IB MYP Integrated Sciences e-Assessment : Types of fuels
Exam Style Practice Questions - New Syllabus
Question

The Kit Kat, which contains food (chemical) energy, is changed into kinetic energy.
Kit Kat chemical energy \( \longrightarrow \) kinetic energy
▶️ Answer/Explanation
1. Types of energy in the story
• heat energy
• chemical energy
• sound energy
• gravitational potential energy
• kinetic energy
These are the energy types named or described in the story. “Movement energy” is the same as kinetic energy.
2. Sources of energy in the story
• petrol in the bus
• Kit Kat / food
• batteries in the stereo
• the girls at the top of the slope / height of the slope
• the bus engine
These are the things that provide or store the energy.
3. Source \( \rightarrow \) type of energy diagrams
• petrol chemical energy \( \longrightarrow \) kinetic energy of the bus
• petrol chemical energy \( \longrightarrow \) heat energy from the engine
• Kit Kat chemical energy \( \longrightarrow \) kinetic energy of the girls moving
• batteries chemical energy \( \longrightarrow \) sound energy from the stereo
• gravitational potential energy at the top of the slope \( \longrightarrow \) kinetic energy as they ski down
A small extra note: one source can give more than one output. For example, petrol gives useful movement but also releases heat.
4. Example list of energy used today
• electrical energy for lights
• chemical energy from food
• sound energy from speakers or phone
• kinetic energy when walking or running
• thermal energy from hot water or cooking
Example diagrams for part 4
• food chemical energy \( \longrightarrow \) kinetic energy when walking
• electrical energy \( \longrightarrow \) light energy from a lamp
• electrical energy \( \longrightarrow \) sound energy from headphones
• gas / fuel chemical energy \( \longrightarrow \) thermal energy when cooking
