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Free GED SCIENCE Exam Braindumps (page: 19)

Page 18 of 76
PDF with 75 Questions

Wheat is the staple cereal for most of the world. Flour is made from the kernel of the wheat plant. The kernels are first separated from the plant stem and then broken apart by the milling process. The husk, the outer layer unusable for most purposes, is removed.
The wheat kernel (whole grain) has three main parts: germ, bran, and endosperm. The germ is especially rich in vitamin E, niacin, and riboflavin. The bran, a protective coating around the kernel, is also a rich source of nutrients and fiber. The endosperm, making up 83% of the kernel, is the soft inside portion containing starch and proteins.
Although the enrichment of white flour restores some of the lost nutrients, there are some vitamins and minerals that are lost in the refining process and not replaced. A valuable source of fiber is also lost.
Ling reads an article that states that many people don't get enough fiber in their daily diet.
Which type of bread would be the best to recommend to Ling?

  1. whole wheat bread
  2. unenriched white bread
  3. enriched white bread
  4. sourdough bread
  5. French bread

Answer(s): A



Which of the following statements would explain why some objects feel more solid to the touch than others?

  1. The object's molecules are moving rapidly.
  2. All solids can be classified only as metals.
  3. The object's surface is flat.
  4. The space is very small between the molecules.
  5. The object is made up of heavy molecules.

Answer(s): D



Scientist Alexander Fleming was looking for a chemical that would be effective in combating bacteria. In order to test various chemicals, he grew cultures of the bacteria, Staphylococcus. One day in 1928, as he was working in his laboratory, Fleming noticed that one of his culture plates had mold growing on it. Many people might have thrown the plate away thinking that it was useless, but Fleming did not. He noticed something--that no bacteria were growing near the mold. He hypothesized that the mold was killing the bacteria. Fleming had just discovered penicillin.
He began working to separate the chemical that killed the bacteria from all the other chemicals in the mold. Unfortunately, he was unable to do so. However, in 1940, two chemists, Ernst Chain and Howard Florey, did manage to separate the chemical penicillin. In 1945, all three men were awarded the Nobel Prize in Medicine.
Based on the information, which statement represents the best conclusion?

  1. Fleming developed penicillin as an antibiotic.
  2. Fleming did not deserve his award as much as Chain and Florey.
  3. A discovery is sometimes an unexpected, accidental observation.
  4. In science, all conclusions come from carefully prepared experiments.
  5. Penicillin limits mold growth.

Answer(s): C



If you had a freshwater fish tank in your home, which type of algae would most likely survive in that type of environment?

  1. red algae
  2. red or brown algae
  3. golden-brown algae
  4. brown algae
  5. green algae

Answer(s): E






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