FINAL EXAM: review packet #1

Question 1

The orderly process used for solving problems and investigating the world is the

Answer 1

scientific method

Question 2

An observation is

Answer 2

made using one or more of your five sense

Question 3

An inference is

Answer 3

made using an educated guess to describe your observation

Question 4

what is the stuff collected in experiments through observations and measurements

Answer 4

data

Question 5

what is a variable in an experiment

Answer 5

the part of the experiment that is being tested or changed

Question 6

why do people use diagrams and tables and graphs and such

Answer 6

to organize data

Question 7

first step in a research project

Answer 7

asking a question

Question 8

what part of the meniscus do you measure from

Answer 8

the lowest part

Question 9

how would you find the density of a REGULAR SHAPED OBJECT

Answer 9

length x width x hight = volume

Question 10

what happens to the density of an object if you cut it in half

Answer 10

the density will remain the same

Question 11

Democritus, John Dalton, JJ Thomson, Ernest Rutherford, and Neils Bohr all helped develop the

Answer 11

atomic theory

Question 12

three major categories of elements on the periodic table

Answer 12

metal, nonmetal, metalloid

Question 13

Periods on the periodic table are

Answer 13

left to right like a sentance

Question 14

groups/families on the periodic table are

Answer 14

vertical

Question 15

the atomic number is the amount of

Answer 15

protons in an atom

Question 16

how do you find the mass number of an atom

Answer 16

add the number of protons and neutrons together

Question 17

what two particles are in the nucleus of the atom

Answer 17

protons and neutrons

Question 18

electrons are found in the

Answer 18

electron cloud

Question 19

two nonmetals together form a

Answer 19

covalent bond

Question 20

a metal and a nonmetal together form a(n)

Answer 20

ionic bond

Question 21

NOBLE GASES DONT BOND SO JUST BEWARE

Answer 21

ok

Question 22

what happens in an ionic bond

Answer 22

the metal loses its electrons to a nonmetal and becomes positive, the nonmetal becomes negative after gaining the electron. OPPOSITES ATTRACT AND THEY BOND TOGETHER <3

Question 23

why do atoms gain/lose electrons in ionic bonds

Answer 23

they gain/lose electrons to have a complete set of electrons in their valance layers

Question 24

what happens to the characteristic properties of the original reactants during a chemical reaction

Answer 24

the reactants chemically react for new substances with new properties

Question 25

what was discovered because of the invention of the microscope

Answer 25

cells :)

Question 26

what organelle is the control center of the cell

Answer 26

the nucleus

Question 27

two main parts of an experiment

Answer 27

CONTROL=the part that stays the same in order to compare results w/ the variable
VARIABLE=the part that gets changed