Module 1 Review

Question 1

What is the definition of chemistry

Answer 1

the study of matter and its changes

Question 2

What are the 3 things that chemistry studies?

Answer 2

1. the properties, composition and structure of matter
2. the changes matter undergoes
3. the energy associated with those changes

Question 3

provide one example of how chemistry is part of everything you do

Answer 3

health care field: chemistry is essential to understanding how our bodies function and how they interact with their surroundings

Question 4

What is science?

Answer 4

the methodical exploration of nature and logical explanation of the observations

Question 5

What contribution did Robert boyle contribute to the field of science?

Answer 5

Father of chemistry, stated that scientific speculation is worthless unless it was supported by experimental evidence, his ideas led to the development of the scientific method

Question 6

What is the scientific method?

Answer 6

a systematic approach to solving a problem

Question 7

differentiate between a hypothesis, theory and law

Answer 7

hypothesis- an educated guess, a prediction and untested explanation
theory- describes how or why observations happen, explains behavior
law- summarizes what happens, states a measureable relationship, does not explain why

Question 8

How to write a hypothesis

Answer 8

It is hypothesized/ predicted that…. because….

Question 9

Steps of the scientific method

Answer 9

1. question/problem
2. get educated (literature search/ preliminary experimentation)
3. Hypothesis
4. test hypothesis (experimentation)
5. draw conclusions (is the hypothesis supported/ not supported)

Question 10

What type of experimentation is utilized with the scientific method?

Answer 10

controlled experimentation- an experiment in which only 1 variable is changed at a time so the results can be directly attributed to a specific variable

Question 11

define Manipulated variable

Answer 11

the independent variable, the one variable being changed or manipulated during the experiment

Question 12

define Responding variable

Answer 12

dependent variable, the variable(s) that change as a result of the changes in the manipulated variable

Question 13

define Control variable

Answer 13

all the things kept the same in the experiment so you know the results are due to the manipulated variable

Question 14

Branches of chemistry

Answer 14

organic, inorganic, biochem and analytical

Question 15

what does organic chem study?

Answer 15

substances containing carbon

Question 16

what does inorganic chem study?

Answer 16

substances that contain little or no carbon

Question 17

what does biochem study?

Answer 17

substances that are derived from plants and animals

Question 18

What is the definition of matter?

Answer 18

something that has mass and takes up space

Question 19

what is not matter?

Answer 19

forms of energy; light, sound, heat, electrical

Question 20

why is mass the preferred quantity to measure matter?

Answer 20

because it can measure the amount of matter an object contains without being affected by gravity

Question 21

differentiate between composition and structure

Answer 21

composition- what something is made of

structure- what something is made of and how the components are arranged

Question 22

define and differentiate between an atom and a molecule

Answer 22

atoms- the fundamental units of matter

molecules- a group of atoms held tightly together

Question 23

define pure substances

Answer 23

matter with 100% constant composition, can be elements (1 type of atom) or compounds (different types of atoms chemically bonded together called elements)

Question 24

define mixtures

Answer 24

matter with less than 100% constant composition, two or more different substances physically combined together

Question 25

what are elements

Answer 25

made of only one type of atom, simplest form of matter that cannot be broken down by ordinary chemical means

Question 26

what are compounds

Answer 26

pure substances, made of different types of elements chemically bonded together

Question 27

define homogeneous mixtures

Answer 27

substances that mix uniformly, also called solutions

Question 28

define heterogeneous mixtures

Answer 28

substances that do not mix evenly and causes clustering