Topics: Vitamin D, Chemistry, Sunscreen Pages: 3 (711 words) Published: October 8, 2013

1. How does Sunblock work?
Sunscreen contains organic and and inorganic chemicals. The sun shines down UV Rays which are harmful to our skin. The organic chemicals in sunscreen absorb the UV Rays through their chemical bonds. As the bonds absorb UV radiation, the parts of the sunscreen slowly break down and release heat. The higher SPF a sunscreen is, the more it protects against the UV Rays the sun shines down.

2. How does detergent work?
Detergents are made up of things called surfactants. They are substances that lower the surface tension of water, allowing the dirt or stain to be removed from the clothing. Oxidizing agents are also in detergents, they act as bleaches. The last ingredient is enzymes. They speed up the chemical reactions to get the stains out quicker.

3. What does Vitamin C do?
Vitamin C is a water soluble nutrient found in some foods. In the human body it is an antioxidant. The body also needs vitamin C to make collagen, a protein required to help wounds heal. Vitamin C improves the absorption of iron from plant-based foods and helps the immune system work properly to protect the body from disease. Lastly, it helps keep your teeth and gums healthy.

4. What kind of Iron is in cereal?
Iron rich foods have either heme or nonheme iron. Heme iron is highly absorbable and comes from meat, eggs, dairy, fish, shellfish and poultry. Nonheme iron comes from plant foods, fortified foods, like cereal, and many supplements. This type of iron isn’t as easy for your body to absorb. The type of Iron that is in cereal is nonheme.

5. What does Vitamin D do?
Vitamin D is a vitamin found in liver and fish oils. It is needed for the absorption of calcium. It prevents rickets in children and osteomalacia in adults. Sunlight gives off Vitamin D. It is also needed to absorb phosphorus. Because it absorbs calcium, it helps you have strong and healthy bones and teeth. Vitamin D helps the brain work well later in life and it is an immune...
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