(ii) Give two differences between solid and liquid states of matter. Define the following: (i) humidity, (ii) eclipse. (b) A box of weight 200 N is pushed through a distance of 8 m. Calculate the work done. (c) State three differences between a physical change and chemical change.

Here are the answers to the questions:

(ii) Give two differences between solid and liquid states of matter.

SOLIDS	LIQUIDS
Have a definite shape and volume.	Have a definite volume but no definite shape (take the shape of their container).
Particles are tightly packed in fixed positions.	Particles are closely packed but can move past each other.
Are generally incompressible.	Are nearly incompressible.
Have strong intermolecular forces.	Have weaker intermolecular forces than solids but stronger than gases.

2. (a) Define the following:

(i) humidity:
Humidity is the concentration of water vapor present in the air. It indicates the likelihood of precipitation, dew, or fog.

(ii) eclipse:
An eclipse is an astronomical event that occurs when an astronomical object is temporarily obscured, either by passing into the shadow of another body or by having another body pass between it and the viewer.

2. (b) A box of weight $200\,N$ is pushed through a distance of $8\,m$. Calculate the work done.