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Worksheets8.2 IB Physics
Total questions: 20
Worksheet time: 19mins
What has the highest albedo?
the oceans
Ice in the Arctic or Antarctic
the ground
roads
How does heat energy from the sun reach Earth?
conduction
insulation
radiation
Which would you expect to have the lowest albedo?
dark soil
white sand
ice and snow
deep sea water
Which object below would have an albedo score of 1.
A green forest
A deep blue ocean
Fresh clean snow
A pitch black rooftop
Which object below would have an albedo score of 0.
A green forest
A deep blue ocean
Fresh clean snow
A pitch black rooftop
What is the greenhouse effect?
The warming of a planet due to trapped radiation.
The cooling of Earth due to air pollution.
The heating of a solid, such as a rock.
Which of the following activities contributes the most to carbon emissions globally?
Deforestation
Agriculture
Burning fossil fuels
Respiration
The graph shows how the intensity of different wavelengths of radiation from a hot object varies with temperature. What can NOT be concluded from the graph about how the distribution of the intensity of radiation from an object changes as the temperature of the object increases?
the intensity of every wavelength increases
the shorter the wavelength the more rapid the increase in intensity
the peak intensity occurs at shorter wavelength
the intensity of every wavelength decreases
The graph below shows an object’s emission spectra for three different temperatures. Which of the following represents the CORRECT order of temperatures?
T1>T2>T3
T3>T2>T1
T2>T1>T3
T2>T3>T1
Which of the statements below is true for the emission spectra?
The emission is only in the visible region
The peak intensity increases with temperature
The peak intensity decreases with temperature
The peak frequency decreases with temperature
Electron volt (eV) is the unit of __________.
Energy
Radiation
frequency
voltage
The emissivity value of perfectly black body is
1
0
< 1
> 1
Suppose the surface temperature of the sun is doubled. The rate of radiation energy received on the earth will be increased by a factor of
2
4
8
16
Two spheres are made from the same material and the ratio of their radius is 2:1. If these spheres are at same temperature, what is the ratio of heat radiation energy emitted per second will be?
1: 4
4: 1
3: 4
4:3
Answer the question: Copy paste - Replace letters by value (2SF) Ax10^B Joules
(a)
Answer the question in Kelvin - 2 SF only -
Do not type the Unit
(a)
Give your answer 2 SF
(a)
