chemistry chapter 1

Question 1

What are the states of matter?

Answer 1

1. Solid
2. Liquid
3. Gas

Question 2

Model (Theories)

Answer 2

Based on the experiments that test hypotheses about observation shows scienific things from speculation

Question 3

The Scientific Methods Includes what type of procedures?

Answer 3

1. Observation
2. Hypothesis
3. Experiment
4. Model

Question 4

What are the properties of matter change ?

Answer 4

Physical change & physical properties

Question 5

________ error always occurs but the size of it depends on how much the user mess up

Answer 5

Random Error

Question 6

Converision Equations between Clesius & Fahrenheit

Answer 6

°F = 9/5(°C + 32) , °C = 5/9(°F - 32)

Question 7

Chemical Properties

Answer 7

Characteristics a substance shows as it changes intoa new element or substance

Question 8

Random Error

Answer 8

In the absence of systematic error, produces values that are higher & lower than actual value

Question 9

What is the freezing point in the Celsius Scale & the differece in degrees?

Answer 9

Freezes at 0° & boils at 100° (100° difference )

Question 10

An experiment contains two variables: _______ & _________, its usually a _______ experiement to measure the affects of the dependent variable

Answer 10

Independent Variable & Dependent Variable, & Controlled Experiment

Question 11

________ can be altered but _______ cant

Answer 11

Hypothesis , Experiment Results

Question 12

Physical change is caused by ______ and can be reversed by _______

Question 13

A ________ explains how phenomeon occurs where its a simplified but not an exact representation of some aspect of nature that we use to predict related phenoneon

Answer 13

Model (Theories)

Question 14

Accuracy

Answer 14

refers to how close each measuremnt is to the actual value

Question 15

Kinetic Energy

Answer 15

Is the energy due to the motion of the object

Question 16

Examples of Extensive Properites

Answer 16

Mass& Volume

Question 17

Difference between phyiscal & chemical change

Answer 17

Physical change- has the same substance before & after

Chemical change- different substance before & after

Question 18

Physical Change

Answer 18

No change in composition

Question 19

Systematic Error

Answer 19

Produces values that are either all higher or all lower than the actual value (In the device being used)

Question 20

In a ______ particles are tightly close to each other, in _______ particles are very spaced out, & in a _______ particles are closely together but have space to move

Answer 20

Solid, Gas, Liquid

Question 21

Hypothesis

Answer 21

Is a proposal made to explain an observation, where it doesnt need to be correct but testable by an experiment (If the results dont support it then it must be discarded or revised)

Question 22

Preicison(Reproducibility)

Answer 22

Refers to how close the measurements in a series are to one another

Question 23

What is the freezing & Boiling point in the Kelvin Scale & the differece in degrees?

Answer 23

Freezes at 273K & Boils at 373K (100° difference)

Question 24

________ measurements have low _______ & generally low random error

Answer 24

Accurate measurements , low systematic error

Question 25

Heat

Answer 25

Is the energy that flows from one object with higher temp to an object with lower temp

Question 26

What is chemistry

Answer 26

the scientific study of matter & its properties, the changes that matter undergoes & the energy associated with those changes

Question 27

Temperature

Answer 27

Is a measure of how hot or cold one object is relative to another

Question 28

Examples of chemical properties

Answer 28

Flammability, corrosiveness, & reactivity with acids

Question 29

Matter

Answer 29

is the stuff in the universe that has mass

Question 30

Extensive Properties

Answer 30

Are dependent on the amount of substance present

Question 31

Chemical Change(Chemcial Reaction)

Answer 31

Occurs when one or more substance are converted into one or more new substance with different compostition & properties

Question 32

Physical & Chemical changes both has a change in \_\_\_\_\_\_\_\_\_\_

Answer 32

Energy

Question 33

Energy

Question 34

Chemical Change

Answer 34

A change in composition

Question 35

\_\_\_\_\_\_\_ measurements have low \_\_\_\_\_\_; small deviations from the average

Answer 35

Precise measurements, low random error

Question 36

What is the freezing & Boiling point in the Fahrenheit Scale & the differece in degrees?

Answer 36

Freezes at 32° & Boils at 212° (180° Difference)

Question 37

The total energy an object has is the sum of its __________ & \_\_\_\_\_\_\_\_\_\_\_

Answer 37

Potential & Kinetic enegry (Mechanical Energy)

Question 38

Observation

Answer 38

The facts within our ideas, where quantitative observation is must useful because they can be analyzed to reveal trends & pieces of quantitive info are data

Question 39

Gas

Answer 39

has varying shape that takes the form if the container

Question 40

Natural law

Answer 40

When observations are made by many people and get the same results

Question 41

Intensive Properties

Answer 41

Independent of the amount og substance (Ex. Denisty )

Question 42

Solid

Answer 42

has a fixed shape that doesnt take the shape of the container

Question 43

Liquid

Answer 43

has a variety of shapes that takes the form of the but only to the extent of the liquid volume

Question 44

Physical Properties

Answer 44

Are characteristics a substance shows by itself without changing into another element (What you see when you first look at it)

Question 45

Examples of physical properties

Answer 45

Color, Melting Point, Electrical conducivity, & density

Question 46

\_\_\_\_\_\_\_\_\_\_ are more stable than \_\_\_\_\_\_\_\_

Answer 46

Lower energy, Higher Energy

Question 47

Potential Energy

Answer 47

Is the energy due to the position of the object's relative to other objects

Question 48

Experiment

Answer 48

A set of prodecural steps that test a hypothesis an experiment often leads to a revised hypothesis & new experiments to test it