Matter

1 The table shows four substances P, Q, R and S with different densities.

Substances Density (g cm-3)P 0.24Q 0.92R 2.70S 19.23

Which of the following will sink in water of density 1 g cm-3?

A P and QB P and RC R and SD Q and S

PMR 2005

2 Table 1 shows three types of liquid with their respective densities.

Liquid Density /g cm-3

X 1.0

Y 0.7

Z 13.6

Which of the following figures correctly shows the positions of X, Y and Z?

A

X

Y

B

Y

Z

X

C

D

PMR 2006

Z

X

Z

Y

Y

X

Z

3 The following information shows the processes of changes of state in matter.

Process P

Process Q

Process R

Which of the following represents P, Q and R?

P Q RA Condensation Boiling MeltingB Boiling Condensation MeltingC Melting Boiling CondensationD Melting Condensation Boiling

PMR 2006

4 Table 2 shows four substances with different densities.

Substances Density /g cm-3

Ice 0.9Iron 7.9Oil 0.8

Mercury 13.6 Table 2

Given that density of water is 1.0 g cm-3, which substances can float on water?

A Ice and oilB Ice and ironC Oil and mercuryD Iron and mercury

PMR 2007

5 P, Q and R are steps to separate a mixture of sand and salt.

P Q R Salt is left in the evaporating dish

Which of the following correctly represent P, Q and R?

P Q RA Filter the solution Stir and dissolve the

mixtureEvaporate the salt solution

B Filter the solution Evaporate the salt solution

Stir and dissolve the mixture

C Stir and dissolve the mixture

Filter the solution Evaporate the salt solution

D Stir and dissolve the mixture

Evaporate the salt solution

Filter the solution

PMR 2007

Solid

Liquid

Gas

Liquid

Gas

Liquid

6 Which of the following is a correct example of a compound and mixture?

Compound MixtureA Sea water AirB Oxygen WaterC Air OxygenD Water Sea water

PMR 2008

1 A student carried out an experiment to study the effect of density of the medium on the weight of object X. The readings of the spring balance after the object X was placed in water, paraffin oil and chloroform are shown in Figure 1. (PMR 2004)

FIGURE 1

Figure 1

(a) State the variables in the experiment.

Manipulated variable ______________________________

Responding variable ______________________________

Controlled variable ______________________________

(3 marks)

(b) Based on Figure 1 record the readings of the weight of object X in Table 1.

Medium Density /gcm-3 Weight of object X /N

Water 0.1 ________________________

Paraffin oil 0.8 ________________________

Chloroform 1.4 ________________________

Table 1(2 marks)

(c) Based on Table 1 draw a bar chart to show the weight of object X in the different mediums.

(2 marks)

(d) Based on the bar chart (c), what can be said about the weight of object X ?

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________(1 mark)

(e) State one inference from the experiment.

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________(1 mark)

(f) Object X was placed in solution Y with a density of 1.2 g cm-3.Predict the weight of the object X.

_______________________________________________________________________(1 mark)

(g) State the relationship between the density of the medium and the weight of object X.

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________(1 mark)

(h) Based on Table 1 and the bar chart in (c), what can you deduce about the meaning of “weight of an object”?

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________(1 mark)

2 Figure 1 shows pictures of three states of matter. (PMR 2005)

Picture 1

________________

Picture 2

________________

Picture 3

________________

Figure 1.

(a) On Figure 1, label the state of mater for each picture using the following words.

(3 marks)

(b) Base on Picture 1, 2, and 3 draw diagrams to show the arrangement of the particles in each state of matter.

Picture 1 Picture 2 Picture 3

( 2 marks)

(c) State one property to differentiate between the states of matter.

______________________________________________________________

______________________________________________________________( 1 mark)

Gas Solid Liquid

water

gasfruit

Answers

Paper 1

1. C 2. D 3. C 4. A 5. C 6. D

Paper 2

1. a. Manipulated variables: Type of medium Responding variables: Weight of object, reading of spring balance Controlled variables: Mass of object

b. i. 6N ii. 9N iii. 4N c.

d. Weight of object is influenced by types of mediume. Weight of object is influenced by density of mediumf. 5 Ng. The higher the density, the less heavy the object.h. Weight of object cganges depending in the density of medium

2. a. Picture 1: Solid Picture 2: Liquid

Picture 3: Gas b.

Picture 1 Picture 2 Picture 3

c. The arrangement of particles in matter OR The movement of particles in matter.