Flammability is a chemical property that tells whether a substance reacts in the presence of ______________.
oxygen
100
Matter is anything that has (two things)
Matter and takes up space
200
Digesting food...
chemical
200
When two or more pure substances are blended together, the result is a _______________.
mixture
200
Lead has a density of 11.3 g/cm cubed and mass of 282.5 g. What is its volume?
25 cm cubed
200
Copper is used to make electric wire because it is a good ____________.
conductor
200
The science of what matter is made of and how it changes is called
Chemistry
300
Paint fading....
chemical
300
A mixture of flour and water is called a ____________ mixture because the substances do not dissolve. The other type of mixture is called a ______________ mixture.
heterogenous, homogenous
300
A substance has a mass of 360 g and a volume of 7.5 cm cubed. What is its density?
48 g/cm cubed
300
Tooth fillings are often made of gold or porcelain because these materials are _____________. Baking soda and vinegar are considered very ___________.
non-reactive, reactive
300
A substance that cannot be broken down into simpler substances is
An element
400
Which of the following is NOT a potential sign of chemical change?
A) evaporation of water
B) release of gas
C) production of gas
D) change of color
A) evaporation of water
400
A liquid changes rapidly into a gas at the liquid's
A) freezing point
B) boiling point
C) melting point
D) condensation point
B) boiling point
400
The chemical formula for water, H2O, means that each water molecule contains __________ hydrogens and ___________ oxygens.
2, 1
400
Sound is NOT made of matter because it has no _________ or __________.
Mass, volume
400
The smallest unit of a substance that behaves like the substance is
a molecule
500
A __________ property describes how a substance acts when it reacts with other substances. A ____________ property describes the change in the matter without changing the actual substance.
chemical, physical
500
Two or more liquids that can dissolve into each other are referred to as
miscible
500
Knowing the chemical properties of a substance will tell you how the substance
A) looks
B) can be broken down into atoms
C) reacts with other substances
D) smells
C) reacts with other substances
500
What are two indications that a chemical change has taken place?
Heat, sound, gas production, odor, color change, light
500
A substance that is made of atoms of more than one type bound together is called a