STD 3 Sn BI PP4 2007

8/6/2019 STD 3 Sn BI PP4 2007

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Second Semester Second Evaluation 2007

YEAR THREE SCIENCE

Name:________________ Marks: _________

(A) True or False. 14%

1. Baking powder produces bubbles when mixed with vinegar. -

( )

2. Curry powder is colourless.----------------------------------------

( )

3. Sugar dissolves in water.-------------------------------------------

( )

4. Water flows very well through clay soil.------------------------

( )

5. Garden soil is good for the growth of plants.--------------------

( )

6. Detergent is unsafe substance.-------------------------------------

( )7. Dead animals and plants will rot to make soil.------------------

( )

(B) Fill in the blanks. 14%

soil sand fire vinegar milky

clay labels layers harmful Clear

1. Sugar and salt can dissolve in __________.

2. Explosive substances should be kept away from __________.

3. Unsafe substances are __________ to us and should be handled

with care.

4. Tapioca flour forms a __________ solution with water.

8/6/2019 STD 3 Sn BI PP4 2007


5. We have to read the __________ on the containers before we

touch, smell or taste any substances.

6. Dead plants and animals will rot and become part of the

__________.

7. __________ holds lots of air but too little water.

(C) Match the symbol for unsafe substances to the correct meaning. 10%

1

.

flammable

2

.

corrosive

3

.

poisonous

4

.

explosive

5

.

harmful

(D) Circle the correct answers. 14%

8/6/2019 STD 3 Sn BI PP4 2007


1. What are the properties of sugar?

I Sour II Sweet

III Strong smell IV Dissolves in water

A. II only B. II and III only

C. II and IV only C. I , II and IV only

2. Which type of soil do earthworms like to live in?

A. stones B. sand C. garden soil D. clay

3. Soil that has the smaller space will let water to move through ____

A. faster B. slower C. more D. higher

4. Which type of soil is suitable for paddy plant?

A. clay B. sandy C. garden D. stones

5. Unsafe substances always have words such as

I Caution II Warning

III Danger IV Hello

A. IV only B. II and III only

C. II and IV only D. I , II and III only

6. Which of these is suitable for pottery making?

A. clay soil B. muddy soil

C. garden soil D. sandy soil

7. Which substance is corrosive?

A. tomato sauce B. bleach

C. paint D. shampoo

(E) Label the picture to show the materials found in soil. 12%

dead plants and animal silt sand

stones clay water

8/6/2019 STD 3 Sn BI PP4 2007


(F) Complete the table show. 16%

Substances Colour Smell (

/)

Dissolves in

water( /)

Produces bubbles when

mixed with

vinegar ( /)

Milk powder yellowis

h

( )

Salt white ( )

Sugar white ( )

Curry powder orange ( )

Chilly powder ( ) ( )

Baking powder ( ) ( )

(G) Circle the unsafe substances. 12%

insecticide mosquito coil tomato sauce bleach

8/6/2019 STD 3 Sn BI PP4 2007


milk powder cocoa powder sugar detergent

medicine orange juice fruit jam fertilizer

(H) Answer the following questions. 8%

Sally takes 3 different types of soil from difference places. She wants

to do an investigation with the soil. She pours a cup of water through

soil R, S and T. Then, she measures the water collected in each

container.

Result:

Sample of soil R S T

The amount of water

collected

10 ml 20 ml 2 ml

1. Which soil lets water flow through easily?

_____________________________________________________

_

8/6/2019 STD 3 Sn BI PP4 2007


2. Which soil does not let water flow through easily?

_____________________________________________________

_

3. Arrange the sample of soil in the correct sequence beginning with

the soil that lets water flow through very easily.

_____________________________________________________

_

4. Which soil is suitable for the growth of balsam plant?

_____________________________________________________

_

STD 3 Sn BI PP4 2007

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