Question

1) Difference between
Laboratory thermometer & Clinical thermometer

2) How sticky pads helps red eyed frog ?

3) Explain Galvanization

4) Differentiate between Physical and chemical change

Answer 1

Hey there !

Thanks for the question !

Here's the answer !

1) Laboratory thermometer is used for measuring temperature of reactions and other stuffs involving applications in lab while clinicla thermometer is used for measuring human body temperature.

Laboratory thermometer is used for lab purposes due to which they have temperature range from -10°C to 110°C. Clinical Thermometers are have only from 35°C to 42°C.

Since both of them have different range of temperatures, they both exhibit different least count.

2) The sticky pads present in Red eyed frog helps the frog to jump longer distances and also stay balanced while landing. Due to the sticky nature they are able to survive landing troubles caused often.

3) Galvanisation is the process of coating a thin layer of superior zinc on the inferior metal like iron to prevent corrosion of the inferior metal's surface. This can help in forming a layer due to which the iron becomes corrosion resistant and doesn't get rusted.

4) Physical Change refers to temporary change and can be reversible while chemical change is permanent and irreversible.

Physical change is just the transformation from old substance while chemical change results in a completely new substance.

E.g. for Physical change = Tearing of Paper and E.g. for Chemical Change = Burning of Candle's thread.

Note: Melting of wax is a physical change but the burning of thread results in a new substance called ash which is a chemical change

Hope my answer helped !

Answer 2

1) CLINICAL THERMOMETER- It is used to measure body temperature. Temperature range from 35° to 42°c. It has less accurate results. It has kink to prevent instant back flow of mercury. It is used for medical and healthcare purposes. It is accessible for all and used in homes or clinics.

LABORATORY THERMOMETER- Usually used to measure temperature of each substance except the human body temperature. Temperature ranges from -10°-110°c commonly. Since it is more complex thermometer, it gives more accurate measurement. It usually dont have any kink. It supports a wide array of research activities. It is not accessible  for all and just used in laboratories.

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2) Sticky Pads help frog to climb the trees easily. They allow them to stay balanced and in a place. They secrete a sticky mucus that helps hold the frog onto smooth surfaces. They are used to grip onto twigs and branches.

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3) The process of applying a coating of zinc or any resistant material on a corrosive metal like iron or steel to prevent it from rusting is called galvanization.

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PHYSICAL CHANGE- The change in which, composition of the substance is not changed is physical change. It is a reversible changed and can be recovered. No new product is formed. It is the change in physical properties only. Absorption and evolution of energy do not take place. EG: tearing paper, breaking of glass etc.

CHEMICAL CHANGE- The change in which, composition of the substance is changed is chemical change. It is a irreversible changed and cannot be recovered. New product is formed. It is the change in chemical properties. Absorption and evolution of energy takes place. EG: Burning of paper and wood, cooking of food etc.

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HOPE HELPED :)