Open main menu
Key Stage Wiki β

Difference between pages "Measure" and "GCSE Physics Required Practical: Calculating Densities"

(Difference between pages)
(→‎Key Stage 2)
 
(→‎Improving Precision)
 
Line 1: Line 1:
−
==Key Stage 1==
+
==Key Stage 4==
 +
{{#ev:youtube|https://www.youtube.com/watch?v=lvqu6JAbaKc}}
 
===Meaning===
 
===Meaning===
−
To '''measure''' is to find out the size of something.
+
Finding the [[density]] of [[solid]] [[object]]s.
−
: [[Verb]]: '''Measure'''
 
−
: Singular [[Noun]]: '''Measuring Instrument'''
 
−
: Plural [[Noun]]: '''Measuring Instruments'''
 
−
 
 
−
===About Measuring===
 
−
: '''Measuring''' is when we find out how big or small something is.
 
−
: You can measure lots of different things about an object like how big it is, how hot it is or how quickly it moves.
 
−
 
 
−
===Examples===
 
−
: A [[scientist]] wants to find the [[height]] of a tower.
 
−
: A [[scientist]] uses a [[ruler]] to find out how [[Width|wide]] the door is.
 
−
: A [[scientist]] used a [[timer]] out how long they take to eat a sandwich.
 
−
 
 
−
===Used in a Sentence===
 
−
: A [[scientist]] will '''measure''' the height of the tower.
 
−
: A [[scientist]] '''measures''' the width of the door using a [[ruler]].
 
−
: A [[scientist]] '''measured''' the time it took to eat a sandwich using a [[timer]].
 
  
−
==Key Stage 2==
+
===Experiment 1: Cuboid===
−
===Meaning===
+
====Method====
−
To '''measure''' is to use a [[Scientific Instrument|scientific instrument]] to find the size or amount of something.
+
{| class="wikitable"
 +
|-
 +
|[[File:RequiredPracticalDensity1.png|center|400px]]
 +
| style="height:20px; width:200px; text-align:center;" |A [[diagram]] of the [[apparatus]] used in an [[experiment]] to find the [[density]] of a cuboid.
 +
|}
  
−
===About Measuring===
+
#Measure the [[mass]] of the cuboid using an [[Electronic Balance|electronic balance]] or [[Measuring Scale|measuring scale]].
−
: When you '''measure''' something you have to be careful to use your [[Scientific Instrument|scientific instrument]] carefully to get the right measurement.
+
#Measure the length, width and height of the cuboid using a [[ruler]].
−
: You must use the right tool for the job. You must use a [[ruler]] to '''measure''' height, a [[timer]] to '''measure''' time and a [[thermometer]] to '''measure''' [[temperature]].
+
#Multiply the length, width and height to calculate the [[Volume (Space)|volume]].
 +
#Use the equation <math>\rho = \frac{m}{V}</math> to calculate the [[density]] of the cuboid.
  
−
==Key Stage 3==
+
====Improving [[Accuracy]]====
−
===Meaning===
+
: Place the [[Electronic Balance|electronic balance]] on a flat, level surface to get an [[accurate]] reading of the [[mass]].
−
To '''measure''' is to use a [[Scientific Instrument|scientific instrument]] to find the size or amount of something.
 
  
−
===About Measuring===
+
===Experiment 1: Irregular Solid===
−
: When you '''measure''' something you have to be careful to use your [[Scientific Instrument|scientific instrument]] carefully to get the right measurement.
+
====Method====
−
: You must use the right tool for the job. You must use a [[ruler]] to '''measure''' height, a [[timer]] to '''measure''' time and a [[thermometer]] to '''measure''' [[temperature]].
+
{| class="wikitable"
 +
|-
 +
|[[File:RequiredPracticalDensity2.png|center|600px]]
 +
|-
 +
| style="height:20px; width:200px; text-align:center;" |A [[diagram]] of the [[apparatus]] used in an [[experiment]] to find the [[density]] of an irregular [[solid]].
 +
|}
  
−
==Key Stage 4==
+
#Measure the [[mass]] of the [[object]] using an [[Electronic Balance|electronic balance]] or [[Measuring Scale|measuring scale]].
−
===Meaning===
+
#Fill a [[Measuring Cylinder|measuring cylinder]] with enough [[water]] to submerse the [[object]].
−
To '''measure''' is to take two [[reading]]s from a [[Scientific Instrument|scientific instrument]] and find the difference between them.
+
#Take a [[reading]] of the [[Volume (Space)|volume]] of [[water]] in the [[Measuring Cylinder]].
 +
#Place the [[object]] in the [[Measuring Cylinder]] and ensure it is submersed.
 +
#Take a [[reading]] of the [[Volume (Space)|volume]] of [[water]] + [[object]] in the [[Measuring Cylinder]].
 +
#Subtract the [[Volume (Space)|volume]] of [[water]] from the [[Volume (Space)|volume]] of [[water]] + [[object]] to find the [[Volume (Space)|volume]] of the [[object]].
 +
#Use the equation <math>\rho = \frac{m}{V}</math> to calculate the [[density]] of the irregular [[object]].
  
−
===About Measuring===
+
====Improving [[Accuracy]]====
−
: To [[measure]] something the value and the start and the value at the end must be [[reading|read]] and then subtracted from one another.
+
: Ensure the [[mass]] is [[measure]]d at the start of the [[experiment]] so that the [[mass]] is [[measure]]d while the [[object]] is dry.
−
: A '''measurement''' is the difference between two [[reading]]s.
+
: Place the [[Electronic Balance|electronic balance]] on a flat, level surface to get an [[accurate]] reading of the [[mass]].
 +
: Place the [[Measuring Cylinder|measuring cylinder]] on a flat, level surface and read it from eye level to get an [[accurate]] reading of the [[Volume (Space)|volume]] of [[water]].
 +
: Ensure no [[water]] is spilled to get an accurate measurement for the [[Volume (Space)|volume]] of the [[object]].
 +
: Ensure the [[object]] is fully submerged to get the correct value for the [[Volume (Space)|volume]] of the [[object]].
  
−
===Examples===
+
====Improving [[Precision]]====
−
: The length of an [[object]] can be [[measurement|measured]] by using a [[ruler]] to take a [[reading]] at both ends of the [[object]] (eg 5.3cm and 7.6cm [[reading]]s gives a [[measurement]] of 2.3cm long).
+
: Ensure no [[water]] is spilled from the [[Measuring Cylinder|measuring cylinder]] so that all repeat readings are the same.
 +
: Measure the 'dry' [[mass]] of the [[object]] to ensure repeat readings are not affected by [[water]] permeating the [[object]].

Latest revision as of 09:19, 23 November 2019

Key Stage 4

Meaning

Finding the density of solid objects.

Experiment 1: Cuboid

Method

RequiredPracticalDensity1.png
 A diagram of the apparatus used in an experiment to find the density of a cuboid.
  1. Measure the mass of the cuboid using an electronic balance or measuring scale.
  2. Measure the length, width and height of the cuboid using a ruler.
  3. Multiply the length, width and height to calculate the volume.
  4. Use the equation \(\rho = \frac{m}{V}\) to calculate the density of the cuboid.

Improving Accuracy

Place the electronic balance on a flat, level surface to get an accurate reading of the mass.

Experiment 1: Irregular Solid

Method

RequiredPracticalDensity2.png
A diagram of the apparatus used in an experiment to find the density of an irregular solid.
  1. Measure the mass of the object using an electronic balance or measuring scale.
  2. Fill a measuring cylinder with enough water to submerse the object.
  3. Take a reading of the volume of water in the Measuring Cylinder.
  4. Place the object in the Measuring Cylinder and ensure it is submersed.
  5. Take a reading of the volume of water + object in the Measuring Cylinder.
  6. Subtract the volume of water from the volume of water + object to find the volume of the object.
  7. Use the equation \(\rho = \frac{m}{V}\) to calculate the density of the irregular object.

Improving Accuracy

Ensure the mass is measured at the start of the experiment so that the mass is measured while the object is dry.
Place the electronic balance on a flat, level surface to get an accurate reading of the mass.
Place the measuring cylinder on a flat, level surface and read it from eye level to get an accurate reading of the volume of water.
Ensure no water is spilled to get an accurate measurement for the volume of the object.
Ensure the object is fully submerged to get the correct value for the volume of the object.

Improving Precision

Ensure no water is spilled from the measuring cylinder so that all repeat readings are the same.
Measure the 'dry' mass of the object to ensure repeat readings are not affected by water permeating the object.
Retrieved from "https://keystagewiki.com/index.php?title=Measure&oldid=20397"