Tooth decay is prevented by the addition of what chemical to many municipal water supplies?

Through which material can light waves travel but sound waves cannot travel?

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The speed of light in a vacuum is approximately 299,500,000 meters per second. In scientific notation, we can write this number as a * 10b where a = and b =.

Characteristics of plant cells include which of the following?

Numerous earthquakes occur at the San Andreas fault because it: A. is located near a volcano B. is the boundary between two plates C. used to be a trench D. is the site of many turbidity currents

Homeostasis is classified under which of the following A. Cell respiration B. Transcription C. Cell regulation D. Photosynthesis

A ball, with a mass of 10 kg, is dropped from the top of a building, from a height of 20 meters. Explain what will happen to the potential energy if the 10 kg mass is replaced with a mass of 40 kg and the height of the drop remains constant.

Which of the following is a disadvantage of animal endoskeletons? a. Endoskeletons allow organisms to grow large in size. b. Endoskeletons don't need to be molted as an organism grows. c.

A species of cactus is adapted to a desert climate. Over a period of many years, the climate becomes wetter. How will the cactus population most likely be affected by this change? A It will grow as more water resources become available.

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