Safe Practices in the Lab
What is the primary reason for wearing safety goggles in the laboratory?
To protect the eyes from chemical splashes or flying debris.
What do we use to measure temperature?
Thermometers
What is the difference between an observation and an inference?
An observation is something you notice directly with your senses, while an inference is a conclusion or interpretation you make based on your observations.
What is the purpose of recording data during an experiment?
To document observations and measurements for analysis and future reference.
What is the difference between quantitative and qualitative data?
Quantitative data involves numbers, while qualitative data describes qualities or characteristics.
Are we allowed to sit down while we are performing an experiment? Why?
No, it's safer to stand in the lab because there are hazards like chemicals, accidents are less likely, and it's easier to respond to emergencies while standing.
What is the function of a Bunsen burner in a laboratory setting?
It is used for heating things.
If you see dark clouds in the sky, what is that an example of?
Observation. You're directly noticing the appearance of the clouds.
Describe one method for organising collected data.
Using tables, graphs, or spreadsheets to organise data into categories
If you count the number of apples on a tree, what type of data are you collecting?
Quantitative data.
Why are we not allowed to sit on the lab benches even if we aren't doing a practical that lesson?
It can be unsafe since the benches might have leftover chemicals or equipment that could cause accidents.
What do we use to measure mass?
Mass balance
When you see someone holding an umbrella, what might be an inference you could make?
You might infer that it's raining because people usually use umbrellas to shield themselves from rain.
Why do scientists repeat their experiments several times?
Scientists do experiments many times to be sure their results are right and not by accident.
If you describe the color of a flower as red, what type of data is that?
Qualitative data.
Explain why it's important to wash hands thoroughly after handling chemicals in the laboratory.
To remove any harmful chemicals and prevent injuries or accidental ingestion.
What is the function of a microscope in scientific research?
To magnify and look at small objects or organisms that are not visible to the naked eye.
If you observe that plants in a garden are wilting, what might be an inference you could make?
You might infer that the plants need water because wilting is a common sign of dehydration in plants.
What does it mean when scientists say they are "analysing" data?
Looking closely at the information collected during an experiment to find important patterns, trends, or relationships between different things, helping scientists draw conclusions from their results.
Give an example of qualitative data you might collect while observing birds in a park.
Qualitative data might include descriptions of the colors of the birds, their behaviours, or their habitats.
Why is it important to properly label chemical containers in the laboratory?
To make sure that we know what is inside the containers and how dangerous they are so they can be used and stored safely.
How should we properly handle glassware to avoid breakage in the laboratory?
Handle glassware with care, avoid sudden temperature changes, and never use chipped or cracked glassware.
You notice that your friend is wearing a jacket. Is this an observation or an inference?
Observation. You're directly seeing your friend wearing a jacket.
Why is it important to record data accurately during a scientific experiment?
It lets other scientists check our work and see if they get the same results when they do the same experiment.
Why is it important for scientists to understand the difference between quantitative and qualitative data?
It helps scientists choose the right methods for collecting and analysing data, making sure their conclusions are accurate and reliable.