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CSET Physical Science 3
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CSET Physical Science 3
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25 Questions

1. Heat tends to move from a high - temperature region to a low- temperature region - This heat transfer may occur by the mechanisms of conduction - radiation - and convection

2. Formed by the chemical combination of two or more elements in a fixed ratio Example: water

3. Makes it possible for some elements and compounds to transition from a solid to gas phase without becoming a liquid Example: a block of dry ice (CO2) - which will turn into a gas at room temperature

4. A source of electric light that works by incandescence - An electric current passes through a thin filament - heating it until it produces light - The enclosing glass bulb prevents the oxygen in the air from reaching the hot filament - which otherwis

5. Made by combining two or more different materials without a chemical reaction occurring (the objects do not bond together) - They are the product of a mechanical blending or mixing of chemical substances - Either homogeneous or heterogeneous

6. A hypothesis is an attempt to answer the question or predict the outcome - - A hypothesis is a possible explanation for a set of observations

7. Account for 17 elements in the periodic table - Lack the properties of metals but are very common - Include oxygen - nitrogen - and carbon - 7 metalloid elements - and 7 gases - Poor conductors of electricity

8. An electric current also generates a magnetic field - demonstrating an intimate connection between electricity and magnetism - Recent work has united these phenomena - as well as light - into electromagnetic radiation

9. The ability to perform work - _______ transformations result when a change of form takes place - All forms of ________ can be converted into other forms

10. Symbol: Fe Protons: 26 Neutrons: 30 Mass 56

11. Resistance to plastic (permanent) deformation due to a constant load from a sharp object

12. Scratch hardness - indentation hardness - and rebound hardness

13. The burning of coal also contributes to the formation of...

14. Electricity flows easily through materials that conduct electricity - Include metals such as aluminum (Al) - iron (Fe) - nickel (Ni) - silver (Ag) - and gold (Au)

15. A compound composed of one atom of sodium and one atom of chlorine (NaCl - sodium chloride)

16. Protons have a __________ electrical charge - and neutrons have no charge

17. The particular state of water is determined by ___________ - the behavior of water at one atmosphere (sea level) - freezing at 0

18. Show the number of molecules or formula units of the reactants and products - Example: nitrous oxide is a colorless - odorless gas that causes mild hysteria when inhaled - hence the name laughing gas; it is prepared by heating ammonium nitrate crysta

19. As of 2006 - the table contains _____ chemical elements whose discoveries have been confirmed - 94 are naturally found on the earth - and the rest are synthetic elements that have been produced artificially in particle accelerators

20. Arranges all of the known elements from left to right and top to bottom in order of increasing atomic number - and they generally coincide with their increasing atomic mass

21. A compound and portable inclined plane - A triangular - shaped tool used to separate two objects or portions of an object - lift an object - or hold an object in place - It functions by converting a force applied to its blunt end into forces perpendi

22. The characteristics that makes up the physical composition of a substance - Include color - form - electrical conductivity - and density

23. For smooth surfaces - the angle at which light is incident on the surface equals the angle at which it is reflected

24. Releases energy when a heavy nucleus splits into smaller fragments - Used in power plants and atomic bombs

25. Opposite process of nuclear fission - Yields energy when very light nuclei unite to a heavier nucleus - Stars (including the sun) derive their energy from nuclear fusion

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