Chapter 1 Science Word Scramble

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Question	Answer
one example of changing a substance physically is...	blending a milkshake
one example of changing a substance chemically is	burning wood
characteristic property that can help similar liquids apart is	boiling point
why might you need to study at least two or three characteristics before you can accurately identify a substance	many substances share meting points, boiling points, or other characteristic properties
sugar and salt are examples of	pure substance
substances that CANNOT be broken chemically into other substances are	elements
the measurement of the force of gravity on an object is the object's	weight
the measurement of how much matter an object contains is its	mass
the density of a block of wood with a volume of 50 cubic cm and a mass of 100 grams is	2 g/cm3
all elements are composed of extremely small particles called	atoms
the first person who came up with the idea of atoms was	Democritus
according to Dalton's theory of atoms, all atoms in the same element	are exactly alike
what did Dalton's theory of atoms say about compounds	atoms of two or more elements can combine to form compounds
a group of atoms that are joined together and act as a single unit is called a	molecule
what holds atom together in a molecule	chemical bonds
why can gold be separated easily from surrounding material	it has a high density
what technique did miners use to separate gold from sand and dirt	panning
copper can be separated from surrounding material because of its	chemical activity
in nature copper usually exists as a	compound mixed with other material
how would you calculate the density of an object	m/v
SI unit for mass is the	kilogram
pure substances formed from chemical combinations of two or more different elements are called	compounds
which type of matter consists of two or more substances that are not chemically combined	mixtures
how do liquid water, ice, and water vapor differ	they are different states of matter
which statement was not part of Dalton's theory of atoms?	all atoms are alike
Dalton's theory of atoms said that the masses of elements in a compound are always	in a constant ratio
electric current breaks the chemical bond that joins a metal and other elements in an ore in a process called	electrolysis
iron can be seperated from the oxygen in its ore by	by heating the ore in a hot, charcoal fire
statment part of Dalton's theory of atoms?	atoms of each element have a unique mass
a change that produces one or more new substances is called	chemical change
the ____ point of water is 100'C	boiling
a _____ substance is made of only one kind of matter and has definite properties	pure
an objects ___ is a measure of the force of gravity acting on the object.	weight
the density of a material is expressed as ____	m/v
smallest particle of an element is called an ___	atom
in the early 1800s, John Dalton proposed a theory including the idea that atoms ____ be broken apart	cannot
a ___ can contain just a few atoms or as many as a billion atoms	molecule
____ is a Characteristic property that enables miners to distinguish between real gold and "fools gold", or pyrite	density
in blast furnaces, iron metal separates from its ore because oxygen in the ore reacts with ___	carbon
the burning of wood is an example of ___	chemical change
characteristic temperatures at which a pure solid changes to a liquid is its ____	melting point
a ____ is formed when two or more or more substances mix together so well that they appear to be a single substance	solution
mass is the measure of the total amount of ____ in any object	matter
the units liter, milliliter, and cubic centimeters are all used to measure the ___ of an object or substance	volume
one of the first person known to develop the idea of atoms was the ancient Greek philosopher ____	Democritus
John Dalton said that the masses of the _____ in a compound are always in a constant ratio	elements
A ____ is a group of atoms that are bonded together and act as a single unit	molecule
If you slowly pour out a mixture of metallic gold, dirt, and water, the gold will sink and remain behind because of its high ____	density
Usually a ___ change is needed to release iron from the ore in which it is founf	chemical
Dissolving a spoonful of sugar in tea or coffee is an example of a ___ change	physical
boiling point and melting point are two ___ properties, which remains the same for any sample of a substance	characteristic
A ___ is a pure substance formed from two or more elements	compound
Two objects that have the same ___ will have the same weight when they experience the gravitational force of the same planet.	mass
The unit used to measure density is a unit of mass divided by a unit of ___	volume
According to Dalton's theory about matter, the ____ of the same element are exactly alike	atoms
A _____ is a force that holds the atoms in a molecule together	chemical bond
the metallic element ____ has a high density that causes it to separate from other materials during the panning process.	gold
Metallic copper can be separated from its compounds by an electric current during the process called ___	electrolysis
the smallest possible molecule is made of two ____ held together by a chemical bond	atoms
How do you find the increment on a graduate/thermometer/beaker	difference between two numbers divided by number of lines between numbers
When deciding where things belong in the beaker it goes from what to what	least dense to most dense
looks uniform	Homogeneous
you can see the individual parts	Heterogenous

Created by: 16asantiago