Why can density be used to identify substances?

BC each substance has a characteristic density

What advantage does the Kelvin scale have over the Celsius and Fahrenheit scales for scientific work?

Which are needed for scientific equations and laws.

Why does scientist use scientific notation?

It gives a shortcut to extremely large and extremely small numbers

Closeness of a measurement to the quantity’s actual value

How closely several measurements are to eachother

Why is it important for scientist to use standardized units?

To make measurements uniform and reasonably precise among scientists-

How many centimeters are in a meter? Grams in a mega gram?

100cm in a meter; 1,000,000g in a megagram

The standard SI units of length,volume,mass and time.

Length:meter,volume:cubic meter,mass:kilogram,time:second

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Answers

1
Why can density be used to identify substances?
BC density is a characteristic property of a substance
BC all substances have the same density
BC each substance has a characteristic density
BC density is always measured in grams per liter
2
System of measurement developed in France in the early 1790s.
British imperial system
S.I system of Units
Metric System
F.P.S System
3
System of measurement that has been universally accepted as the standard for scientific and technical purposes.
Metric system
British imperial system
S.I system of units
F.P.S system
4
What advantage does the Kelvin scale have over the Celsius and Fahrenheit scales for scientific work?
Which are not needed for scientific equations and scientific notation
Which are not needed for scientific equations and laws
Which are needed for scientific equations and scientific notation
Which are needed for scientific equations and laws.
5
Why does scientist use scientific notation?
To avoid using decimals in measurements.
To make calculations more difficult
It gives a shortcut to extremely large and extremely small numbers
To express very large or very small numbers conveniently
6
What is accuracy?
The number of significant figures in a measurement.
How closely several measurements are to eachother.
Closeness of a measurement to the quantity’s actual value
The precision of an instrument used for measurement
7
Freezing and boiling points of water on the Kelvin scale.
273.15K and 373.15K
0k and 100k
0k and 373.15K0K and 373.15K
32K and 212K
8
Three ways that volume of a solid can be measured.
Fluid displacement- can be used to find the volume of an irregular-
A,B,C are correct
Direct volume measurement-measures volume using a container-
Geometric formulas-used to find volumes-
9
What is the “language of science”?
Mathematics
Greek
Physics
English
10
What is precision?
Closeness of a measurement to the quantity’s actual value.
The precision of an instrument used for measurement.
The number of significant figures in a measurement.
How closely several measurements are to eachother
11
Why is it important for scientist to use standardized units?
To prevent collaboration with other scientists.
To increase the cost of scientific equipment.
To make their work more complicated.
To make measurements uniform and reasonably precise among scientists-
12
How many centimeters are in a meter? Grams in a mega gram?
10cm in a meter; 1,000g in a megagram
1,000 cm in a meter; 100,000 g in a megagram
10cm in a meter;100,000 g in a mega gram
100cm in a meter; 1,000,000g in a megagram
13
System of measurement commonly used in the United States today.
Metric system
British imperial system
S.I System of Units
F.P.S System
14
Temperature scale used in most nations.
Fahrenheit
Ranking
Kelvin
Celsius
15
The standard SI units of length,volume,mass and time.
Length:foot,volume:quart,mass:ounce,time:hour
Length:meter,volume:cubic meter,mass:kilogram,time:second
Length:yard,volume:gallon,mass:pound,time:minute
Length:meter,volume:liter,mass:gram,time:second

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