Answer the following question given this paragraph: The four planets closest to the Sun - Mercury, Venus, Earth, and Mars - are the inner planets . They are similar to Earth. All are solid, dense, and rocky. None of the inner planets has rings. Compared to the outer planets, the inner planets are small. They have shorter orbits around the Sun and they spin more slowly. Venus spins backwards and spins the slowest of all the planets. Q: Which planet is closest to the sun? Choices: - Earth - Jupiter - Venus - mercury A:
mercury
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Answer the following question given this paragraph: Tim Wilson. Regularly done aerobic activities can help build up endurance and make the heart stronger . CC BY 2.0. Q: Regularly done aerobic activities can help build up endurance and make what vital organ stronger? Choices: - stomach - brain - skin - heart A:
heart
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Answer the following question given this paragraph: To Your Health: Energy Expenditures Most health professionals agree that exercise is a valuable component of a healthy lifestyle. Exercise not only strengthens the body and develops muscle tone but also expends energy. After obtaining energy from the foods we eat, we need to expend that energy somehow, or our bodies will store it in unhealthy ways. Like the energy content in food, the energy expenditures of exercise are also reported in kilocalories, usually kilocalories per hour of exercise. These expenditures vary widely, from about 440 kcal/h for walking at a speed of 4 mph to 1,870 kcal/h for mountain biking at 20 mph. Table 7.2 "Energy Expenditure of a 180-Pound Person during Selected Exercises" lists the energy expenditure for a variety of exercises. Saylor URL: http://www. saylor. org/books. Q: Like the energy content in food, the energy expenditures of exercise are also reported in what units? Choices: - ironies - gigabytes - grams - kilocalories A:
kilocalories
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Answer the following question given this paragraph: After a star becomes a red giant, it will take one of several different paths to end its life. Which path is followed by a star after the red giant phase depends on its mass. During the fusion life of a star, its size is the result of a competition between fusion heat pushing the material out and gravity pulling the material in. At the end, gravity always wins. After the star has lived through its red giant stage, the fusion essentially ends (the star runs out of fuel) allowing gravity to collapse the star. Some of the outer layers of material will be blown away and the core becomes smaller and denser. The core will become either a neutron star, a white dwarf, a black dwarf, or a black hole. Q: After what life stage does the fusion inside a star end? Choices: - blue giant - yellow dwarf - white dwarf - red giant A:
red giant
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