lactose (milk sugar) are more complex than monosaccharides. The Benedict test does detect disaccharides directly.

|Activity A: |Get the Gizmo ready: |[pic] |

| |Click Reset....