7A Being a Scientist
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Why must you never enter the laboratory without a member of staff present?
In case there is something dangerous in the lab
What is a hazard?
Something that can harm you
What does minimise mean?
To reduce
What is a symbol?
A letter or picture which represents something
Why are symbols useful?
They can be understood regardless of language
What do you think flammable means?
Catches fire easily
Why do you think one of the symbols is a skull and bones?
It shows it is toxic – it can kill you
What might oxidising mean?
Adding oxygen
What might be the difference between a concentrated and dilute acid?
Dilute acid has more water and is usually less dangerous
What is a hazard?
Something that can cause harm
Define the term risk factor.
How likely it is that a hazard will cause harm
What is an emergency procedure?
What you should do if something goes wrong
What is a risk?
The harm a hazard can cause
Name a hazard associated with mixing chemicals.
Splashing into your eye or onto your skin
Name a risk associated with using acids.
Can burn or irritate the skin or eyes
Describe the safety precautions for using glassware.
Do not use if chipped, place in middle of bench, place test tubes in test tube rack
Describe the emergency procedure if you spill acid on your skin.
Wash immediately, then tell teacher
What is a microscope?
An instrument which allows us to see very small objects, like cells
Name 2 pieces of scientific glassware.
Beakers, conical flasks, test tubes, stirring rod
What piece of equipment should be used if you only need to react a small amount of a chemical?
Test tube or boiling tube
What piece of equipment should be used if a solution needs to be plugged?
Conical flask
What is the function of a Bunsen burner?
To heat chemicals
Why do scientists use scientific diagrams?
To represent equipment needed and how to set it up for an experiment
What should be used to draw a scientific diagram?
Pencil