Physical Science chapter one study guide

34 questions for my 4th period test

What is science?

The research of the development of life and environment.

List the 2 main branches of science?

Physical & Natural science

What are two examples of each branch of natural science.

(Life,Physical,Earth) - Biological Science (botany & zoology)- Physical science (history of earth and atmosphere) -Earth science

Define technology

Technology is the application of knowledge and science

How do science and technology depend on each other?

To solve problems and make new discoveries

Define a scientific law

Newton’s law every action has a equal reaction

Define a scientific theory

An idea like ghost that haven’t been proven

What three points make a theory valid

Explainable, Repeatable, and must allow predictions

What is the difference between a quantitative and qualitative?

Quantitative is quantity

Qualitative is quality

Why are theories and laws always being tested

Because its needed for/of something to be time

Name three types of models used in science

visual, math, computer

How do we use models

we use models to make a scientific object and/or event easier

Define critical thinking

critical thinking help with getting all facts before answer

Define scientific method

The general way to organized thoughts about solving scientific problems

List the steps of the scientific method

Observe,

Make questions,

Research,

Collect data,

Form hypothesis,

Test hypothesis,

Make conclusion

What is a hypothesis

A hypothesis is a idea that can be tested by observations or experiments

What is a variable

A variable is any factor that can change or doesn’t

Independent

can be changed for experiment

Dependent

change according to the independent

Constant

does not change

What is the international system of units

metric system

List two reasons scientist use SI unit

To avoid confusion

To make it easier

why do we use SI prefixes

To find out if a unit is a multiple or fraction of ten

what do the following prefixes mean Kilo, Deca, deci, Ceni, Milli

Kilo- thousand

Deca- ten

deci- one tenth

Ceni- one hundredth

Milli- thousandth

order the prefixes from small to big

Milli

Ceni

deci

deka

hecto

kilo

what are the SI unit for length, mass, volume, time

Length = M

Mass = kg

Volume = m/2

Time = T

Describe the difference between weight and mass

Mass = how much an object contains

Weight = gravitational force for a object

when is the best time to use a line graph

when smaller changes are being made

what goes on the X-axis and Y-axis

the independent variable is the x-axis (horizontal line)

the dependent variable is the y-axis (vertical line)

when is the best time to use a bar graph

to compare things things in different groups

what does a bar graph clarify

The data used

when is the best time to use a pie chart

when comparing parts

why do we write numbers in scientific notation

to make calculations/form a answer

Define significant figures

each digit of a number

Define precision

the quality/condition

Define accuracy

the state of being correct or precise