Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
share
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

Chapter 7

PS 8th Grade, Chapter 7 Review

QuestionAnswer
When are chemical properties observable? Only when a chemical change occurs. (7-4)
List two examples of chemical change. Burning and rusting.. 7-4
What kinds of properties can be used to describe matter? Both chemical and physical properties (7-4)
What is the term for the total set of chemical and physical properties that can be used to describe identify a substance? characteristic properties (7-4)
If a substance changes into a new substance with new characteristic properties, what kind of change has occurred? chemical (7-4)
List three clues that a chemical change might have occurred. bubbles forming, light / energy being given off, color change (7-4)
The only sure sign of chemical change is the formation of _____. a new substance (7-4)
What is another name for chemical change? Chemical reaction (7-4)
In a chemical reaction, what do the atoms do?? Rearrange / reconnect in new ways (7-4)
What do scientists usually use to represent chemical reactions? chemical equations (7-4)
In a chemical equation, what represents a substance? a chemical formula (7-4)
In a chemical equation, what does the arrow mean? a chemical reaction is taking place (7-4)
In a chemical equation, what do formulas on the left side of the arrow represent? reactants (7-4)
In a chemical equation, what do formulas on the right side of the arrow represent? products (7-4)
Why do scientists balance chemical equations? to show that they obey the law of conservation of mass (7-4)
What are the numbers written in front of formulas to balance the chemical equations called? coefficients (7-4)
What are three things that can be increased in order to speed up most chemical reactions? temperature, concentration of substances, and surface area of substances (7-4)
What kind of changes does not change the identity of the substance? physical (7-3)
What kind of change is a state of matter change - physical or chemical? physical (7-3)
What happens to a substance during condensation? Its particles slow down, It loses energy, and changes from a gas to a liquid (7-3)
What happens to particles when thermal energy is added? they move faster and their temperature rises (7-3)
What is the temperature at which particles change from liquid to solid as they lose thermal energy? freezing point (7-3)
What is the temperature at which particles change from liquid to gas as they gain thermal energy? boiling point (7-3)
What is the change from solid directly to gas (without first becoming liquid) called? sublimation (7-3)
Which changes of state are reverses of one another? melting and freezing; condensation and boiling; sublimation and deposition (7-3)
What is the process in which one substance mixes evenly with another, such as sugar being stirred into water? dissolving (7-3)
What law could be stated in this way: "The particles that are present before a physical or chemical change are also present after the change"? the law of conservation of mass (7-3)
What kind of property is "a characteristic that can be observed without changing the identity of the matter?" physical property (7-2)
What is the term for the kind of physical property that will have a different measurement if the amount of material changes? size-dependent (7-2)
List three examples of size-dependent characteristics? mass, volume, weight (7-2)
What is the term for the kind of physical property that will have the same measurement no matter how large the sample is? size-independent (7-2)
List three examples of size-independent characteristics? density, boiling point, freezing point (7-2)
What is the term for the ability of one substance to be dissolved by another? solubility (7-2)
What is the term for both the ability of a substance to carry heat and the ability of a substance to carry electricity? Conductivity ("thermal" for heat; "electrical" for electricity") (7-2)
What is the term for "mass per unit volume?" density (7-2)
What is the term for anything that has mass and takes up space? matter (7-1)
What small particle is called "the building block of matter?" the atom (7-1)
What is the center of an atom called? nucleus (7-1)
What are the parts of an atom, and what are their electric charges? proton (positive), neutron (neutral), electron (negative) (7-1)
Which two parts of the atom are found in the nucleus? proton and neutron (7-1)
What is a sample of matter that always has the same composition called? a substance (7-1)
What are the two kinds of substance? elements and compounds (7-1)
What are the two kinds of mixture? homogeneous (evenly mixed); heterogeneous (not evenly mixed (7-1)
What kind of mixture is a "solution?" homogeneous (7-1)
Created by: gstubblefield