A container of liquid water is placed in a freezer and begins to freeze into ice at 0∘C0^\circ\text{C}0∘C. At the same time, a beaker of water is boiling at 100∘C100^\circ\text{C}100∘C on a hotplate.
What is happening to the temperature of the freezing water and what is happening to the temperature of the boiling water?
Temperature of freezing water is constant; temperature of boiling water is constant.
Temperature of freezing water is decreasing; temperature of boiling water is constant.
Temperature of freezing water is constant; temperature of boiling water is increasing.
Temperature of freezing water is decreasing; temperature of boiling water is increasing.
313 exam-style questions on CIE IGCSE Physics 2.2.3a Melting, boiling, condensation and solidification. Each one has a worked solution and a mark scheme showing where the marks go.