Ques:Q: What term refers to the emission of material or energy from an atom's nucleus? Read this paragraph and choose the correct option from the provided answers: Radioactivity involves the spontaneous emission of material and/or energy from the nucleus of an atom. The most common radioactive atoms have high atomic numbers and contain a large excess of neutrons. Some typical radioactive elements are technetium (atomic number 43), promethium (atomic number 61), and all elements atomic number 84 (polonium) and higher. There are four primary types of emission, either involving the release of a particle from the nucleus or the release of energy. In many instances, both energy and a particle are produced by the radioactive event. Choices: - smog - microscopic - stasis - radioactivity A:

Ans:radioactivity
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Ques:Q: What is the condition in which the thyroid gland is overactive is known as? Read this paragraph and choose the correct option from the provided answers: Hyperthyroidism is a condition in which the thyroid gland is overactive. Hypothyroidism is a condition in which the thyroid gland is underactive. Which of the conditions are the following two patients most likely to have? Patient A has symptoms including weight gain, cold sensitivity, low heart rate and fatigue. Patient B has symptoms including weight loss, profuse sweating, increased heart rate and difficulty sleeping. Choices: - susceptibility - hypothyroidism - hepatic - hyperthyroidism A:

Ans:hyperthyroidism
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Ques:Q: What is the only way of transferring energy that doesn't require matter? Read this paragraph and choose the correct option from the provided answers: Both conduction and convection transfer energy through matter. Radiation is the only way of transferring energy that doesn't require matter. Radiation is the transfer of energy by waves that can travel through empty space. When the waves reach objects, they transfer energy to the objects, causing them to warm up. This is how the sun's energy reaches Earth and heats its surface (see Figure below ). Radiation is also how thermal energy from a campfire warms people nearby. You might be surprised to learn that all objects radiate thermal energy, including people. In fact, when a room is full of people, it may feel noticeably warmer because of all the thermal energy the people radiate! To learn more about thermal radiation, watch "Radiation" at the URL below. Choices: - mutation - evaporation - convection - radiation A:

Ans:radiation
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Ques:Q: What are these examples of: a person riding a carousel and a skydiver in free fall? Read this paragraph and choose the correct option from the provided answers: Examples of acceleration include a person riding a carousel and a skydiver in free fall. Choices: - vibration - centrifugal force - centripetal force - acceleration A:

Ans:
acceleration
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