19 terms

Purposeful Design Science Level 5 Chapter 6

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substance
a single kind of matter that is pure and possesses a specific set of properties
physical property
a characteristic of matter that can be observed or measured without changing the type of matter
physical change
an event that alters the form or size of matter but does not change the type of matter
chemical bond
the force of attraction that holds atoms together within a molecule
van der Waals force
a weak bond that holds two or more molecules together
mixture
combination of two or more substances that can be physically separated
solution
a type of mixture of two or more substances that are evenly distributed
soluble
able to be dissolved in a given solvent
insoluble
unable to be dissolved in a given solvent
chemical change
an event that rearranges chemical bonds and forms one or more new substances with different properties
chemical property
a characteristic that describes when or how a substance will interact with other substances
combustibility
the ability to burn
nuclear change
an event that greatly alters the nucleus of an atom
Atoms are rearranged during what kind of change?
chemical change
Breaking bonds between molecules is what kind of change?
physical change
This type of change only changes the form or size of matter?
Physical
This type of change forms new substances with different properties without changing individual atoms?
Chemical
This type of change forms different elements?
Nuclear Change
Melting, freezing and dissolving are all examples of what kind of change?
Physical