Scientific Method
Say the steps of the scientific method in the correct order.
1. Identifying a problem, giving an hypothesis, doing experiments, analysing the data and coming to a conclusion.
Which physical quantity is measured in L?
Volume
What’s “mass”?
The amount of matter of a body.
Which item do we use to protect your clothes in the lab?
Lab coat
Name the three laws about gases.
Boyle-Mariotte, Gay-Lussac and Charles.
Identify the step of the scientific method:
My dog doesn’t want to eat its favourite food.
Identifying a problem
Which unit in the “SI” corresponds to mass?
Kilogram
What’s “volume”?
The amount of space that a body occupies
Which item do we use to protect our eyes in the lab?
Safety goggles
Which law studies a gas when pressure is constant?
Charles’ law
Identify the step of the scientific method:
We measured the pressure and the volume of a gas at a fixed temperature. Now, we should represent pressure against volume to identify the relationship between these variables.
Analysing the data.
Which instrument do we use to measure temperature?
Thermometer
Say the density formula
density= mass / volume
What’s the name of the hazard symbol with a skull?
Acute toxicity
Write the formula corresponding to Gay-Lussac’s law.
P/T = constant
Identify the step of the scientific method:
All the objects whose density is lower than 1g/cm3 float in water.
Coming to a conclusion
Which instrument do we use to measure length?
Measuring tape
Density and volume are directly or inversely proportional?
Mass and volume are inversely proportional, that is: when volume increases, density decreases.
What does the hazard symbol “exclamation mark” mean?
It may irritate the skin, eyes or respiratory tract.
At a fixed temperature, what’s the relationship between pressure and volume? Give an example.
Pressure and volume are inversely proportional.
Identify the step of the scientific method:
I think mass and density are directly proportional
Giving an hypothesis
Which is the conversion factor between h and s?
1h=3600s
You throw a marble (d=7g/cm3) into a liquid (d=2g/cm3). Does the marble float or sink? Why?
The marble sinks because its density is higher than the liquid’s density.
If you have long hair, what should you do before entering the Science lab?
I should tie my hair back
At a fixed volume, what’s the relationship between pressure and temperature? Give an example.
Pressure and temperature are directly proportional.