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A substance made of one or more atoms of a single type is a ?


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ANSWER TRUE OR FALSE FOR EACH OF THESE. 1. Life forms have been discovered on other planets. 2. The most unusual characteristic of Uranus is axis tilted 98°. 3. The two heavenly bodies which were predicted to exist before they were sighted are Neptune and Pluto. 4. The three planets which have rings are Saturn, Neptune, Uranus. 5. The most abnormal thing about Pluto is its orbit. 6. Neptune's discovery was predicted before it was actually discovered. 7. Mars has a very thin atmosphere of carbon dioxide. 8. Venus is covered with an atmosphere of dense clouds. 9. Pluto is always farther away from the sun than Neptune is. 10. Uranus is a pale green planet, with 27 satellites and several rings. 11. The asteroid belt may be the remains of a former planet. 12. Comets could possibly be millions of years old. 13. The existence of comets provides possible evidence for a young solar system. 14. Comets are made up of dust and frozen gas particles. 15. As the moon revolves around the Earth, eventually all of the moon's surface can be seen. 16. The moon's period of rotation and revolution are the same. 17. The moon revolves in the same direction as the Earth's rotation. 18. The new moon can be seen in the night sky only. 19. Ocean tides are produced by a combination of the moon and sun's gravity. 20. The largest tides occur at new moon, full moon, solar eclipse, & lunar eclipse. 21. Neap tides occur during the quarter moon phase 22. One of the first useful instruments used by astronomers to map the position of the stars was the astrolabe. 23. A telescope which has an eyepiece and large glass lens connected by a large body (tube) is called a refracting telescope. 24. A reflecting telescope uses a mirror to collect light from an object.

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The atoms family atomic

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