KS3 Science Working Scientifically Home learning Name : _____________________________________ Class : ______________________________________ Teacher : ___________________________________ In this topic you will learn about: • The basics of planning, conducting and analysing experiments in a safe and scientific way Practical Skills: • How to use various different scientific equipment • How to make measurements • How to record your observations This topic has links to: Maths in science: • How to use units • How to calculate a mean • How to draw graphs BBC bitesize → shorturl.at/nquwJ Maths made easy → https://mathsmadeeasy.co.uk/ks3-revision/ 1
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KS3 Science
Working
Scientifically
Home learningName : _____________________________________
Class : ______________________________________
Teacher : ___________________________________
In this topic you will learn about:• The basics of planning, conducting and analysing
experiments in a safe and scientific way
Practical Skills:• How to use various different scientific equipment
• How to make measurements
• How to record your observations
This topic has links to:
Maths in science: • How to use units
• How to calculate a mean
• How to draw graphs
BBC bitesize → shorturl.at/nquwJ
Maths made easy → https://mathsmadeeasy.co.uk/ks3-revision/
1
Task 1 – Safety and equipment
In & On
Can you remember the name of each of these hazard symbols?
2. Conducting an experiment._____________________________________________________________________________________________________________________________________________________________________________________________
Safety taskUse your knowledge of the safety rules in science to highlight or underline what SpongeBob, Patrick and Gary are doing wrong!
3
Scientific equipmentUse information given about common pieces of scientific equipment to identify which pieces would be needed and the reasons why on the next page:
4
Name Picture Use
Beaker Pouring liquids
Bunsen burner Heating and burning
Gauze matPlaced on top of a tripod to support
beakers/conical flasks
Spatula Used for transferring powdered chemicals
PipetteUsed for measuring/transferring small
volumes of liquids
Heat proof
mat
Protects the desks from heat. Should be
placed underneath a Bunsen burner
Conical flaskUsed for mixing chemicals/conducting
reactions
Tripod Used for support objects over a Bunsen burner
Test/boiling
tubeUsed for mixing/heating chemicals
ThermometerUsed measuring the temperature
Measuring
cylinderUsed to measure out liquids
Experiment Equipment Reason for equipment
1. Mixing an acid
and an alkali
and checking
the temperature
change.
2. Heating 100ml
of water to 60°C
3. Separating salt
from a salt water
solution
4. Burning a
piece of
magnesium in a
Bunsen burner
5
Task 2 – Units and measurements
In & On
Rearrange the letters to find the key word
Date: / / .
6
Starter
Can you list the different things you will need to consider when
For each experiment work out the independent, dependent variables.
14
Variables - Controls
Hypothesis Control variableHow to keep it the
same
The height a ball is
dropped from
affects the height it
bounces?
The temperature of
water affects how
long it takes to
cook a piece of
potato?
The force applied
to a spring affect
the amount it
extends?
The temperature of
water affect how
much salt can
dissolve in it?
For each experiment work out the independent, dependent variables.
15
Risk assessments
The temperature of water affects how long it takes to cook a piece of potato?
Hazard Risk Control
The force applied to a spring affect the amount it extends?
Hazard Risk Control
Challenge
Can you complete a risk assessment for the lab?
Hazard Risk Control
When completing a risk assessment there are three things to consider:
• Hazards – these are what can cause harm
• Risks – these are how the hazards can cause harm
• Controls – these are how you stop/reduce the risks
Task 5 – Data and tables
In & On
Solve the maths puzzles
1.Marilou is thinking of a number x. The number is less than one hundred. If five sixths of the number is 60, what is two thirds of it?__________________________________________________________________________________________________________________________________________________________________________________________x =
2. A brick weighs one kilogram plus half of the brick. What is the weight of one brick?__________________________________________________________________________________________________________________________________________________________________________________________Full brick =
Date: / / .
17
Types of data
Continuous – Has values that can be any number
Discontinuous – Has values that are words or discrete numbers
Organise these sets of data into continuous and discontinuous.
Data Continuous Discontinuous
Which town were you born in?
How tall are you?
What is your eye colour?
What is the weight of this cake?
What is the volume of water?
What is your hand span?
What is your favourite food?
How fast can you run 100m?
1. Does the height a ball is dropped from affects the height itbounces?
2. Does the force applied to a spring affect the amount it extends?
3. Does the temperature of water affect how much salt can dissolve in it?
Results tables
Results tables are essential for recording data from experiments.
In a results table we need to record what we change and what we measure. Therefore we must include:
• Independent variable – what we change
• Dependent variable – what we measure
Complete results table for the following experiments:
Means
To calculate a mean we add all the numbers in the set then divide the answer by how many numbers we had.
Find the mean from these numbers:
1. 5,3,4
Mean = .
2. 10, 11, 1, 7
Mean = .
3. 15, 8, 7, 10
Mean = .
4. 14, 2, 4, 1, 4
Mean = .
5. 7, 8, 5, 10, 4, 2
Mean = .
6. 24, 26, 32, 17, 1
Mean = .
7. 0.2, 0.1, 0.5, 0.3
Mean = .
8. 20, 9, 3, 8, 8, 8
Mean = .
9. 17, 18, 15, 10, 8, 2, 10
Mean = .
10. 0,0,0,0,0,18
Mean = .
Task 6 – Bar charts Date: / / .
What 4 mistakes can you spot on this graph?
Mistakes
•
•
•
•
Write the numbers 0-100 along the line at regular intervals
Find 20 , 70 and 65 on your scale, mark where they are
Write the numbers 0-10 along the line at regular intervals
Find 3 , 8 , and 0.5 on your scale, mark where they are
Write the numbers 0-1 along the line at regular intervals
Find 0.1 , 0.5 and 0.85 on your scale, mark where they are
For each experiment work out the independent, dependent variables.
43
The height the ball
is dropped from
The height the ball
bounces
The temperature of
waterThe time taken for
the potato to cook
The force applied
to a spring
The amount the
spring extends
The temperature of
water
The amount of salt
which can dissolve
before saturation
Variables - Controls
Hypothesis Control variable How to keep it the same
The height a ball is
dropped from
affects the height it
bounces?
The temperature of
water affects how
long it takes to
cook a piece of
potato?
The force applied
to a spring affect
the amount it
extends?
The temperature of
water affect how
much salt can
dissolve in it?
For each experiment work out the independent, dependent variables.
44
• The type of ball
• The surface the
ball dropped onto
• How the ball is
dropped
• Use the same ball
each time
• Drop the ball in the
same place each
time
• Ensure the ball is not
thrown
• The volume of
water
• The size & shape
of the potato
• The type of potato
• Measure out the water
using a measuring
cylinder
• Cut the potato the same
each time using a ruler
• Use the same potato for
the pieces
• The type of spring
• The points on the
spring which are
measured
• Use the same spring each
time
• Measure between the
same two points on the
spring each time
• The volume of
water
• The type of salt
• Measure out the water
using a measuring
cylinder
• Use the salt from the
same tub each time
Risk assessments
The temperature of water affects how long it takes to cook a piece of potato?
The force applied to a spring affect the amount it extends?
Challenge
Can you complete a risk assessment for the lab?
When completing a risk assessment there are three things to consider:
• Hazards – these are what can cause harm
• Risks – these are how the hazards can cause harm
• Controls – these are how you stop/reduce the risks
Task 5 – Data and tables
In & On
Solve the maths puzzles
1.Marilou is thinking of a number x. The number is less than one hundred. If five sixths of the number is 60, what is two thirds of it?__________________________________________________________________________________________________________________________________________________________________________________________x =
2. A brick weighs one kilogram plus half of the brick. What is the weight of one brick?__________________________________________________________________________________________________________________________________________________________________________________________Full brick =
Date: / / .
46
Types of data
Continuous – Has values that can be any number
Discontinuous – Has values that are words or discrete numbers
Organise these sets of data into continuous and discontinuous.
Data Continuous Discontinuous
Which town were you born in?
How tall are you?
What is your eye colour?
What is the weight of this cake?
What is the volume of water?
What is your hand span?
What is your favourite food?
How fast can you run 100m?
𝟓
𝟔𝒙 = 𝟔𝟎 𝒙 =
𝟔
𝟓𝟔𝟎
𝒙 = 𝟕𝟐
𝑯𝒂𝒍𝒇 𝒃𝒓𝒊𝒄𝒌 = 𝟏𝒌𝒈
𝑭𝒖𝒍𝒍 𝒃𝒓𝒊𝒄𝒌 = 𝟐𝒌𝒈
𝑯𝒂𝒍𝒇 𝒃𝒓𝒊𝒄𝒌 + 𝒉𝒂𝒍𝒇 𝒃𝒓𝒊𝒄𝒌= 𝟏𝒌𝒈 + 𝟏𝒌𝒈
1. Does the height a ball is dropped from affects the height itbounces?
Height dropped (cm) Height bounced (cm)
2. Does the force applied to a spring affect the amount it extends?
Temperature (ºC) Time (s)
3. Does the temperature of water affect how much salt can dissolve in it?
Force applied (N) Extension (mm)
Results tables
Results tables are essential for recording data from experiments.
In a results table we need to record what we change and what we measure. Therefore we must include:
• Independent variable – what we change
• Dependent variable – what we measure
Complete results table for the following experiments:
Means
To calculate a mean we add all the numbers in the set then divide the answer by how many numbers we had.