SI Units
SI Unit of Length?
Metre
What does Length mean?
Length is the distance between two points.
What is Area?
Area is a measure of the size of the surface of an object.
what is the unit of time?
Second
What is Mass?
Mass is the amount of matter that an object contains.
SI Unit of Time?
Second
What instruments can we use to measure length?
Ruler, Metre sticks, opisometers, trundle wheel
How do we calculate area?
Measure the length to the nearest cm.
Measure the width to the nearest cm.
Calculate the area by multiplying the length (l) by thewidth (w).
How can we measure time?
Stopwatch, timer
Instrument used to measure mass?
Instrument: Mass balance
SI Unit of Mass?
Kilogram
Units of Length?
Kilometres (km), Metres (m), centimetres (cm), millimetres(mm)
What are the units of volume?
The units of volume are m³, cm³, mm³.
How do we calculate density?
Mass/Volume
Units of Mass?
Kilogram (kg) and gram (g)
SI Unit of Temperature?
Kelvin
what is the error of parallax?
Looking at a measurement reading from an anglecan lead to a false measurement.
This is called the parallax error.
Instruments for finding Volume?
Graduated cylinder (liquid), ruler and metre stick (regular shaped object), and overflow can (irregular shaped object).
What are the Units for Density?
g/cm³.
What is Temperature? and what are the units of temperature?
Temperature is a measure of how hot or cold an object is.
Degrees Celsius. (°C)
The Americans use degrees Fahrenheit. (°F)
What does SI unit mean?
International System of Units, the SI system, is a standard system of measurement used around the world.
What is a vernier callipers used for?
to measure the diameter of a circular object,measure widths of solid objects.
Formula for Calculating Volume?
Volume= Length x width x height
Why does an object float?
An object floats because its density is less than the density of the liquid it is in.
What tools can we use to measure temperature?
Thermometer