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Quiz von Izzy Backhouse, aktualisiert more than 1 year ago
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Erstellt von Izzy Backhouse
vor mehr als 9 Jahre
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Frage 1
Frage
What colours on a thermogram represent hot temperatures?
Antworten
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White
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Blue
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Yellow
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Red
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Black
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Purple
Frage 2
Frage
Define: Temperature
Antworten
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= a measurement of energy on an absolute scale.
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= a measurement of the average kinetic energy of particles.
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= total energy of all particles.
Frage 3
Frage
Thermal energy always flows from a hotter area to a cooler one.
Antworten
- True
- False
Frage 4
Frage
What is the equation for specific heat capacity?
Antworten
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energy / (mass x temperature change)
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energy / mass
Frage 5
Frage
When a substance melts or solidifies there is no temperature change.
Antworten
- True
- False
Frage 6
Frage
The kinetic energy of particles increases at colder temperatures.
Antworten
- True
- False
Frage 7
Frage
What does arrow A on this graph showing changes of states represent?
Antworten
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Melting
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Boiling
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Freezing
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Condensing
Frage 8
Frage
What does arrow B on the graph showing the changes of state of water represent?
Antworten
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Melting
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Boiling
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Freezing
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Condensing
Frage 9
Frage
What are the 3 types of thermal transfer?
Antworten
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Conduction
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Radiation
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Nuclear
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Convection
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Sun
Frage 10
Frage
Conduction can work in solids because the particles pass their energy to neighbouring particles.
Antworten
- True
- False
Frage 11
Frage
Warmer regions of a fluid are more dense than cooler regions of fluid.
Antworten
- True
- False
Frage 12
Frage
What 2 surfaces are the best for absorbing and emitting radiation?
Antworten
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Black
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Shiny
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White
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Matt
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Silver
Frage 13
Frage
Which of the options below are methods of insulation?
Antworten
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Curtains and draught excluders
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Cavity walls
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Double glazing
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Carpets and underfloor insulation
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Reflective foil behind radiators
Frage 14
Antworten
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Energy flow
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Wasted energy
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Efficiency
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Useful energy
Frage 15
Frage
The higher the efficiency the less energy is wasted.
Antworten
- True
- False
Frage 16
Frage
If you put ice cubes in a glass, why do they melt?
Antworten
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The ice cubes cool the surroundings.
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The surroundings transfer heat to the ice cubes.
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The ice cubes need to be kept in the freezer.
Frage 17
Frage
What is the definition of a wave?
Antworten
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The transfer of energy without the transfer of matter.
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The movement of energy through water.
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The movement of particles in any surface/object.
Frage 18
Frage
The definition of a longitudinal wave is...
Antworten
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...when the displacement is perpendicular to the direction of the wave.
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...when the displacement is parallel to the direction of the wave.
Frage 19
Frage
Define: Frequency
Antworten
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= the number of complete waves to pass a point in 1 second.
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= the time taken for one wave to pass a point.
Frage 20
Frage
Light travels in straight lines.
Antworten
- True
- False
Frage 21
Frage
In the reflection of light, the angle of incidence is greater than the angle of reflection.
Antworten
- True
- False
Frage 22
Frage
How does the speed of light change when it enters a denser material?
Antworten
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It speeds up
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It slows down
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It doesn't change
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It stops
Frage 23
Frage
In refraction, the emergent ray bends towards the normal.
Antworten
- True
- False
Frage 24
Frage
Define: Diffraction
Antworten
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= the bending of light.
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= the bending of waves through a hole or around an obstacle.
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= the trajectory of a wave.
Frage 25
Frage
Which of the 3 statements below are true about ionising waves?
Antworten
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They have a severe effect on living tissue by killing cells or damaging DNA.
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They are harmless to humans.
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They have a short wavelength and high frequency.
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They carry lots of energy.
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They have a long wavelength and low frequency.
Frage 26
Frage
What is the order of the waves in the electromagnetic spectrum? (starting with highest frequency and shortest wavelength)
Antworten
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X-Ray, Ultraviolet, Visible, Infrared, Microwaves, Gamma, Radio waves
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Gamma, X-Ray, Ultraviolet, Visible, Infrared, Microwaves, Radio waves
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Gamma, Ultraviolet, Visible, X-Ray, Infrared, Microwaves, Radio waves
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Radio waves, Gamma, X-Ray, Visible, Infrared, Ultraviolet, Microwaves,
Frage 27
Frage
Which of the following are uses of gamma waves?
Antworten
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Tanning Machines
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Treating cancer
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TV remote
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Sterilising medical instruments
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Seeing bones
Frage 28
Frage
Select the 3 properties off Infrared waves.
Antworten
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They can burn human tissue by transferring their energy to our skin.
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They are reflected by metal surfaces.
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They can't penetrate materials such as plastic and glass.
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They are harmless to humans.
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They can pass through glass and plastic.
Frage 29
Frage
Infrared waves are absorbed by food during cooking.
Antworten
- True
- False
Frage 30
Frage
How does a microwave oven cook food?
Antworten
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The fan reflects waves from the turbine. They fill the oven and cook the food.
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The fan reflects waves from the generator. They bounce off the walls and cook the food.
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The fan reflects waves from the magnetron. They reflect off the walls and cook the food.
Frage 31
Frage
What is the critical angle of glass?
Antworten
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40 degrees
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41 degrees
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42 degrees
Frage 32
Frage
What is one benefit for patients when using an endoscope?
Antworten
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Patients will have a quicker recovery time as the surgery is less intrusive so no risk of infection.
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The operation hurts less.
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The doctor doesn't have to use a knife.
Frage 33
Frage
What are the 2 methods that can be used for multiplexing?
Antworten
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Different colours
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Different sizes
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Different times
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Different divisions
Frage 34
Frage
An analogue signal varies continuously in amplitude and frequency.
Antworten
- True
- False
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