States of water
What is the current state of water?
In physics, a state of matter is one of the distinct forms in which matter can exist. Four states of matter are observable in everyday life: solid, liquid, gas, and plasma. Many intermediate states are known to exist, such as liquid crystal, and some states only exist under extreme conditions, such as Bose–Einstein condensates (in extreme cold), neutron-degenerate matter (in extreme density), and quark–gluon plasma (at extremely high energy).
Make
Write a program that outputs liquid state, solid state or gaseous state depending on the temperature of water in °C.
Use this boilerplate code as a starting point:
Success Criteria
Remember to add a comment before a subprogram or selection statement to explain its purpose.
Complete the subprogram called `water_state` so that it:
- Returns solid if the temperature is less than or equal to zero.
- Returns liquid if the temperature is greater than zero but less than one hundred.
- Returns gaseous if the temperature is greater than one hundred.
Complete the `main program` so that:
- The user can input the temperature in degrees centigrade.
- It outputs the state of the water.
Typical inputs and outputs from the program would be:
Enter the temperature in °C: 20
The water is in a liquid state.
Enter the temperature in °C: -8
The water is in a solid state.
Enter the temperature in °C: 106.89
The water is in a gaseous state.
Knowledge Organiser
Use these resources as a reference to help you meet the success criteria.
Programming guide:
Flowcharts:
Parsons:
Evaluate
Run the unit tests below to check that your program has met the success criteria.
Enter the temperature in °C: -12.5
The water is in a solid state.
Enter the temperature in °C: 7
The water is in a liquid state.
Enter the temperature in °C: 160.459
The water is in a gaseous state.
Check that you have:
- Used comments within the code to describe the purpose of subprograms and conditions.
- Used meaningful identifier names. That means the names of subprograms and variables indicate what they are for.
