CLASS-4, SCIENCE, PT

 

Class –IV                                  Subject- Science

Time : 1.5 hour                                  M.M. – 30

SECTION – A

I. Objective type questions.

1. Tick the correct (√) answer.                                                5

1. How should we use soap and detergents?

    a) moderately, because they cost very much. [  ]

    b) as much as we want [  ]

    c) as little as possible because soap and detergents can harm animals in the lakes and the sea. [  ]

2. What does the green effect do ?

    a)makes plants green. [  ]

    b) encourages people to build green house.  [  ]

    c) produce extreme weather conditions like storms and hot weather. [  ]

3. Which one of these products is biodegradable?

    a) aluminum can [  ], b) plastic bags  [  ], c) apple  [  ]

4) Earth is the only planet which has.

    a) dust and rocks [  ], b) gas and ice [  ], c) air and water [  ]

5) Air is made up of.

    a) Liquids [  ], b) Solids [  ], c) gases [  ]

2. Fill in the blanks with the word given.                                5

(dirty, world, infections, germs, drain)

i. Dirty surroundings invite…………………and…………………

ii. Environment means the ……………. Around us.

iii. Epidemic diseases can occur in…………areas

iv. The water from our house goes down the…………

 

3. Put a tick  (√) for correct and a cross (X) for false statements.      5

a. Air has weight and it exerts force.    [  ]

b. Air is present everywhere. [  ]

c. We can see the air. [  ]

d. Water vapour is present in are. [  ]

e. A balloon filled with air is lighter than an empty balloon. [  ]

 

4. Match the column A with column B.                                                5

A                                  B

Paper                           Non-biodegradable

Detergents                  biodegradable

Rubber                        Non-biodegradable

Plastic                          biodegradable

Leftover food              non-biodegradable

 

SECTION – B

II Short answer type Questions.                                                         10

1. Define biodegradable waste.

2. What is air? Name its various constituents.

3. Mention any two properties of air.

4. What is environmental sanitation?

5. Draw any two pictures of biodegradable waste or non-biodegradable waste.