T1 BAB 3

Matter 1

The table shows four substances P, Q, R and S with different densities. Density (g cm-3) 0.24 0.92 2.70 19.23

Substances P Q R S

Which of the following will sink in water of density 1 g cm-3? A B C D

P and Q P and R R and S Q and S PMR 2005

2

Table 1 shows three types of liquid with their respective densities. Density /g cm-3 1.0 0.7 13.6

Liquid X Y Z

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

B

X

Y

Y

Z

Z X

C

D

X

Y

Z

X

Y

Z

PMR 2006

3

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

Solid

Process P

Liquid

Liquid

Process Q

Gas

Gas

Process R

Liquid

Which of the following represents P, Q and R? A B C D

P Condensation Boiling Melting Melting

Q Boiling Condensation Boiling Condensation

R Melting Melting Condensation Boiling PMR 2006

4

Table 2 shows four substances with different densities. Substances Density /g cm-3 Ice 0.9 Iron 7.9 Oil 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 B C D

Ice and oil Ice and iron Oil and mercury 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? A

P Filter the solution

B

Filter the solution

C

Stir and dissolve the mixture Stir and dissolve the mixture

D

Q Stir and dissolve the mixture Evaporate the salt solution Filter the solution Evaporate the salt solution

R Evaporate the salt solution Stir and dissolve the mixture Evaporate the salt solution Filter the solution PMR 2007

6

Which of the following is a correct example of a compound and mixture? A B C D

Compound Sea water Oxygen Air Water

Mixture Air Water Oxygen 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

gas

fruit water

________________

________________

________________

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

Gas

Solid

Liquid (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)

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. 9 8 7 6 5 4 3 2 1 0 w ater

d. e. f. g. h.

oil

chloroform

Weight of object is influenced by types of medium Weight of object is influenced by density of medium 5N The higher the density, the less heavy the object. 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.