name 10 examples of conductors & insulators.

WHAT ARE GOOD AND BAD CONDUCTORS OF HEAT? EXPLAIN WITH EXAMPLES.

why we can't use laboratory thermometer to measuring human body temperature

why does a clinical thermometer have a kink?

what are 5 examples of bad conductors

 WHY DO WE WEAR WOOLEN CLOTHES IN WINTER ?

can a clinical thermometer be used to measure the temperature of boiling water ? why ?

Why are two thin blankets usually warmer then one thick blanket ?

Explain land breeze and sea breeze?

Test solution Effect on red litmus paper Effect on blue litmus paper Inference

Lemon juice No change Red Acidic

Tap water No change No change Neutral

Detergent solution Blue No change Basic

Aerated Drink Blue No change Basic

Soap solution Blue No change Basic

Shampoo Blue No change Basic

Common Salt solution No change No change Neutral

Sugar solution No change No change Neutral

Vinegar No change Red Acidic

Baking soda solution Blue No change Basic

Milk of magnesia Blue No change Basic

Washing soda solution Blue No change Basic

Lime water Blue No change Basic

Test solution Effect on turmeric solution Remarks

Lemon juice No colour change Acidic

Orange juice No colour change Acidic

Vinegar No colour change Acidic

Milk of magnesia Red Basic

Baking soda Red Basic

Lime water Red Basic

Sugar No colour change Neutral

Common salt No colour change Neutral

What about sugar and common salt with turmeric solution? How do we conclude about the nature?

name some bad conductors of heat

why are ventilators made close to the ceilings (give reasons)

precautions while reading a clinical thermometer?

why black colour umbrella is used in summer than a white one

 Why is water a bad conductor of heat ?

what is a clinical thermometer?

What are its features and functions?

1. Describe the process of convection of heat?
2. Draw a neat labelled diagram of a thermos flask. How does it prevent transfer of heat by conduction, convection and radiation?
3. How sea breeze and land breeze are set up in different paragraph and should be short? 

• Test solution Effect on turmeric solution Remarks

1. Lemon juice No colour change Acidic

2. Orange juice No colour change Acidic

3. Vinegar No colour change Acidic

4. Milk of magnesia Red Basic

5. Baking soda Red Basic

6. Lime water Red Basic

7. Sugar nocolour change Neutral

8. Common salt No colour change Neutral

What about sugar and common salt with turmeric solution? How do we conclude about the nature?

WHY DOCTORS DIP THE THERMOMETER IN A LIQUID BEFORE USE? WHY IS IT KEPT UNDER THE TONGUE

why does an aluminium window frame feel colder to touch than a wooden frame? 

Shopkeepers selling ice blocks usually cover with jute sacks? Why?

WHY THE THERMOMETER IS KEPT UNDER THE TONGUE?

Mud house are cool in summer and hot in winter . why ???????

What happens to radiant heat when it falls on body?

A short-note on Green House ?

Slabes of ice are covered with saw dust or gunny bags.Give reason.

Q4 why laboratory thermometer does not have a kink?

Q5 what precautions will you observe while using a clinical thermometer?

Q6 describe an experiment to show convection currents in a liquids.

 why do we wear woollen clothes in winter & cotton clothes in summer?

explain why gases expand more than liquis and solids

what is kink present in thermometer

why mercury does not fall or rise in a clinical themometer when taken out of the mouth?

 what is the difference between conduction, convection and radiation? 

why are car radiators painted black?

A wooden spoon is dipped in a cup of ice cream. Its other end

(a) becomes cold by the process of conduction.

(b) becomes cold by the process of convection.

(c) becomes cold by the process of radiation.

(d) does not become cold.

is the answer to this (d) does not become cold?

why wearing more layers of clothing during winter keeps us wrmer than wearing just one thickpiece of clothing?

Why do wet clothes dry faster in winter than in the rainy season?

WHY DO PEOPLE PREFER TO WEAR DARK CLOTHES IN WINTER AND LIGHT CLOTHES IN SUMMER?(HERE LIGHT MEANS LIGHT COLUORED CLOTHES FOR EG.WHITE)

Q: why are you advised to use an umbrella when you go out in the sun?

mode of heat transfer in

1) A paper cup full of hot soup lying on the table

2) cooking vegetables in a pan

 what are the conditions required for conduction fo heat?

What is ice point and what is steam point?

What is white petrol?

WHATS THE DIFFERENCE BETWEEN A DIGITAL AND A CLINICAL THERMOMETER?(ANY 3 POINTS)

a clinical thermometer has the range of 35 degree to 42 degree .why

Two test tubes full of water are heated -one from below and the other from near the top. In which case will the water heat up faster and why?