What is a solid?

The video explains the characteristics of solids, which include having a fixed shape and volume. Solids only change shape when an external force is applied, such as heating or cutting. Unlike gases or liquids, solids have tightly packed molecules, making them incompressible. The video uses examples like a gold bar, a China teacup, and pizza dough to illustrate these properties. It emphasizes that while the shape of a solid can change, its volume remains constant unless consumed.

Which of the following is NOT a characteristic of a solid?

• Cannot change volume

• Changes shape without external force

• Remains stationary once placed

• Has a fixed shape

What happens to the volume of a solid when it is placed in a different position?

• It becomes zero

• It remains the same

• It decreases

• It increases

How does the volume of a parachute change when it is not in the air?

• It decreases

• It becomes zero

• It increases

• It remains constant

Why can't a solid be compressed into a smaller space?

• Because it has tightly packed molecules

• Because it can change volume

• Because it is always in motion

• Because it has a fixed shape

What is the only way to reduce the volume of a pizza?

• By eating it

• By rolling it thinner

• By squashing it

• By cutting it