(2) Cement and automobile gasoline in the picture are related to human habitation and transportation;
(3) Vinegar in the picture;
(4) Chemistry plays an important role in ensuring human survival and improving the quality of life. For example, proper use of monosodium glutamate can make food more delicious; Eating iodized salt can prevent goiter; Metal smelting has enabled people to live in various buildings and take various means of transportation; The development of new fuels and new materials has promoted the development of space technology.
So the answer is: (1) 1234569⑥. (2) 169; . (3) 6. (4) Proper use of monosodium glutamate can make food more delicious. Eating iodized salt can prevent goiter (any reasonable answer is acceptable).