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Outcomes
Outcomes
Describe what an observation is.
Describe the difference between an observation, inference and hypothesis.
Distinguish between quantitative and qualitative observations.
Know how to write a hypothesis – do not use the words ‘I’, ‘me’ or ‘we’.
An observation is something we can detect with our five senses. An observation is a statement using one or more of your senses to gather info about the world; a FACT that is true to all observers.
Observations can be qualitative or quantitative
Qualitative observations describe what we observe
Quantitative observations measure what we observe
Sometimes we create scales to turn a qualitative description into a quantitative one
An inference is a statement that explains or interprets an observation.
A hypothesis is typically an "if..., then..." statement that is a testable theory based on observations.
A hypothesis should always:
explain what you expect to happen
be clear and understandable
be measurable
contain an independent and dependent variable
Scientists measure and count to gather data about the world around them.
Scientists measure and count to gather data about the world around them.
Observation: simply involves what your senses tell you about the world
Inference: can be a conclusion based on what you think is true or conclusion about something that is related to what you know is true.
Prediction: a statement about something that has not yet occurred but based on previous knowledge
Hypothesis: an educated guess that attempts to explain an observation or a guess that can be tested by carrying out an experiment to prove whether the hypothesis is right or wrong. When testing a hypothesis, it is called a scientific experiment.
Write two examples of each of these terms in your book:
Observation, Inference, Hypothesis, Quantitative observation, Qualitative observation
2. Look at the statements below and identify which are observations and which are inferences
The grass is wet
It rained last night
I heard a siren
I smell smoke
Water is a liquid at room temperature
Dinner is ready
PRACTICAL EXPERIMENT:
PRACTICAL EXPERIMENT:
Making qualitative observations using your senses.
Making qualitative observations using your senses.
AIM: To make observations of a range objects using your five senses.
HYPOTHESIS:
MATERIALS:
METHOD:
RESULTS:
DISCUSSION:
CONCLUSION:
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