Making measurements

what is length

measurement between two points

what is volume

amount of space an object or substance occupies

what makes something standard

primary reference or measurement

what makes a reading precise

several readings close together when measuring the same value

what does calibrated mean

should agree closely with a standard

how do you measure a wire

laid straight close to a ruler, neatly cut ends starting at zero on a ruler

what should you consider when measuring with a ruler

that is is properly calibrated

how can you find the circumference of a cylinder

wrap a thread around it and measure the thread

how do you measure volume of a cube/cuboid

measure length, width, height then find the product

how do you find the volume of other shapes that aren’t like cubes

search its formula and measure what is needed for formula

what is measuring with displacement

using a measuring cylinder for irregular shapes

how do you measure with displacement

fill measuring cylinder 3 time larger with water, immerse object, how much water level increased is the volume

what are SI units

International System of Units

what is the SI unit for metre

m

how many metres in decimetre

0.1

how many metres in centimetre

0.01

SI unit for decimetre

dm

SI unit for centimetre

cm

SI unit for millimetre

mm

how many metres in millimetres

0.001

SI unit for micrometre

0.000001

SI unit for micrometre

µm

how many metre in Kilometre

1000

SI unit for kilometre

km

how many cubic metres in 1 cubic centimetre

0.000001

how many cubic metres in one cubic decimetre

0.001

how do you read a measuring cylinder

bottom of meniscus

what is a meniscus

curved upper surface of a liquid

what is to displace

move something to another place so water moved out the way when an object is lowered into it

what is to immerse

cover something in fluid so that the object is submerged

what method of measurement is this

measuring volume by displacement

what method of measurement is this

measuring volume of a cube/cuboid

SI unit of density

kg/m³

what is mass

quantity of matter a body is composed of

what is density

mass per unit volume or ration of mass to volume for a substance

what is weight

downward force of gravity that acts on an object because of its mass

formula for density

density = mass/volume

what is the symbol for density

ρ

what is the name of this symbol ρ

rho

where does the symbol for density originate from

the Greek language

what is the SI units for density in words

kilograms per cubic metre

which is denser? Gold or silver

gold

how do you find the density of a liquid

place measuring cylinder on balance, set balance to 0, pour liquid, calculate density

how do you find the mass

place object of a balance

what happens when you pour oil in a cup of water

sits at the top of the water because its less dense

what is this

a pendulum

what is at the end of a pendulum

plumb bob

what is an oscillation

a repetitive motion or vibration

what is a period

time it takes for one object to return to its original position

what is a plumb bob

a mass hanging from a string to define a vertical line

how do you use a pendulum to calculate the periods inbetweew

release the pendulum at a point, start a stop clock, count number of oscillations, find average for one period

what is this

analogue clock

what is this

digital clock w

what is analogue

display has hands and is often not very precise

what is digital

display shows numbers and is often precise

what determines what position you are in a race for sprinters

fraction of a second

what determines the position you are in a race for a long distance runner

nearest second