A generalized mental image of an object is...
a concept
The best example of the use of referent is...
big as a dump truck
A well-defined and agreed-upon referent used a standard in all systems of measurement is called...
a unit
The system of measurement based on referents in nature, but not with respect to human body parts, is...
the metric system
A process of comparing a property to a well-defined and agreed-upon referent is called...
a measurement
One of the following is not considered to be a fundamental property...
weight
How much space something occupies is described by its...
volume
The relationship between two numbers that is usually obtained by dividing one number by the other is called...
a ratio
The ratio of mass per volume of a substance is called its...
density
After identifying the appropriate equation, the next step in correctly solving a problem is to...
solve the equation for the variable in question
Suppose a problem situation describes a speed in km/h and a length in m. What conversion should you do before substituting quantities for symbols? Convert
km/h to m/s
An equation describes a relationship where
the numbers and units on both sides are equal
The equation p= m/v is a statement that
describes a property
Measurement information that is used to describe something is called
data
If you consider a very small portion of a material that is the same throughout, the density of the small sample will be
the same
The symbol ? has a meaning of
the change in
A model is
All of the above are models.
The use of a referent in describing a property always implies
a comparison with a similar property of another object.
A 5-km span is the same as how many meters?
5,000 m
One-half liter of water is the same volume as
500 cm3
Which of the following is not a measurement?
120
What happens to the surface-area-to-volume ratio as the volume of a cube becomes larger?
it decreases
If one variable increases in value while a second, related variable decreases in value, the relationship is said to be
inverse
What is needed to change a proportionality statement into an equation?
include a proportionality constant
A proportionality constant
might or might not have a unit
A scientific investigation provides understanding through
experimental evidence
Statements describing how nature is observed to behave consistently time after time are called scientific
laws
A controlled experiment comparing two situations has all identical influencing factors except the
experimental variable
In general, scientific investigations have which activities in common?
collect observations, develop explanations, test explanations
Quantities, or measured properties, that are capable of changing values are called
variables
A proportional relationship that is represented by the symbols a? 1/b represents which of the following relationships?
inverse proportion
A hypothesis concerned with a specific phenomenon is found to be acceptable through many experiments over a long period of time. This hypothesis usually becomes known as a
scientific law.
A scientific law can be expressed as
all the above
The symbol ? has a meaning of
is proportional to
Which of the following symbols represents a measured property of the compactness of matter?
?
A candle with a certain weight melts and the resulting weight of the wax is
the same
An ice cube with a certain volume melts and the resulting volume of water is
less
Compare the density of ice to the density of water. The density of the ice is
less
A beverage glass is filled to the brim with ice-cold water (0�C) and ice cubes. Some of the ice cubes are floating above the water level. When the ice melts, the water in the glass will
stay at the same level
What is the proportional relationship between the volume of juice in a cup and the time the juice dispenser has been running?
direct
What is the proportional relationship between the number of cookies in the cookie jar and the time you have been eating the cookies?
inverse
A movie projector makes a 1 m by 1 m image when projecting 1 m from a screen, a 2 m by 2 m image when projecting 2 m from the screen, and a 3 m by 3 m image when projecting 3 m from the screen. What is the proportional relationship between the distance fr
square
A movie projector makes a 1 m by 1 m image when projecting 1 m from a screen, a 2 m by 2 m image when projecting 2 m from the screen, and a 3 m by 3 m image when projecting 3 m from the screen. What is the proportional relationship between the distance fr
square
According to the scientific method, what needs to be done to move beyond conjecture or simple hypotheses in a person's understanding of their physical surroundings?
conduct a controlled experiment