Identify Basic Scientific Measurements Using Laboratory Tools Flashcards
Scientists use what system to measure and record data?
Metric System or Systeme Internationale (SI)
This system uses ___ ___ and ___ to increase or decrease size
Base Units, Prefixes
The SI Base units for Mass, Length, and Time are:
Kilogram, Meter, and Second, Respectively
___ units are also used to measure Volume
SI
The Volume of a three-dimensional object has:
Length, Width, and Height are of which are measured in length units
The SI base unit for Volume is more familiarly called a:
Liter
The SI system also uses ___ to indicate the size of units
Prefixes
The prefix “Kilo” means:
1,000 so 1 kilometer is 1,000 meters
The prefix “Centi” means:
0.01, so 1 centimeter is 0.01 meters
The prefix “Hecta” means:
100
The prefix “Deca” means:
10
The prefix “Deci” means:
0.1
The prefix “Milli” means:
0.001
Length is typically measured with a:
Ruler or meterstick
Length is:
The distance from end to end of an object and is used to describe width, height, and length
Be sure to always start measuring length from the ___ point on your measuring tool
0
How is Volume measured?
In different ways, depending on the state of matter
What is Volume?
The amount of space an object takes up
The Volume of Solids can be calculated by:
The Sides can be measured using:
Multiplying the measurements of length, width, and height
Rulers or Metersticks
Several types of glassware can be used to measure the ___ of liquids
Volume
The most accurate tool in measuring Large Volumes is:
A Volumetric Flask
The most accurate tool in measuring Small Volumes is:
A Volumetric Pipette
Graduated Cylinders can also be used to measure a range of ___ in the laboratory, but they are less accurate than ___ ___ or ___
Volumes, Volumetric Flasks, Pipettes
Liquids form a ___ in a measuring tool
Meniscus
What is a Meniscus?
The curve formed at the top of a liquid in response to its container
The Meniscus Curve can be:
Upward (Concave), Downward (Convex), or Flat, depending on the properties of the liquid and the container
When measuring the Volume of a liquid, make sure that the line you are reading is:
Even with the center of the Meniscus
What are used to measure the Mass of an object?
Balances
What is Mass?
The amount of Matter in an object
What are the 2 types of Balances used to measure Mass?
The Triple-Beam Balance and Electronic Balance
What measurement of Mass is the most common? Why?
Electronic Balance because it is easier to use
Large items with a large Mass would likely be measured using:
Kilograms (kg)
It is more efficient to say a person has a mass of 75 ___ than to say a person has a mass of 75,000 ___
kg, grams
Measuring a few drops of water makes more sense in ___ than in Liters
Milliliters
For Length, small things like insects and fingernails should be measured in:
Millimeters
Objects like the width of a piece of paper can be measured in:
Centimeters
The height of a door or a ceiling should be measured in:
Meters
The distance between two towns can be measured in:
Kilometers
