property that can be observed or measured without changing the identity of the substance
physical property
100
A change in the properties of matter that does not change the substances in the matter.
physical change
100
A change in which one or more new substances are made
chemical change
100
The ability of a substance to undergo a chemical change
chemical property
100
The amount of matter in an object
mass
200
Three examples of physical properties are
size, shape, and texture (conductivity, density, solubility, melting point, boiling point)
200
True or False: Cutting, folding, and tearing are physical changes.
True
200
Name an example of a chemical change
Cooking, rusting, burning paper/wood, etc.
200
substances that can burn are
combustible
200
The amount of space that an object takes up
volume
300
What are the physical properties of an apple
red (green/yellow), round, smooth, and small
300
The total amount of matter is (the same/less than/more than) before and after a physical change.
the same
300
How does temperature affect chemical change?
Higher temperatures cause the atoms to move faster, so changes occur sooner. Lower temperatures cause the atoms to move slower, so changes take longer to occur.
300
Give two examples of chemical properties
1. being combustible 2. having the ability to rust
300
In the elevator experiment, how close or far everyone was to each other represented the elevator's ________.
density
400
You can use ___________ and ________ to observe or measure physical properties
your senses and tools
400
True or False: Changes in the state of matter are not physical changes.
False. Changing states of matter is a physical change. For example, if water freezes into ice, it is still made of water.
400
When the atoms are being rearranged in a substance, a _____________ is occurring.
chemical reaction
400
True or False: When a chemical change happens, the new substance can have different properties than the original substance.
True. For example, an iron nail has the ability to rust, but a rusty nail does not have the ability to rust because it is already rusted
400
What has a greater density, 10 g of copper or 100 g of copper?
Their densities are the same because they are made of the same substance
500
What physical properties do not change because they are independent of their size?
conductivity, melting point, solubility, density, and boiling point.
500
True or False: You can change the properties of matter without changing the substances that make up the matter.
True. For example, when I fold a piece of paper, it's volume becomes smaller, but it is still paper.
500
What are the 7 evidences that a chemical change occurred?
New substance has formed, release of heat, release of light, change of color, change of taste, and change of odor.
500
Give an example of when a chemical property is different because of a chemical change?
When you burn wood, the wood is combustible. After is is burned, it turns into ash and the ash is not combustible.
500
How do you measure the volume of an irregularly shaped object?
You place the object in a graduated cylinder and measure the amount of water that is displaced.