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:

ReliableValid

Independent variableDependent variable

Control variableAnomalous

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 PAPERPENCILRULERLABELSUNITSTITLE

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 130cm x 20cm large piece of wood to create slope x 1Blocks x 5 (to create angle)Stop watch x 1Protractor x 1Measuring tape x 1

MethodStep by step what will you do…must be repeatable

1. Set up the slope using the wood and blocks2. Measure the angle of the slope and record3. Hold the toy car at the top of the slope4. Let go of the car and start the stop watch at the same time5. As soon as the car reaches the bottom of the slope, stop the

stop watch and record the time6. Add another block to increase the angle of the slope7. Record the angle 8. Repeat the experiment for each angle 5 times9. Record the speed for each using the equation distance/time10. Find the average for each angle

Risk Assessment

What could harm you? How will you prevent this?

Hazard Prevention

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

VariablesControls- 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)