(Q).
Answer the following question given this paragraph: Osteoporosis is a disease in which bones lose mass and become more fragile than they should be. Osteoporosis also makes bones more likely to break. Two of the easiest ways to prevent osteoporosis are eating a healthy diet that has the right amount of calcium and vitamin D and to do some sort of weight-bearing exercise every day. Foods that are a good source of calcium include milk, yogurt, and cheese. Non-dairy sources of calcium include Chinese cabbage, kale, and broccoli. Many fruit juices, fruit drinks, tofu, and cereals have calcium added to them. It is recommended that teenagers get 1300 mg of calcium every day. For example, one cup (8 fl. oz. ) of milk provides about 300 mg of calcium, or about 30% of the daily requirement. Other sources of calcium are pictured in the Figure below . Q: What mineral that occurs in bones helps combat osteoporosis? Choices: - magnesium - iron - potassium - calcium A:
(A).
calcium

(Q).
Answer the following question given this paragraph: Over time, deposited sediments may harden into rock. First, the sediments are compacted . That is, they are squeezed together by the weight of sediments on top of them. Next, the sediments are cemented together. Minerals fill in the spaces between the loose sediment particles. These cementing minerals come from the water that moves through the sediments. Sedimentary rocks that form from sediments are called "clastic rocks. " Clastic rocks are rock fragments that are compacted and cemented together ( Figure below ). Q: Over time, deposited sediments may harden into what? Choices: - coral - fossils - deltas - rocks A:
(A).
rocks

(Q).
Answer the following question given this paragraph: Electromagnetic waves vary in their wavelengths, frequencies, and energy levels. The full range of electromagnetic waves makes up the electromagnetic spectrum. Q: What do we call the full range of electromagnetic waves? Choices: - electromagnetic scale - molecular spectrum - mechanical spectrum - electromagnetic spectrum A:
(A).
electromagnetic spectrum