Properties can be counted. Conservation of number- the number of objects does not change with the position of the objects.

Length of an object does not change when its position is changed or its shape is altered by bending. Conservation of length.

Objects can be used to compare other objects.

Measurement is a way of detecting change.

Time is the measurement of years divided into seconds, minutes, hours, days, weeks, months, decades, centuries.

Linear measurement is the distance between two points.

Volume is the measurement of space an object occupies.

Area measures the surface of an object.

A standard unit of measurement helps communication.

When the thermometer goes up the temperature is hotter.

Measurement helps in making better observations.

Scales measure mass and weight.

Measuring cups measure volume

Measurements can be compared.

Measurement is used in everyday life (recipes, plans, designing, building)

Properties and change of properties can be quantified.

All measurement is relative to a unit, usually a standard unit.

Scale is proportional.

Measurement helps in making more accurate observations.

Quantitative estimates of familiar lengths, weights, and time intervals can be confirmed by measurement.

Mass does not change when the shape or position of an object is changed. Conservation of mass.

Volume of a substance does not change when its shape does. Conservation of volume.

Measurement helps in making better observations.

Rulers are used to measure linear measurement.

Scales measure mass and weight

Measuring cups measure volume

Measurements can be compared

Measurement is used in everyday life (recipes, plans, designing, building)

Rate is based on time

Standard units include:
Time is measure in units of seconds, minutes, hours, days, weeks, months, years, decades, centuries. Time is used to order events. Twenty-four hours in a day, about 30 days in a month, 365 days in a year, 52 weeks in a year, 12 months in a year. Calendar is used to measure time. Clocks are used to measure time. Clocks can be analog and digital. A day is divided into daytime and nighttime. Time is determined by Earth's movement. Time is cyclic (seasons, days of weeks, months).

Volume standard units are ml, liter, cup, pint, quart, gallon

Mass standard units are g, kg, pounds, ounces, tons

Linear measurement standard units are cm, m, km, inch, foot, yard, mile

Temperature measures hot and cold. Degrees in Celsius and Fahrenheit are standard units of temperature

All measurement has error.

Scale is a proportional relationship of characteristics, properties, or relationships within a system as its dimensions are increased or decreased.

Rate involves a measure of change for a part relative to a whole (birth rate as part of population growth and comparing one measured quantity to another measured quantity (km per hour).