Revision for SAW test -Key words -Variables -Graphs -Tables -Planning investigations

TASK 1 - KEYWORDS Put the keywords into order in groups on your tables – they will form a group

TASK 2 - KEYWORDS Copy the key word definitions for the following into your notebooks: Reliable Valid Independent variable Dependent variable Control variable Anomalous WHAT IS A HYPOTHESIS?

Hypothesis = an idea (which you can test in an experiment) The more hours you spend watching t.v, the less homework you will do. The more fizzy drinks you drink, the shorter your concentration span is. The higher height a ball is dropped from, the higher the ball will bounce.

TASK 3 - VARIABLES In your groups on tables come up with the title of an experiment. Do not copy from another group as they all need to be different! E.g. An investigation to find out whether height affects the speed at which a cupcake holder falls.

Find the variables… The worse the air pollution the higher the death rate from lung cancer The more force you use to throw something the further the object will go Testing whether the angle of the slope will affect the speed of the car travelling Measuring 5 types of junk foods energy content Different amount of yeast into bread – investigating how it will affect the rise of the bread How temperature can affect the rising speed of a helium balloon The more you smoke the higher your death rate The number of times a shirt is washed affects it weight

GRAPHS DRAWING - THE RULES GRAPH PAPER PENCIL RULER LABELS UNITS TITLE

TASK 4 - GRAPHS From the examples on your desks DESCRIBE what you see from the graphs Write it down on the graphs.

TASK 5 – TABLES These are the results from an experiment where different masses were hung onto a spring. What do the results show?

TASK 6 – PLANNING Title: Investigation to show how slope angle affects the speed of a toy car Include: Title (as above) Hypothesis (what do you think will happen?) Equipment (What do you need – amounts/sizes?) Method (step by step) Risk assessment (what are the hazards?) Variables

Hypothesis What do you think? Must be testable… The steeper the angle of the slope, the faster the car will go. The small the angle of the slope, the slower the car will go.

Equipment Amounts, sizes Small toy car x 1 30cm x 20cm large piece of wood to create slope x 1 Blocks x 5 (to create angle) Stop watch x 1 Protractor x 1 Measuring tape x 1

Method Step by step what will you do…must be repeatable 1.Set up the slope using the wood and blocks 2.Measure the angle of the slope and record 3.Hold the toy car at the top of the slope 4.Let go of the car and start the stop watch at the same time 5.As soon as the car reaches the bottom of the slope, stop the stop watch and record the time 6.Add another block to increase the angle of the slope 7.Record the angle 8.Repeat the experiment for each angle 5 times 9.Record the speed for each using the equation distance/time 10.Find the average for each angle

Risk Assessment What could harm you? How will you prevent this? HazardPrevention Heavy equipment falling on feet Stepping on car and falling over Ensure equipment is set up away from the edge of the table Ensure the toy car is not left in the middle of the floor

Variables Controls -Type/Size of car -Surface on the slope must be the same each time -Person letting go of car -Person timing speed of car Independent -Angle of the slope (degrees) Dependent -Speed of the car (m/s)