Unit 1

Question 1

Identify the three-way scientists can investigate the natural world

Answer 1

Observing
experiments
building a model and testing the model

Question 2

List and describe the six steps of the scientific method in order

Answer 2

State the problem 
gather info 
form a hypothesis 
test the hypothesis 
analyze data 
draw conclusions

Question 3

Explain how to proceed after completing the scientific method

Answer 3

Hypothesis is not supported

Hypothesis is supported

Question 4

Explain step 1-state the problem

Answer 4

Often written as a question

usually derived from an observation of an event or an activity that is not working

Question 5

Explain Step 2 gather information

Answer 5

Before forming a hypothesis it is useful to learn as much as possible about the background of the problem
it also may be helpful to see what others have found in their work

Question 6

Explain Step three -form a hypothesis

Answer 6

Step three -form a hypothesis

a hypothesis is a possible explanation of a problem this is made using what you know and what you gathered during step 2

Question 7

Explain step 4-test the hypothesis

Answer 7

Some hypotheses can be tested by making observations
others can be tested by building a model and relating it to real life situations
a common way to test a hypothesis is to perform an experiment

Question 8

Explain step 5-analyze data

Answer 8

An important part of every experiment includes recording observations and organizing the data into tables and graphs
this allows for accurate interpretation of the data and analysis of the observations

Question 9

Explain step 6-draw conclusions

Answer 9

Based on the analysis of your data you decide whether or not your hypothesis is supported
if yes continue to test it over and over again you must get the same result every time for the hypothesis to be considered valid
if not modify the hypothesis and repeat all steps

Question 10

Explain how to produce an experiment without bias

Answer 10

experiments without bias must
involve many trials
have measurable data
be repeatable

Question 11

What is a scientific theory

Answer 11

A scientific Theory is an explanation of things or events based on knowledge gained from many observations and investigations
it is not a guess
just because it has data supporting it does not mean it will be it will never change

Question 12

What is a scientific law

Answer 12

A scientific law is a statement about what happened in nature and what seems to be true all the time
Laws tell you what will happen but they don’t explain why or how
—an example of a law his gravity

Question 13

Explain why we need standards and units for measurement

Answer 13

A standard is an exact quantity that people agree to use to compare measurements
—if you measure without a standard using a hand for instance it would be different for me then it would be for someone with a larger hand

Question 14

Identify the systems of measure used by Americans most other countries and the scientific community

Answer 14

The English system of measurement is commonly used in the United States most other nations use the metric system a system based on multiples of 10
SI standards are universally excepted and understood by scientists worldwide

Question 15

What is the unit and symbol for length

Answer 15

Meters

M

Question 16

What is the unit and symbol for mass

Answer 16

Kilograms

Kg

Question 17

What is the unit and symbol for time

Answer 17

Seconds

S

Question 18

What is the unit and symbol for electric current

Answer 18

Ampere

A

Question 19

What is the unit and simple for temperature

Answer 19

Kelvin

K

Question 20

What is the unit and simple for amount of substance

Answer 20

Mole

mol

Question 21

What is the unit and symbol for intensity of light

Answer 21

Candela

cd

Question 22

What is the symbol and multiplying factor for kilo

Answer 22

K

1000

Question 23

What is the symbol and multiplying factor for Deci

Answer 23

d

.1

Question 24

What is the symbol and multiplying factor for Centi

Answer 24

c

.01

Question 25

What is the symbol and multiplying factor for Milli

Answer 25

m | .001

Question 26

What is the symbol and multiplying factor for micro

Answer 26

M | .000001

Question 27

What is this simple and multiplying factor for nano

Answer 27

n | .000000001

Question 28

Identify the density of water and explain its importance

Answer 28

1.0g/cm3 for an object to float it must be less dense than water if an object is more dense than water it will sink

Question 29

List the temperature including correct units of absolute zero

Answer 29

Zero on the Kelvin scale (0 K) is the coldest possible temperature also known as absolute zero

Question 30

How do you convert degrees Celsius into Kelvin

Answer 30

Kelvin temperature can be found by adding 273 to the Celsius reading

Question 31

When working with a line graph the X axis is the

Answer 31

Horizontal | Independent variable

Question 32

When working with a line graph the Y axis is

Answer 32

Vertical | Dependent variable

Question 33

What is a graph

Answer 33

A graph is a visual display of information or data

Question 34

Explain when to use a bargraph line graph or circle graph

Answer 34

A line graph can show any relationship where the dependent variable changes due to a change in the independent variable A bar graph is useful for comparing information collected by counting A circle graph (pie) is used to show how some fixed quantity is broken down into parts

Question 35

Describe different definitions of technology

Answer 35

Technology is the application of scientific knowledge of materials and processes to benefit people

Question 36

Technology can be

Answer 36

Any human made object knowledge or skills needed to operate a human made object a system of people and objects used to do a particular task

Question 37

What is a technological system

Answer 37

A technological system is a collection of the other types of technology that are combined to perform a specific function

Question 38

What are the global uses of technology

Answer 38

technological solutions in developing countries focus on supplying basic needs for families technology that would supply adequate and safe drinking water and food supplies would be valued

Question 39

What are the nationally uses of technology

Answer 39

Because the needs for survival are generally met in industrialized nations money is often spend on new technologies designed to improve the quality of life of individuals

Question 40

Identify social forces that influence technology

Answer 40

Society is a group of people that share similar values and beliefs the development of technology is affected by society and it's changing values, politics and economics people will support the development of technologies that agree with their personal values if consumers failed to buy a product companies will not continue to make that type of technology

Question 41

Identify economic forces that influence technology

Answer 41

Private foundations are organizations not associated with the government consisting of people working together for a common goal which often involves producing a new technology the federal government also allocates funds for research and development of new technologies

Question 42

Why are ethics important in science

Answer 42

Ethical issues in science pose questions and establish rules about how scientific hypotheses should be tested and how society should use scientific knowledge ethics help scientist establish standards that they agreed to follow when they collect analyze and report data

Question 43

List and describe the three major types of science, including knowing a type of scientist in that field

Answer 43

The three major types of science are: life science deals with living things earth science deals with Earth and space physical science deals with matter and energy