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IGCSEPhysics: Co-ordinated Sciences (Double Award)CIEExam Questions2. Thermal PhysicsKinetic Particle Model of Matter

Kinetic Particle Model of Matter (CIE IGCSE Physics: Co-ordinated Sciences (Double Award))

Exam Questions

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Kinetic Particle Model of Matter

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Kinetic Particle Model of Matter

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1a4 marks

Table 6.1 gives a list of statements about molecules in gases and solids.

table

Put one tick in every row to indicate whether each statement refers to a gas or a solid.

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1b4 marks

Fig. 6.1 represents a smoke particle in air. The smoke particle is moving.

molecules

Fig. 6.2 shows the path of the smoke particle and the position of the smoke particle a short time later.

molecules2
(i)
State the term given to the movement of the smoke particle.
[1]
                    
(ii)
State what the motion of the smoke particle shows about air molecules.
[3]

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2a2 marks

A student draws diagrams that represent three states of matter, as shown in Fig. 4.1.

 
Box B shows the arrangement of particles in a liquid.

       

18p3-2b

(i)
In box A, draw the arrangement of particles in a solid.
[1]
 
(ii)
In box C, draw the arrangement of particles in a gas.
[1]

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2b2 marks

Write the correct term for each change of state below each arrow in Fig. 4.2.

 

18p3-3a

Fig. 4.2

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2c3 marks

A wet beaker is in a warm room. After several hours the beaker is dry.

 
State and explain what happens to the water. Use your ideas about molecules in your answer.

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3a3 marks
All matter is made up of atoms and molecules.

 

Describe the arrangement, separation and motion of gas molecules.

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3b3 marks

The motion of smoke particles in air can be observed using a smoke cell and microscope.

Fig. 7.1 shows the arrangement.

screenshot-2022-10-20-at-10-09-23

Smoke is placed inside the glass smoke cell. Light enters from the side of the smoke cell.

A student looks through the microscope. She sees tiny spots of light moving. Each spot of light is a smoke particle.

Fig. 7.2 represents the path of a smoke particle seen in the eyepiece of the microscope.

  
screenshot-2022-10-20-at-10-10-54
(i)
On Fig. 7.2, continue the path of the smoke particle.
[2]
 
(ii)
State the term used to describe the movement of the smoke particle.
[1]

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14 marks

Extended Tier Only

Fig. 5.1 shows the apparatus used to observe the motion of smoke particles that are in the air in a box.

feb-march-2018-42-q5
Light from a lamp enters the box through a window in one side of the box. The smoke particles are observed using a microscope fixed above a window in the top of the box.
 
(i)
The motion of a single smoke particle is observed through the microscope.
 
In the circle shown, sketch the path of this smoke particle.
 
feb-march-2018-42-q5-2
[1]
 
(ii)
Explain why the smoke particle follows the path that is observed.
[3]

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2a4 marks

Extended Tier Only

Fig. 4.1 shows a smoke cell. The cell contains smoke particles and air molecules. It is lit from the side. A student views the motion of smoke particles in the cell by using a microscope.

q4a
 

Describe and explain what the student sees when viewing the smoke particles through the microscope.

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2b3 marks

Drops of water on a warm surface disappear after a short time. State the term used to describe this process. Explain the process, using your ideas about molecules.

 

name of process: ..........................................................................................................................

 
explanation: ..................................................................................................................................

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3a4 marks

Extended Tier Only

Some gas molecules are in a box at room temperature.

                            
Fig. 3.1 shows the position of some of the molecules and the direction of movement of each molecule.

cie-2020-31-5

(i)
Describe the movement of the gas molecules.
[2]
 
(ii)
Describe how the molecules exert a pressure on the walls of the box.
[2]

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3b1 mark

The gas in Fig. 3.1 is cooled. The gas turns into a liquid then into a solid.

 

State how the average separation of molecules in the gas is different from the average separation of molecules in the solid.

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4a3 marks

Describe the movement of the molecules in

 
(i)
a solid.
[1]
(i)
a gas.
[2]

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4b4 marks

Extended Tier Only

A closed box contains gas molecules.

 

Explain, in terms of momentum, how the molecules exert a pressure on the walls of the box.

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5a2 marks

Fig. 4.1 represents an atom.

0Y72BVCS_q4
Representing atoms by circles approximately the same size as in Fig. 4.1, sketch
 
(i)
on Fig. 4.2, the arrangement of atoms in a crystalline solid,
[1]
 
(ii)
on Fig. 4.3, the arrangement of atoms in a gas.
[1]
W1NIwyd~_q4a

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5b3 marks

Extended Tier Only

(i)
Describe the motion of the atoms in a solid.
[1]
 
(ii)

A sculptor makes a statue from a block of crystalline rock using a cutting tool. Explain why he must apply a large force to the tool to remove a small piece of rock.

[2]

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5c2 marks

Extended Tier Only

A helium-filled balloon in the room of a house suddenly bursts.

 

State and explain, in terms of atoms, what happens to the helium from the balloon after the balloon has burst.

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