Chapter 1: The Scientific Endeavour Flashcards
How do you know if something is qualitative data?
We use our senses - sight, hearing, touch, smell and taste - to make observations. Also, it’s usually descriptive. (E.g. heavy, long, fast, etc.)
How do you know if something is quantitative data?
It involves senses and measurements taken using instruments or it can be numerical. (E.g. 500g, 2 cm, 50 seconds, etc.)
Scientific knowledge must be based on evidence and not imagination or feelings. Is this true or false?
True
Scientific knowledge should only be changed when ___________.
A. The majority of people say so
B. A well-known scientist presents new evidence
C. The scientific community agrees to the claim after new evidence is found
C is the answer.
What are the 9 hazardous labels called?
- Corrosives (the one that has two tubes pouring from different directions)
- Harmful/irritant (the sign is an exclamation mark)
- Environmental toxicity (the sign that has a fish)
- Oxidising substance (the sign that has a circle on fire)
- Gases under pressure (an alcohol looking bottle)
- Acute toxicity (death skull)
- Explosives (literally exploding sign)
- Flammable (fire)
- Aspiration hazard (human with some chains on their chest)
What are some common scientific instruments?
Measuring cylinder, electronic balance, digital calipers, digital stopwatch, and a thermometer.
Dangers of corrosives
May cause severe damage on contact with body parts
Dangers of harmful/irritant
-can lead to irritation, allergic reactions or inflammation of the skin, eyes, nose or respiratory system
- may cause drowsiness and dizziness
-harmful health effects
- cause harm to ozone layer
Danger of environmental toxicity
Has potential to cause harmful effects on the environment
Danger of oxidising substances
Releases oxygen easily which can cause fire and/or explosion
Dangers of gases under pressure
Stored in pressurised cylinders
May explode when heated
May cause oxygen deficiency if gas is leaked in an enclosed space
Acute toxicity dangers
Cause toxic or harmful effects to body when breathed in, swallowed, or on contact with skin
Degree of exposure and toxicity can affect level of health implications
May be fatal
Explosives danger
Cause fire, explosion
Explosion on contact with heat
Flammable dangers
Highly flammable.
Cause fire or produce poisonous gas when reacted with air, water, or chemicals.
Dangers of aspiration hazards
Can cause breathing difficulties
Can cause infertility, birth defects, damage to organs or cancer
