Q: Q: What astronomical phenomenon is often comprised of remnants of the earliest material that formed in the solar system? Read this paragraph and choose the correct option from the provided answers: Many meteorites are remnants of the earliest material that formed in the solar system. Choices: - asteroids - particles - comets - meteorites A:
A: meteorites

Q: Q: Positive charge is mostly found in what part of an atom? Read this paragraph and choose the correct option from the provided answers: Rutherford's discoveries meant that Thomson's plum pudding model was incorrect. Positive charge is not spread evenly throughout an atom. Instead, it is all concentrated in the tiny nucleus. The rest of the atom is empty space except for the electrons scattered through it. In Rutherford's model of the atom, which is shown in the Figure below , the electrons move around the massive nucleus like planets orbiting the sun. That's why his model is called the planetary model. Rutherford didn't know exactly where or how electrons orbit the nucleus. That research would be undertaken by later scientists, beginning with Niels Bohr in 1913. New and improved atomic models would also be developed. Nonetheless, Rutherford's model is still often used to represent the atom. You can see an animated version of the model at this URL: http://www. clickandlearn. org/gr9_sci/atoms/modelsoftheatom. html . Choices: - electron shell - neutrons - ions - nucleus A:
A: nucleus

Q: Q: The ileocecal valve, a sphincter, is usually in a constricted state, but when motility in the ileum increases, this sphincter relaxes, allowing food residue to enter the first portion of what? Read this paragraph and choose the correct option from the provided answers: The ileocecal valve, a sphincter, is usually in a constricted state, but when motility in the ileum increases, this sphincter relaxes, allowing food residue to enter the first portion of the large intestine, the cecum. Relaxation of the ileocecal sphincter is controlled by both nerves and hormones. First, digestive activity in the stomach provokes the gastroileal reflex, which increases the force of ileal segmentation. Second, the stomach releases the hormone gastrin, which enhances ileal motility, thus relaxing the ileocecal sphincter. After chyme passes through, backward pressure helps close the sphincter, preventing backflow into the ileum. Because of this reflex, your lunch is completely emptied from your stomach and small intestine by the time you eat your dinner. It takes about 3 to 5 hours for all chyme to leave the small intestine. Choices: - small intestine - colon - liver - large intestine A:
A: large intestine

Q: Q: The female reproductive organs include the ovaries, fallopian tubes, uterus, and what? Read this paragraph and choose the correct option from the provided answers: The female reproductive organs include the ovaries, fallopian tubes, uterus, and vagina. Choices: - intestines - womb - bladder - vagina A:
A: vagina