Persh Chapt 7 Word Scramble
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Question | Answer |
What is the table called that lists all the known elements? | The Periodic Table of the Elements |
How do you calculate density? | Density = mass / volume |
What is a compound? | a substance that consists of 2 or more different atoms that have become chemically bonded to each other |
What kind of mixture do you get when you dissolve sugar in water? | Homogeneous |
The amount of mass in a given amount of volume is called what? | density |
When looking at an atom--what 2 things are in the nucleus | protons and neutrons |
When looking at an atom, what is in the outer rings | electrons |
What substance consists of only one type of atom? | an element |
What is a heterogeneous mixture? | a mixture that has substances that are not evenly mixed |
What is the boiling point of water? | 100 degrees C |
What is the freezing and melting point of water? | 0 degrees C |
What is mass? | the of matter contained in an object |
What is it called when an object can carry heat? | thermal conductivity |
What does not change, even if you change the size of a beaker? | the boiling point |
What are some changes that may happen if matter goes through a physical change? | size, state, shape |
What cannot be lost or created in a chemical or physical change? | Mass |
Ice cubes melting is an example of this... | change of state |
During a change of state, what often moves in our out of a substance? | heat or thermal energy |
What is a chemical change? | A change when matter changes into a new substance with new physical or chemical properties |
What happens when thermal energy is removed? | the temperature decreases |
What is sublimation? | when a solid changes directly into a gas |
What are flammability and reactivity? | 2 chemical properties |
What affects the reaction rate? | increasing surface area, increasing temperature and increasing the concentration |
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