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Science Y3/Y4 – Water – week 11 - test

        8.     Why do roads crack in winter?       __________________________________________________________________________________


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                                                                                                      (2 marks)


        9.     Why do ships have a Plimsoll line?. __________________________________________________________________________________

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                                                                                                      (1 mark)


        10.    How do submarines surface and dive? _____________________________________________________________________________

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                                                                                                      (3 marks)
                              Total marks = 20






























































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