Chapter 4 - The Variety Resources On Earth

Chapter 4 - The Variety Resources On Earth

1. Diagram 1.1 shows three pictures of different substances, P , Q and R .

P water

Q

R air

Iron nail

Diagram 1.1 ( a ) ( i ) On Diagram 1.1, label the substance P , Q and R with the following words.

Mixture

Compound

Element ( 3 marks )

(b)

Based on Diagram 1.1 above , state one example of substances Q and R. i.

Substance Q

: ……………………………………………………………….

ii.

Substance R

: ……………………………………………………………… ( 2 marks )

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( c ) ( i ) Match the pictures in Diagram 1.1 with their arrangement of particles. Arrangement of particles

Picture

Diagram 1.1 ( 3 marks )

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ii. Diagram 1.2 shows a picture of a beaker of water.

Diagram 1.2 Water is a compound. Which of the following is a method to separate the composition of water ? Tick ( √ ) in the box provided.

( 1 mark )

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2.

Diagram 2.1 shows three pictures of different substances, M , N and O .

N

M

O

water soil

Iron nail

Diagram 2.1 ( a ) ( i ) On Diagram 2.1, label the substance M , N and O with the following words.

Mixture

Compound

Element ( 3 marks )

( ii ) Based on Diagram in 2 ( a ) ( i ) , what is the method to separate substance M ? ……………………………………………………………………

( 1 mark )

( b ) Diagram 2.2 shows pictures of iron nail.

Diagram 2.2 An iron nail is a metallic substance. State one characteristic of metallic substance. ……………………………………………………………………………………. ( 1 mark )

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(c)

Diagram 2.3 shows the arrangement of the particles of substances K and L.

K

L

Diagram 2.3 ( i ) On Diagram 2.3 , label the substance K and L with the following words.

Compound

Element ( 2 marks )

( ii )

Based on Diagram 2.3 above , state one example of substances K and L. ( i ) Substances K : ………………………………………………………….. ( ii ) Substances L : ………………………………………………………….. ( 2 marks )

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3.

Diagram 3.1 shows the models of four substances P , Q , R and S.

P : _______________________

Q : ________________________

R:

S : ______________________

________________________ Diagram 3.1

( a ) On diagram 3.1 ,label the substances P, Q, R and S with the following words.

Oxygen

Iron oxide

Carbon dioxide

Sulphur

( 4 marks ) ( b ) State what is element. ……………………………………………………………………………………… ……………………………………………………………………………………… ( 1 mark )

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( c ) Draw lines to match substances P ,Q, R and S to their various forms in nature.

P

Elements

Q Compounds

R Mixtures S

( 2 marks ) ( d ) State two examples of mixture. i.

………………………………………………………………………………….

ii.

…………………………………………………………………………………. ( 2 marks )

( e ) State one method to separate a mixture. ………………………………………………………………………………………… ( 1 mark )

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4. Diagram 4.1 shows a substance classification chart.

Diagram 4.1 ( a ) What is represent Q ? ……………………………………………………………………………….. ( 1 mark ) ( b ) Give an example of P: …………………………………………………………………………… R: …………………………………………………………………………… (2 marks) ( c ) Give one characteristic of R ? ………………………………………………………………………………… ……………………………………………………………………………….. ( 1 mark ) ( d ) Draw in diagram 4.2 to show the differences between P and Q.

P

Q ( 2 marks )

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5.

Diagram 5. ( a ) Based on diagram 5 above, classify K,L,M and N in the table below

Table Compound Elements of single atoms Elements made of molecule Mixture of two compounds

Representation

( 4 marks ) ( b ) State the difference between a mixture and a compound ………..…………………………………………………………………………. ………..…………………………………………………………………………. (2 marks) ( c ) Sugar is classified as a compound but a sugar solution is classified as a mixture. Explained why . ……….………………………………………………………………………….. ……….…………………………………………………………………………. (2 marks) ( d ) Suggest one method to separate the crude oil …………………………………………………………………………………. (1 marks )

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6.

Diagram 6 shows the apparatus used to study a physical property of some elements. Each of the element is connected across the circuit in turn and the switch is turned on. The results of the experiment are shown in Table 1.

Diagram 6 Elements P Q R S T

Observations Bulb lights up. Bulb lights up. Bulb does not light up. Bulb lights up. Bulb does not light up. Table 6

( a ) Based on your observation in Table 1, classify the elements P,Q,R,S and T into two groups.

P, Q, R,S,T

Types of element

Letters of elements

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( 4 marks ) 7.

Diagram 7 shows several pictorial representations of elements, compounds and mixtures. Each circle represents a type of atom. Two atoms are bounded together if they touch one another.

K

L

M

N

Diagram 7 ( a ) Based on the labels in Diagram 7, classify the pictorial representations K, L, M and N in Table 7.

Label

Representation

Element of single atoms Element made of molecules Compound Mixture of two compounds ( 4 marks )

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( b ) What is the difference between a compound and a mixture? …………………………………………………………………………………… …………………………………………………………………………………… (2 marks) ( c ) Explain why sugar is classified as a compound but a sugar solution is classified as a mixture.

…….………………………………………………………………………………… …….………………………………………………………………………………… (1 mark) ( d ) Suggest a method of separating the a mixture of sulphur and iron fillings. ……………………………………………………………………………………. (1 mark)

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8. Diagram 8 shows an experiment to study the properties of a mixture and a compound containing the same elements.

Diagram 8

(a)

What will you observe when a magnet is placed close to the mixture of iron fillings and sulphur in (A)? ……………………………………………………………………………………. (1 mark)

( b ) i. Is the observation the same as (b) when a magnet is placed close to the iron filings and sulphur that was heated in (B)?

……………………………………………………………………………..

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ii.

What inference can you make from the observation in (c) i? …………………………………………………………………………… (2 marks)

(c)

Write a word equation to show the reaction which takes place when heating a mixture of iron fillings and sulphur. ……………………………………………………………………………………. (1 mark)

( d) Name two compounds that are found in your surroundings. 1. ………………………………………………..…………………………………… 2. …………………………………………………………………………………….. (2 marks)

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