Chemistry Study Guide Answers

Chemistry Study Guide
1. Define viscosity. The resistance of the flowing to liquid. Thicker fluids flow slower than thinner
2. What are some examples of substances with low viscosity and high viscosity? Low viscosityrubbing alcohol, water , motor oil Higher viscosity- pancake syrup, lava
3. Define physical property. A property that does not change an object or substance into
something new
4. Color is an example of which property? Physical Property
5. Flammability is an example of which property? Chemical Property
6. Rusting is an example of which property? Chemical Property
7. Texture is an example of which property? Physical Property
8. An ice cube tray is filled and placed into the freezer. Three hours later when the ice tray is taken
out ice cubes have formed. The ability for water to change states of matter is which property?
Physical Property
9. You find a rusty nail. The ability for the nail to rust is which property? Chemical Property
10. What physical property of iron would allow you to separate it from a mixture of gravel and
sand? Magnetism
11. What is the formula for density? Density = Mass/Volume
12. How do you know if an object will sink or float by looking at the density of that object? If the
density of an object is greater than 1, it will sink. If it is less than 1, it will float.
13. How do substances layer? The liquids that are denser will be on the bottom. The liquids that
have a low density will be on top.
14. Give an example of a substance as a solid, liquid, and gas. Water-solid-ice liquid-liquid water
gas- water-water vapor
15. A solid has a/an___definite___________ shape and a/an ___definite___________ volume.
16. A liquid has a/an ___indefinite_____________shape and a/an_______definite___________
17. A gas has a/an________indefinite__________ shape and a _________indefinite___________
18. Define evaporation. Give an example. Liquid to gas Ex. The puddle of water disappears after the
sun comes out.
19. Define melting. Give an example. Solid to liquid Ex. Ice cream in a bowl that was left out on the
kitchem table.
20. Define sublimation. Give an example Solid to gas Ex. Dry ice used to make fog for a haunted
21. Define freezing. Give an example Liquid to a solid Ex. Filling an ice cube tray with water and
placing it into the freezer to get ice.
22. Define condensation. Give an example gas to a liquid Ex. The mirror in your bathroom is
covered in steam after you take a hot shower
23. Define physical change. Give an example A change that does not make a new substance Ex.
Mass, color, density, luster, malleability, ductility, flexible, texture, ripping,
24. Define chemical change. Give an example A change that makes a new substance Ex Rusting,
burning, reacting
25. Define thermal change. Give an example A thermal change is when a chemical reaction takes
places and causes a rise or fall in temperature. Ex. Baking soda and vinegar reacting causes a
decrease in temperature of the substances.
26. How do you know a chemical change has occurred? A new substance will form
27. When looking at the Periodic Table, what will tell you the number of protons in an atom of
carbon? Atomic number
28. What does the subscript in a chemical formula tell you? The amount of atoms in each element in
a chemical formula
29. One indicator for an element to be an element is that it is a pure substance. What are the other
two things that indicates an element is an element? It can’t be broken down any further, and it
only has one atom
30. Define chemical bond. The combining of elements chemically
31. What does the Law of Conservation of Matter state? Matter is neither created or destroyed
32. Na + Cl-- NaCl What is this an example of? Chemical equation
33. A compound is a pure substance, contains two or more atoms, and ___is chemically
34. How was the first Periodic Table arranged?
Be able to determine the atomic number, symbol, atomic mass of an element.
What does the location of an element on the Periodic Table tell you? The properties of the
Give an example of an element. Carbon, Oxygen, Hydrogen, Sulfur, Helium, Phosphorus
Give an example of a compound. NaCl, KCL, CaCO
Give an example of a homogeneous mixture. Homogeneous mixtures look the same throughout.
Ex. Kool-aid, apple juice, chocolate milk
Give an example of a heterogeneous mixture. The mixture can easily be separated into different
parts. You can see the parts. Ex. Salad, pizza, chex mix , peanut butter and jelly sandwich
Be able to recognize the number of elements in a formula.HClSONaN has 6 elements
How many molecules are in the following formula?
What is this picture an example of? A compund
44. Balance the following chemical equations. Be able to balance the equations
45. Define inhibitor. Give an example. A substance that slows down a chemical reaction Ex.
Preservatives in food
46. Define catalyst. Give an example. A substance that speeds up a chemical reaction Ex. Enzymes
47. Define endothermic reaction. Give an example. A chemical reaction that absorbs heat Ex. Baking
Soda and Vinegar
48. Define exothermic reaction. Give an example. A chemical reaction that releases heat Ex. Zinc
and Hydrochloric Acid
49. How does surface area affect the rate (how fast) of a chemical reaction? Smaller surface area
the reaction time will decrease. Larger surface area the reaction time will increase.