Heat And Temperature

Question 1

Absolute Zero

Answer 1

The coldest possible temperature is o k.

Question 2

Infrared Thermogram

Answer 2

Anything warmer than absolute zero gives off infrared radiation. infrared radiation can be photographed with special films.

Question 3

Thermograph

Answer 3

A bimetallic strip coils and uncoils as the temperature changes. One end of the strip is attached to a long, light metal lever that holds a special pen.

Question 4

Bimetallic strip

Answer 4

Made of two different metals joined firmly together.When heated one metal expands more than the other.

Question 5

Thermocouple

Answer 5

Made of two different metals that are twisted together. When heated a small electrical current is generated m. Measures very high temperature but not low temperatures

Question 6

Responder

Answer 6

A pointer,light or other mechanism that uses the signal in some way

Question 7

Signal

Answer 7

Information about temperature, such as an election current

Question 8

Sensor

Answer 8

A material that is affected by change in some feature of the environment

Question 9

Kelvin Scale

Answer 9

A scale used for measuring temperature in scientific experiments:on the Kelvin scale, pure water freezes at 273 K and boils at 373 K

Question 10

Celsius scale

Answer 10

The most common scale for measuring temperature ; on the celsius scale,water at sea level boils ar 100c and freezes below 0c.

Question 11

Scales

Answer 11

A series of equally divided sections that are marked and numbered for use in measurement (centimetres,litres, or grams)

Question 12

4 devices for measuring temperature

Answer 12

Thermocouple
Bimetallic strip
Recording thermometer
Infrared thermogram

Question 13

Thermometers

Answer 13

A device used to measure temperature

Question 14

Partial model of matter

Answer 14

• All substances are made up of tiny particals
• Particals are always in motion
• particals have space between them
• motion of particals increase with temperature increase

Question 15

Energy

Answer 15

The ability to do work and to cause change(chemical or physical)

Question 16

Thermal Energy

Answer 16

The energy generated by the movement or vibration of particals; the total kinetic energy of all the particals in a substance.

Question 17

Two features of energy

Answer 17

Changes happen when there is a difference of energy

Energy is always transferred in the same direction ( high to low )

Question 18

Joules (J)

Answer 18

The standard (SI) unit for measuring energy

Question 19

Expand

Answer 19

The increase in volume

Question 20

Contract

Answer 20

To shrink or decrease in volume

Question 21

Heat Capacity

Answer 21

the thermal energy needed to raise the temperature of 1kg of a substance, such as water, by 1*c

Question 22

specific heat capacity

Answer 22

of a material, the energy changed that is required to warm or cool a standard amount of the material (1 g or 1 kg) by 1*c

Question 23

Melt (fusion)

Answer 23

to change from a solid to a liquid

Question 24

Freeze (solidification)

Answer 24

The change from a solid to a liquid

Question 25

evaporate

Answer 25

the process when a liquid changes into a gas or a vapor

Question 26

condense

Answer 26

the change from a gas or vapor to a liquid

Question 27

sublimation

Answer 27

a change in state when a gas changes directly to a solid or a solid changes directly to a gas

Question 28

Melting Point (freezing point)

Answer 28

the temperature at which solid matter begins to change to liquid

Question 29

boiling point

Answer 29

the temperature at which a liquid begins to boil and change into a gas or a vapor

Question 30

evaporative cooling

Answer 30

a process in which the faster-moving particles on the surface of a liquid evaporates and escapes into the air, the slower moving particles, which are left behind, have lower kinetic energy, decreasing the temperature of the remaining liquid and the surface on which it is resting.