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Praxis General Science
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Praxis General Science
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25 Questions

1. Number of protons

2. Alkali Metals are the most _____________

3. The object is further than one focal length from the lens

4. Measures the amount of matter in an object

5. The volume of a gas is directly proportional to the temperature of a gas

6. The total entropy of a system plus that of its surroundings always increase.

7. What are the # of protons in the nucleus of an atom called?

8. Atoms of the same element that have different numbers of neutrons

9. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.

10. Specific gravity is the ratio based on...

11. Is a simple device used to indicate the existence of a positive or negative charge.

12. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions

13. Change from gas to liquid

14. 2 or more substances combine to form a compound EX. A+B -> AB

15. Is the change from liquid to gas.

16. Electrons in the outermost energy level; they are involved in bond formation

17. Mass & weight are not the ____ quality

18. Uses sound waves to locate objects and is especially useful underwater the sound waves bounce off the object and are used to assist in location

19. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.

20. The molecular weight of a substance expressed in grams - measures the amount of a substance

21. Atoms of the same element that have different numbers of neutrons

22. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B

23. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy

24. The amount of heat it takes to change a solid to a liquid

25. Is the transfer of heat with no actual transfer of matter. Ex. Iron pan of flame.