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Question 18M.2.HL.TZ1.c.iv

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.2.HL.TZ1.c.iv
Level HL Paper 2 Time zone TZ1
Command term Describe Question number c.iv Adapted from N/A
c.iv.
[Maximum mark: 2]
18M.2.HL.TZ1.c.iv

The radioactive nuclide beryllium-10 (Be-10) undergoes beta minus (β–) decay to form a stable boron (B) nuclide.

An ice sample is moved to a laboratory for analysis. The temperature of the sample is –20 °C.

The temperature in the laboratory is higher than the temperature of the ice sample. Describe one other energy transfer that occurs between the ice sample and the laboratory.

[2]

Markscheme

from the laboratory to the sample

conduction – contact between ice and lab surface.

OR

convection – movement of air currents

 

Must clearly see direction of energy transfer for MP1.

Must see more than just words “conduction” or “convection” for MP2.

[2 marks]

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