Measurement information used to describe something is called
data
.
What two things does a measurement statement always contain?
A measurement statement always contains
a number and name for the referent unit
. The number answers the question “how much?” and the name answers the question “of what?” Thus a measurement will always tell you “how much of what.”
What is a description of how any material can be measured or observed?
Physical properties
are properties that can be measured or observed without changing the chemical nature of the substance. Some examples of physical properties are: color (intensive) density (intensive) volume (extensive)
Which measurement in the metric system is defined by using an object for a referent?
Terms in this set (40) The property of
mass
is a measure of how heavy an object is. A referent is a familiar object one can use to describe a property of a different object.
What is the English unit of volume closest in size to a liter?
One liter has a volume equal to 0.001 m
3
. The nearest unit of comparable volume in the English system is
the quart
(1.000 L = 1.057 qt).
What are examples of observations?
- A scientist looking at a chemical reaction in an experiment.
- A doctor watching a patient after administering an injection.
- An astronomer looking at the night sky and recording data regarding the movement and brightness of the objects he sees.
How can you describe a hypothesis?
A hypothesis is a
tentative statement about the relationship between two or more variables
. It is a specific, testable prediction about what you expect to happen in a study.
What are the two components of any measurement?
A measurement consists of two parts –
the amount present or numeric measure, and the unit that the measurement represents within a standardized system
.
What is called measurement?
Measurement,
the process of associating numbers with physical quantities and phenomena
. Measurement is fundamental to the sciences; to engineering, construction, and other technical fields; and to almost all everyday activities.
What is the unit of mass in SI units?
The SI unit of mass is
the kilogram (kg)
. In science and technology, the weight of a body in a particular reference frame is defined as the force that gives the body an acceleration equal to the local acceleration of free fall in that reference frame.
Can kg be used to express volume?
Measurements can be represented in either decimal or scientific notation. Scientists primarily use the SI (International System) or metric systems. We use base SI units such as meters, seconds, and kilograms, as well as derived units, such as liters (for volume) and g/cm
3
(for density).
Which of the following represents a concept of density?
Density, mass of a unit volume of a material substance. The formula for density is
d = M/V
, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.
Is liters a SI unit?
The SI unit of
volume
is the cubic meter (m
3
), which is a derived unit. Liter (L) is a special name for the cubic decimeter (dm
3
). The symbol for the liter is uppercase letter “ell” (L) is preferred to avoid the risk of confusion between the lowercase letter “ell” (l) and the number one (1).
How do you determine the last digit in any measured number?
How do you determine the last digit in any measured number?
by the tool you are using
. The last number in a measured number is always an estimated digit.
What is the mass of 1000 cm3 of water?
The mass of 1000 cm3 of water is
a kilogram
. The property of mass is a measure of how heavy an object is. The symbol “∆” is used to refer to an object's density.
