2012-13-Sci-G4-T2.docx

Rustomjee Cambridge International School and Junior College

SUBJECT: SCIENCE GRADE: IV Div.____

---Question Number 1 2 3 4 5 6 7 8 9 10 Total

Marks Obtained

Q.1)A] Fill in the blanks: (10 marks)

1. ____________________ is a product of decomposed organisms and organic waste

mostly found in the top soil.

2. All the animals directly or indirectly depend on the ________________ for their food.

3. The natural food substances that contain sugars, starches and edible fibres are together

called as ___________________________.

4. ____________________ is made by weaving together terylene and woollen fibres.

5. Soil is formed by a process called ______________________of rocks.

6. Skin disease like athlete’s foot is caused by certain ________________ growing on

human skin.

7. The outermost layer of earth is called the ____________________.

8. __________________ is the sticky layer of germs on the tooth.

9. The first few centimeters of the small intestine is called ___________________.

Name:_____________________________________________________Roll No.__________

B) Tick the correct alternative. (8 marks) 1. Sugar syrup is used to preserve these food items

a) Upma, dhokla and poha

b) Gulab jamuns, sliced pineapples, squash

c) rice, wheat and maize

2. These microbes change milk into curds a) bacteria

b) protozoa

c) virus

3. Which is the correct order?

a) food pipe stomach small intestines

b) mouth large intestines stomach

c) stomach large intestines duodenum

4. Which of the following are some important minerals that we need? a)Fats and starch

b)Carbohydrates and proteins c)Iron and calcium

5. Benzene and petrol are examples of __________________. a) Natural preservatives

b) Chemical stain removers c) Blended fibres

6. Which of the following food item is a good source of protein?

a) b) c)

√

7) These are two viral disease that affect animals. a) Distemper and foot-and-mouth

b) Mumps and polio

c) Ringworm and athlete’s foot

8) These are two natural factors that change the environment a) Deforestation and over grazing

b) Chemical fertilizers and pesticides c) earthquakes and volcanic eruptions

C) Name the following (5 marks) 1) Any two natural fibres.

Ans. a) ______________________ b) ____________________ 2) Any two methods of cooking.

Ans. a) ______________________ b) ____________________ 3) Any two bacterial diseases.

Ans. a) ______________________ b) ____________________

4. Any two natural agents of soil erosion.

Ans. a) ______________________ b) ____________________ 5) Any two layers of soil.

Ans. a) ______________________ b) ____________________

Q 2]A) Write true or false against each statement and rewrite the correct statement (4 marks)

1) CFL(Compact Fluorescent Lamp) increases power consumption. _______________ ____________________________________________________________________ 2) Ventilation is the arrangement of doors and windows for proper circulation of air.

_______________

____________________________________________________________________ 3) Exposure to incorrect temperature causes food spoilage. ____________

4) The wall of the large intestine absorbs the digested food and transfers it to the blood. _________________________

____________________________________________________________________ 5) Soil can be formed overnight. ____________________

____________________________________________________________________

B) Give reasons: (7 marks)

1. Raw mango slices dried in the sun remain without spoiling for months.

____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ 2. Eating more food than we need is harmful. (two points)

____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ 3. Lot of terrace farming is seen in the hilly regions

____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ 4. Herbivores do not have canines.

____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ 5. Frozen food items stay un-spoilt for a longer duration of time.

____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ 6. Coloured clothes should not be dried under direct sunlight.

____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________

C) Distinguish between:(write any three differences) (6 marks) 1. Canines and Molars

Canines Molars

Their shape

How are they useful

Numbers in

permanent set of teeth

Q3]A) Tom has a decay in his teeth and a foul smell is given out from his

mouth. (4 marks)

a) What has caused the foul smell/ odour in Tom’s mouth ?

____________________________________________________________________ ____________________________________________________________________ b) Tom must now visit a ________________________ for treatment, someone who

specializes in tooth care.

c) Food rich in vitamin C is good for our ( tick the correct option) i) liver ii) gums iii) lungs

d) Write two precautions Tom must take to avoid decay in his other teeth.

_____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________

B) Look at the picture and do as directed:

i) Label the parts: (2 marks)

ii) Answer the questions (3 marks) a) Which organ stores the bile juice produced by the liver? ____________________ b)From which organfecal matter thrown out of the body? _______________________ c)Name two important organs which produce digestive juice.

____________________ ______________________ d) What will happen if no salivary juice is produced in the mouth?

___________________________________________________________________ ___________________________________________________________________ Q.4]A) Observe the given pictures: (3 marks) Picture A Picture B

______________________________________________________________________ __________________________________________________________________ b) What does “degraded environment” mean?

______________________________________________________________________ ______________________________________________________________________ c) Which type of pollution is caused in the picture “A”? ______________.

B) Answer the following questions: (12 marks) 1) Why do you think there is more pollution in cities? How would this affect us?

_____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ 2) Write 2 effects of harmful bacteria.

_____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ 3) Write any two uses of soil.

_____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ 4) Rahul’s doctor suggested him to have vitamin rich food .What is the role of vitamins in

our body (any two points)

_____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ 5) Clothes play an important role in our everyday life. Explain this by giving any two

reasons

_____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________

_____________________________________________________________________ 6) Rima wants to plant a sapling. Which soil should she use and why?

_____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ Q.5]A)Which group of food substances each of them should have in more quantity ?

Choose from the options given below. (3 marks) (Strength giving food, Protective food, Energy giving food)

i)

A sick child ______________________

ii)

Labourer ______________________

iii)

Healthy bones

______________________

B) Give one word for the following: (2 marks)

a) The process in which complex food substances change into simple ones- ______________. b) The process of protecting the soil from erosion is ___________________.

c) The part of the tooth which contains blood vessels and nerves - _________________. d) The other name of food pipe- ___________________.

C) Write the preservatives used in case of the following items. ( 1 mark) a) Pickle - ____________________________________________________________ b) Almonds - ____________________________________________________________

______________________________________________________________________ b) To minimize the loss of vitamins and minerals in fruits and vegetables.

______________________________________________________________________ Q.6]A) Observe the pictures carefully and write a few lines to explain whether soil

erosion or erosion control is taking place. (3 Marks)

B)Explain the term: (1 Mark) Pasteurization: ___________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ C) The given graph shows the time to digest various food items consumed by Radha.

cheese orange Rot apple white bread 0

5 10 15 20 25

Food Items

Ti

m

e

t

ak

e

n

in

h

o

u

rs

1. How much time did a Roti take to digest completely? ________________________

2. Which food items consumed by Radha was digested very fast? __________________ 3. Which food item took 10 hours to digest? _____________________

4. Write any one food items from the above which will provide her with carbohydrates. _________________________________