I. Tick the correct answer.
a. Animals that live in water are called
terrestrial animals aquatic animals arboreal animals
b. Which of these does not need to be cooked before eating?
potato cauliflower apple
c. Vitamins and minerals are called as
protective food body building food energy-giving food
d. Animals that eat both plants and animals are called
omnivores herbivores carnivores
II. Name the following.
1. A diet which provides all the nutrients in right quantities to be fit and healthy. ______________________________________
2. Long winter sleep of some animals ______________________________________
3. The yellow portion of the egg ______________________________________
III. State TRUE or FALSE. If false, write the correct statement.
1. Dolphins and whales have gills.
________________________________________________________________________
2. Calcium is an important mineral needed for healthy bones and teeth.
________________________________________________________________________
3. Vegetables should be washed after cutting.
_______________________________________________________________________
4. Birds have hollow bones.
________________________________________________________________________
IV. Answer the following questions.
1. How does the globefish protect itself from enemies?
___________________________________________________________________________
___________________________________________________________________________
2.What are aerial animals? Give one example.
___________________________________________________________________________
___________________________________________________________________________
__________________________________________________________________________
3.What is camouflage?
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
4. Name two methods of food preservation.
___________________________________________________________________________
___________________________________________________________________________
Electricity
Objective
The students will be able to know:-
• Some objects from which we get electricity
• Safety rules for electricity.
• Will have some idea about the components of an electrical circuit.
• How to set up an electrical circuit using the components.
Electricity
_We get electricity from the mains or from batteries.
_Many appliances(devices) in your homes use mains electricity to work.
Example_ Television, computer, fridges, lights
_Smaller electrical appliances often use batteries which store electricity.
Example_ Clocks, Radios, Phones, Torches
_An electric shock from a mains socket could kill you.
_Electricity can only travel if there is a complete circuit.
_Simple circuits can be sat up using components.
Components are just things that can go in the circuits.
An electrical circuit needs _ a cell (battery), wires an electrical component (device) like a bulb, a buzzer or a motor.
_The batteries and components must be set up properly.
_Circuit diagram use symbols instead of pictures.
_Switches control the flow of electricity in a circuit.
Changing circuits
_When you add more batteries the bulb gets brighter.
(Be careful though too many batteries will destroy the bulb).
_When you use higher voltage batteries the bulb gets brighter.
_When you add more bulbs the bulbs get dimmer.
Summary questions for section nine
1. Why are electrical wires made of metal?
____________________________________________________________________
2. What happens when a circuit has a break or gap in it?
____________________________________________________________________
3. What do you call a material that doesn’t conduct electricity?
_____________________________________________________________________
4. Why is there usually aplastic coating around a metal wire?
______________________________________________________________________
5. How does a simple switch work?
_______________________________________________________________________
6. Imagine that someone has made a simple circuit using battery, Wires and a bulb. The bulb doesn’t light up. Give three reasons to explain what might be wrong.
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
7. Name four things in your house that wouldn’t work without mains electricity.
___________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
8. Draw a circuit diagram showing a circuit with two cells (batteries), wires, an open switch and a bulb.
9. Draw circuit diagram showing a circuit with two cells (batteries), Wires, an open switch and a buzz
Please click on below link to download CBSE Class 4 Science Worksheet Set D
