CIE iGCSE Co-Ordinated Science P2.1.1 States of matter Exam Style Questions Paper 3
Question
(a) An electric heater is used to heat a classroom in a school.
The arrows on Fig. 12.1 show the circulation of air around the classroom.
P and Q are two positions within the air circulation.
Complete the sentences using words from the list.
conduction convection cooled radiation warmed
Position P shows ………………………………. air.
Position Q shows ………………………………. air.
This method of thermal energy transfer is called ………………………………. .
(b) In the classroom, a student draws diagrams to represent the three states of matter.
Fig. 12.2 shows the diagrams drawn. Box X shows the arrangement of particles in a solid.
Box Y shows the arrangement of particles in a liquid.
(i) In box Z, draw the arrangement of particles in a gas.
(ii) Complete the sentences below using only the words solid, liquid and gas.
Solidification occurs when a …………………………….. turns into a …………………………….. .
Condensation occurs when a …………………………….. turns into a …………………………….. .
(iii) State the melting point and the boiling point of water at standard atmospheric pressure.
melting point = ……………….. °C
boiling point = ………………… °C
(c) In another lesson, the student builds an electric circuit.
Fig. 12.3 shows the circuit diagram.
(i) State the name of the components represented by the symbols in Table 12.1.
(ii) When there is a potential difference of 6V across the lamp, a current of 0.3A passes through the lamp.
Calculate the resistance of the lamp.
resistance = …………………………………………….. Ω
▶️Answer/Explanation
Ans: 12(a) cooled ;
warmed ;
convection ;
all correct ;
12(b)(i)
random arrangement and widely spaced ;
12(b)(ii) liquid and
solid ;
gas and
liquid ;
12(b)(iii) 0 °C and 100 °C ;
12(c)(i) ammeter ;
voltmeter ;
12(c)(ii) R = V ÷ I (symbols or words) or 6 ÷ 0.3 ;
R = 20 (Ω) ;
Question
(a) Solids, liquids, and gases have different properties.
Draw two lines from each state of matter to link to two correct properties of matter.
You may draw lines to each property of matter once, more than once, or not at all.
One line has been drawn for you.
▶️Answer/Explanation
Solid: Difficult to compress and fixed shape.
Liquid: Difficult to compress and able to flow.
Gas: Easily compressed and able to flow.
(b) When a liquid is heated, it expands.
(i) Describe how the structure of a liquid-in-glass thermometer is designed to make use of this property.
(ii) When a liquid is heated to a high enough temperature, it starts to boil. State the meaning of the term boiling point.
▶️Answer/Explanation
(i) The liquid is held in a narrow tube. As it is heated, the liquid expands and rises up the tube. The temperature is read from the scale marked on the tube.
(ii) The temperature at which a liquid turns into a gas.
(c) Some materials conduct thermal energy well, and other materials are better thermal insulators.
Complete Table 6.1 by placing a tick (✓) in the correct column for each material.
| Material | Thermal Conductor | Thermal Insulator |
|---|---|---|
| Aluminium | ||
| Copper | ||
| Plastic | ||
| Steel | ||
| Wool |
▶️Answer/Explanation
Aluminium: Thermal Conductor (✓)
Copper: Thermal Conductor (✓)
Plastic: Thermal Insulator (✓)
Steel: Thermal Conductor (✓)
Wool: Thermal Insulator (✓)
(d) State the name of the process that transfers thermal energy from the Sun through the vacuum of space.
▶️Answer/Explanation
Radiation.
(e) (i) Complete the sentence to describe sound waves.
Sound waves transfer …… without transferring matter.
(ii) State the approximate range of audible frequencies for a healthy human ear.
(iii) The pitch and loudness of a sound wave are increased.
State how the amplitude and the frequency of the sound wave change.
▶️Answer/Explanation
(i) Energy.
(ii) From 20 Hz to 20,000 Hz.
(iii) Amplitude increases and frequency increases.