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Question 18M.3.HL.TZ2.b

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Date May 2018 Marks available [Maximum mark: 3] Reference code 18M.3.HL.TZ2.b
Level HL Paper 3 Time zone TZ2
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 3]
18M.3.HL.TZ2.b

Outline why a hypothesis of dark energy has been developed.

[3]

Markscheme

data from type 1a supernovae shows universe expanding at an accelerated rate

 

gravity was expected to slow down the expansion of the universe

OR

this did not fit the hypotheses at that time

 

dark energy counteracts/opposes gravity

OR

dark energy causes the acceleration

 

OWTTE

[3 marks]

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