These are similar to the questions that will be on the first lecture test.

1).	What does homeostasis mean? _____________________________


2).	At what temperature (Celsius) is water at its most dense? ___oC


3).	A logical consequence of a hypothesis is called a(n) :
	a) idea	   b) experiment	   c) placebo		d) prediction


4).	"Mammals" is an example of a:
	a) order	   b) family		c) phylum		d) class


5).	Which level of biological classification comes between Phylum and
	Order ?  ________________


6).	When did Darwin and Wallace first explain evolution?
	a) 1798	  b) 1859	 c) 1882	 d) 1923


7).	What is an "atom" ? ____________________________________
	________________________________________________________


8).	What is the chemical symbol for Calcium ?
	a) Na		b) C		c) Ca		d) Cal		e) K


9).	An element has atomic number of 11 and atomic mass of 23. It must 
	have  ___ neutrons in the nucleus:
	a)  11		b) 12		c) 23		d) 34		e) none of these


10).	What are two characteristics of water, apart from being cohesive, a
	good solvent, and expands when it freezes ?
	________________________________________________________


11).	Stomach acid has a pH of:
	a)  2		b) 5		c) 7		d) 9		e) 13


12).	Insects and small animals can walk on water because: ___________________________

	________________________________________________________________________________


13).	What type of chemical bond is weak ?
	a) ironic	b) covalent	c) ionic	  d) hydrogen


14).	What is the maximum number of chemical elements in living things ?
	a) 8		b)  16		c)  25		d)  4   	    e) 92


15).	Which two particles in the atom are found in the nucleus?
	_____________________________________


16).    What is meant by "base (alkali)"? __________________________________


17).   The chemical bond between hydrogen and oxygen (to form water) is called
       a ___ bond
       a) ionic         b) covalent      c) hydrogen      d) ironic


18).   Isotopes are atoms of the same element that differ in their:
       a) electrons     b) atomic number     c) protons     d) neutrons


19).   A substance that is a weak acid could have a pH of:
       a) 9.4      b) 12.7      c) 5.6      d) 1.9      e) 7


20).   The molecule HCl is commonly called: _________________________________


21).   How much does one electron weigh? ________________________________


22).   An element has atomic number 7. What type of ion will it form?
       a) 1+      b) 3+     c) 3-     d) 1-     e) 2-


23).   What is meant by "specific heat"? ____________________________________


24).   What is a "placebo"? ____________________________________________


25).   What type of radioactivity can go through paper but not metal?
       a) alpha particles      b) beta particles     c) gamma rays     d) delta rays