A) Name the parts labelled A-F

Here are the answers to the questions based on the diagram showing changes of state of matter:

a) Step 1: Identify the states of matter in the diagram: Solid, Liquid, and Gas. Step 2: Name the processes represented by each label:

• A: Liquid to Solid is Freezing.
• B: Solid to Gas is Sublimation.
• C: Liquid to Gas is Evaporation.
• D: Solid to Liquid is Melting.
• E: Gas to Solid is Deposition.
• F: Gas to Liquid is Condensation.

b) Step 1: Identify the process labelled B, which is sublimation (solid to gas). Step 2: List three examples of substances that undergo sublimation:

• Dry ice (solid carbon dioxide)
• Naphthalene (mothballs)
• Iodine

c) Step 1: Recall the processes involved in the hydrological cycle, which describes the continuous movement of water. Step 2: Name two processes from the hydrological cycle:

• Evaporation
• Condensation

d) Step 1: Identify the temperature at which water changes from liquid to solid. This is the freezing point of water. $\text{i) Water changes to solid at } \boxed{0^\circ \text{C}}$ Step 2: Identify the temperature at which water changes from liquid to gas. This is the boiling point of water at standard atmospheric pressure. $\text{ii) Water changes to gas at } \boxed{100^\circ \text{C}}$

e) Step 1: Changes of state involve either the absorption or release of energy. Step 2: Processes like melting (solid to liquid) and evaporation (liquid to gas) require energy input (are endothermic) to overcome the intermolecular forces holding particles together. Step 3: Processes like freezing (liquid to solid) and condensation (gas to liquid) release energy (are exothermic) as intermolecular forces form, causing particles to move closer and become more ordered.