Science Study Guide Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
Ductility | to pull a substance, typically a metal, into a thin wire |
Reactivity | substance to chemically react with other substances |
Malleability | substance to be hammered or pounded into a thin sheet |
Density | substance in a given volume, determines if objects will float or sink when combined physically. |
Solubility | substance to dissolve in another |
Flammability | substance to burn |
Mass | amount of matter in an object |
Volume | amount of space an object occupies |
Chemical Property | changes that are possible for a substance |
Chemical Change | process by which new substances are formed |
Temperature | average kinetic energy of the molecules in a substance, how fast the molecules are moving. |
conduction | transfer of heat by direct contact between objects |
convection | The transfer of heat through waves, does not require direct contact between objects. |
How does a physical change differ from a chemical change? | physical change- changed without change its chemical composition Chemical change- involves a chemical reaction |
What are the signs that indicate that a chemical change has happened | color change. gas production. release of heat. light. odor. sound |
What happens to the particles of a liquid when it becomes a gas | gain energy and break away from each other. |
What measurement is the same as the melting point of a substance | freezing point, they are opposites. |
Carbon dioxide gas can enter the air from dry ice. What has to happen to the dry ice | dry ice must gain energy to cause the molecules to increase in speed, forming the gas |
Railroad tracks have gaps between the rails so that they will not buckle in hot weather. What would cause the rails to buckle | thermal expansion of the metal the tracks are made of could cause them to buckle in hot weather. |
What does heat do to particles during a chemical reaction | Heat breaks the original bonds between particles and creates new bonds during a chemical reaction |
What is absolute zero (the values and the definition | Absolute zero is 0°K, it is the point where molecules of a substance stop moving. |
What happens to thermal energy when a substance changes state | Thermal energy changes the temperature of the substance |
Explain the difference between an insulator and conductor | Insulators do not allow heat and electric current to flow easily - conductors allow the transfer of heat |
What did Democritus, Dalton, Thomson, Rutherford, and Bohr all have in common | contributed to The Atomic Theory |
In Thomson’s “plum-pudding” model of the atom, the plums ¬represent which subatomic particle | electrons |
Which of the subatomic particle has the least mass | Electrons |
How did Democritus describe atoms | Small, hard, indivisible |
What is the smallest particle into which an element can be divided and still be the same substance | atom |
Which subatomic particle is negatively charged? Where is this particle located in the atom? | Electrons. found in electron clouds |
Which subatomic particle is positively charged? Where is this particle located in the atom? | Protons. found in nucleus |
Which subatomic particle has no charge? Where is this particle located in the atom? | Neutrons found in nucleus |
What do we call the dense center of the atom? | nucleus |
How do elements join to form compounds | a specific recipe for each compound |
What is a pure substance made of two or more elements that are chemically combined | compound |
How is a compound different from a mixture? | Compounds are formed when two or more original substances lose their properties to chemically form a new substance |
When elements form mixtures do the elements form a new substance or keep their original properties | Elements in a mixture are not chemically combined so they keep their original properties |
What type of change forms a compound | Compounds must be combined by a chemical change |
Created by:
smileyk
Popular Science sets