What happens to metals when they are a) heated and b) cooled?
Expansion happens when an object or material increases in size. Contraction occurs when an object or material decreases in size. Temperature and pressure can cause materials to expand or contract.
Expansion and Contraction
Expansion: when particles in metals get excited and create small spaces increasing the size Contraction: when particles in metals get less excited and pack closer together decreasing the size
What is the process called when a substance expands due to an increase in temperature?
- Thermal expansion
- Thermal contraction
- Thermal equilibrium
'Contraction' is defined as:
- The process of getting smaller
- The process of getting bigger
- Maintaining a constant size
Complete the diagram to show the particals expanding
Complete the diagram to show the particals contracting
Brain break: Draw a monster made up of different shaped fruits and vegetables.