Unit 2 Review(ATOMS AND ELEMENTS) Flashcards
Adhesion
The property of sticking to other substances
chemical change
A change in matter that results in the formation of a new substance or substances
chemical property
A characteristic of a substance that describes its ability to change into a new substance or substances
Chemical reaction
The process in which a chemical change occurs
Cohesion
The property of sticking together
Combustibility
The ability of a substance to react quickly with oxygen to produce heat and light energy
Compound
A put substance made from two or more elements that are combined together chemically
Element
A pure substance that cannot be broken down into a simpler substance
Mass
The measurement of the quantity of matter in an object
Matter
Anything that has mass and volume
Mechanical mixture
A combination of our substances in which the different substances are individually visible
Medicine wheel
A First Nation and Métis way of knowing the physical world
Physical property
A characteristic of a substance that can be observed or measured
Property
A characteristic that describes a substance
Pure substance
A substance made up of only one kind of particle, with a unique set of properties such as color, hardness, boiling point, and melting point
Solution
A combination of pure substances in which the different substances are not individually visible
Suspension
A cloudy mixture in which tiny particles of one substance are held within another
Volume
A measurement of how big an object is or how much space a fluid takes up
Anything that has mass and volume is:
Matter
The state of matter where the atoms have the second lowest amount of energy is:
Liquid
Substances can have a combination of materials in one or more states:
True
Elements and compounds are examples of:
Pure substance
The state of matter with the most energy is known as:
Plasma
When things stick to other substances it is called:
Adhesion
When things stick to themselves it is called:
Cohesion
A compound is an example of what?
Pure substance
Trail mix would be an example of what?
Mechanical mixture
The difference between a mixture and a compound is….
Compounds are chemically combined
Select the type of reaction described- the sulfur is yellow.
Physical
What is the main difference between a pure substance and a mixture?
Pure substances have a definite composition while a mixture is a combination of things that are not chemically combined
What is a chemical change?
A chemical change is when one substance combines with another substance to form a new substance
Describe the difference between cohesion and adhesion, using an example.
Cohesion is when a substance is attracted to and sticks to itself while adhesion is when a substance is attracted to and sticks to something else. EX: water is attracted to water(cohesion), water is attracted to another substance(adhesion)
What are two physical changes that cooling a hot substance may result in?
Change in state(ex: liquid to solid), density
If water freezes inside of a buildings water pipes, the pipes may burst. Explain why this happens, in terms of a physical change or a chemical change
When water freezes the molecules spread out and take up more space( physical change). This causes it to take up more room and possibly burst the pipes.
What is the difference between an element and a compound?
Elements consist of a single type of atom and can’t be broken down any further while still maintaining the properties of that substance. A compound is a set of elements that are chemically bonded
Atomic mass
A generalized description of some aspect of the physical world under certain conditions
Alkali metals
Elements found in group 1 of the periodic table of elements