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physics

is the study of matter energy and the interactions between them it helps us understand natural phenomena from motion to electricity and even the structure of atoms

Science

Is all about asking questions and finding answers scientists study everything around us from plants and animals to space and energy did you experiments make discoveries and help solve big problems without it we wouldn't have medicine electricity or even internet

Measurement

Foundational tool in physics helping us describe the world around us used in cooking driving health; ensures accuracy in science and daily ensures accuracy in science and daily tasks; it's determining an object's size length mass or other property it compares with international standards for accuracy it must yield the same result globally

Unit

Is a standard quantity used to measure physical properties

Scientific notation

Expresses very large or small numbers easily move decimal to form one non zero digit

Conversion factor

The equivalent amount of a single measurement by using the equivalent amount of unit

Accuracy

The closeness of a measurement to the true or accepted value; it combines both random and systematic error

Precision

The closest of repeated measurements to each other

Systematic error

Consistent deviation from true value often caused by equipment calibration issues

Random error

Unpredictable variations caused by observer limitations or environmental changes

Parallax error

a type of measurement error that occurs when the position of an object is viewed from different angles, causing it to appear shifted from its actual position

Significant figures

Reflects the precision of a measurement they help scientists communicate how precise and how a trustworthy a number is it's directly connected to accuracy and precision more of it usually mean higher position correctly using them can improve accuracy and calculated results

Rule 1

All non-zero digits are significant

Rule 2

All the zeros between non-zero digits are significant no matter where the decimal point is

Rule 3

Leading zeros are not significant

Rule 4

The zeros after the last non-zero number are not significant

Rule 5

Trailing zeros in a number with decimal point are significant

Infinite

Exact numbers have ___ number of significant figures

Not significant

For a number in scientific notation 10 and x are

International Organization for Standardization

ISO meaning