LEC 1: Importance of Chemistry in Psychology

Question 1

chemical substance that is released at the end of a nerve fiber by the arrival of a nerve impulse

Answer 1

neurotransmitters

Question 2

scientific approach to problem solving

Answer 2

• observation
• hypothesis
• experiment

Question 3

defining problems by recognizing it and stating it clearly

Answer 3

observation

Question 4

proposing solutions to the problem

Answer 4

hypothesis

Question 5

deciding the best way to solve the problm

Answer 5

experiment

Question 6

study of properties of materials and the changes that materials undergo;

science that deals with the composition and properties of matter

Answer 6

chemistry

Question 7

parts or components of a sample of matter and their relative proportion

Answer 7

composition

Question 8

qualities or attributes that we can use to distinguish one sample from the other

Answer 8

properties

Question 9

form of matter that has a definite composition and distinct properties

Answer 9

substance

Question 10

combination of two or more substances in which the substances retain their distinct identities

Answer 10

mixtures

Question 11

composition of the mixture is the same throughout

Answer 11

homogenous mixture

Question 12

composed of large pieces that are easily separated by physical means

Answer 12

heterogenous mixture

Question 13

substance that cannot be separated into simpler substances by chemical means

Answer 13

elements

Question 14

substance composed of atoms of two or more elements chemically united in fixed proportions

Answer 14

compounds

Question 15

molecules are held close together and there is very little movement between them

Answer 15

solids

Question 16

atoms and molecules have more space between them than a solid does, but less than gas

Answer 16

liquids

Question 17

molecules are moving in random patterns with varying amounts of distance between the particles

Answer 17

gas

Question 18

can be measured and observed without changing the composition or identity of a substance

Answer 18

physical property

Question 19

must carry out chemical change to observe this property

Answer 19

chemical property

Question 20

occurs when a substance changes into something new

Answer 20

chemical change

Question 21

occurs when the substance changes state but does not change its chemical composition

Answer 21

physical change

Question 22

tentative explanation of certain facts that provide a basis for further experimentation

Answer 22

hypothesis

Question 23

well-established hypothesis

Answer 23

theory

Question 24

statement of natural phenomena to which no exceptions are known under given conditions

Answer 24

law

Question 25

body of matter under consideration

Answer 25

system