Write the definition of each word: (a) compound: ____________________________________________________________ ________________________________________________________________________ (b) mixture: ______________________________________________________________ ________________________________________________________________________ (c) element: ______________________________________________________________ ________________________________________________________________________ (d) atom: ________________________________________________________________ (e) molecule: _____________________________________________________________ (f) matter: ________________________________________________________________
2.
(a) How are homogeneous mixtures and heterogeneous mixtures the same? ____________ ________________________________________________________________________ ________________________________________________________________________ (b) How are homogeneous and heterogeneous mixture different? ____________________ ________________________________________________________________________ ________________________________________________________________________
3.
Use your periodic table to write down the names of three elements: __________________ ________________________________________________________________________
4.
Decide whether the following are homogeneous or heterogeneous: (a)
List three colloids: _________________________________________________________ ________________________________________________________________________
6.
What is a solvent? _________________________________________________________ ________________________________________________________________________
7.
What is a solute? __________________________________________________________ ________________________________________________________________________
8.
In salt water, what is the solute? ______________ What is the solvent? ______________
9.
In Kool-Aid, what is the solute? ______________ What is the solvent? ______________
10.
For the following, write E if it is an element, M if it is a mixture, and C if it is a compound.
11.
(a)
copper
_______________
(d)
hamburger
____________
(b)
ice
_______________
(e)
potassium nitrate
____________
(c)
air
_______________
(f)
iron
____________
Circle the correct choices and give a reason: This is made of: atoms
molecules
both
Why? __________________________________________ This is: an element