{"type":"multi-choice","id":"75145","dataJson":{"prompt":"Iron can be extracted through smelting. ","options":[{"key":"0.9131562336154335","label":"True","value":"True"},{"key":"0.7968675657692862","label":"False","value":"False"}],"limitChoices":{"max":1,"min":1},"validResponse":["True"]}}

{"type":"fill-in-blanks","id":"75146","dataJson":{"key":3,"prompt":"Fill out the blanks","options":{"metals":[{"label":"metals","value":"metals"},{"label":"irons","value":"irons"}],"silver":[{"label":"silver","value":"silver"},{"label":"aluminium","value":"aluminium"}],"meteorites":[{"label":"meteorites","value":"meteorites"},{"label":"gold","value":"gold"}],"pure metals":[{"label":"pure metals","value":"pure metals"},{"label":"impure metals","value":"impure metals"}]},"template":"Some {{metals}} like {{silver}} and gold are often found as nearly {{pure metals}}, they can be mined directly from the Earth. Historically, the only other source of pure metals came from {{meteorites}}. As you can imagine, meteorites were not a reliable source of materials to early people.","validResponse":{"metals":"metals","silver":"silver","meteorites":"meteorites","pure metals":"pure metals"}}}

{"type":"multi-choice","id":"75147","dataJson":{"prompt":"Why can carbon not be used to extract magnesium from its ore containing magnesium oxide?","options":[{"key":"0.34050135653851143","label":"because magnesium is lower than carbon in the reactivity series","value":"because magnesium is lower than carbon in the reactivity series"},{"key":"0.28570801092271847","label":"because magnesium oxide is a powerful explosive ","value":"because magnesium oxide is a powerful explosive "},{"key":"0.06432110093362908","label":"because magnesium is higher than carbon in the reactivity series","value":"because magnesium is higher than carbon in the reactivity series"}],"limitChoices":{"sameNumberAsCorrectAnswers":true},"validResponse":["because magnesium is higher than carbon in the reactivity series"]}}

{"type":"image-bucket","id":"75148","dataJson":{"key":3,"prompt":"How are the following metals extracted? ","buckets":[{"key":"0.0372272132515602","name":"electrolysis ","old_key":"0"},{"key":"0.9385152729986932","name":"carbon","old_key":"0.9594406127975934"},{"key":"0.8462116285215332","name":"found in pure form ","old_key":"0.11342384908946812"}],"options":[{"key":"0.3824888957483592","label":"magnesium","value":"magnesium","bucket":"0.0372272132515602","fileboyId":"ecfe0b86-a0b1-41eb-9b31-749b94b14b88"},{"key":"0.10625826824447526","label":"potassium ","value":"potassium ","bucket":"0.0372272132515602","fileboyId":"9e37b735-11a0-4d63-873e-b21b4981bee6"},{"key":"0.02529385962703201","label":"tin","value":"tin","bucket":"0.9385152729986932","fileboyId":"584cfcd5-2bba-4a15-a3c8-8f221bd7a629"},{"key":"0.8989405970568486","label":"lead","value":"lead","bucket":"0.9385152729986932","fileboyId":"8b2ec2d6-d5fc-45b7-9dc2-f2864d30fda6"},{"key":"0.23374346479093366","label":"gold","value":"gold","bucket":"0.8462116285215332","fileboyId":"57c4bbdb-5e68-42d9-93b6-8a8d9188b68e"},{"key":"0.4216112709373988","label":"platinum ","value":"platinum ","bucket":"0.8462116285215332","fileboyId":"23c8164e-390f-4e57-9495-b320a3d28560"}]}}

{"type":"multi-choice","id":"75149","dataJson":{"key":4,"prompt":"What reaction takes place in a blast furnace? ","options":[{"key":"0.3498425417576031","label":"iron oxide + heat -\u003e iron + oxygen","value":"iron oxide + heat -\u003e iron + oxygen"},{"key":"0.9191082456846567","label":"iron oxide + carbon -\u003e iron + carbon dioxide","value":"iron oxide + carbon -\u003e iron + carbon dioxide"},{"key":"0.37226180370210515","label":"iron + oxygen -\u003e iron + carbon dioxide","value":"iron + oxygen -\u003e iron + carbon dioxide"}],"limitChoices":{"sameNumberAsCorrectAnswers":true},"validResponse":["iron oxide + carbon -\u003e iron + carbon dioxide"]}}

Answer incorrect

Look at the slide below to work out the answer.