B. Fill in the blanks. 1. A change in which substances react to form a new substance is called a 2. The properties of materials can be changed by adding different them. 3. The scientist who discovered oxygen was to 4. is the only scientist to be awarded Nobel Prizes in Chemistry and Physics. 5. are used to increase nutrients in the soil. 6. Food can be kept fresh longer by adding substances called 7. Artificial and are added to many foods to make them more appealing. 8. Polyester is a fibre, 9. is the base for most liquid cosmetics 10. are products obtained from petroleum
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5
1.Chemical reaction
2.Mixing, heating and cooling
3.Joseph Priestley
4. Linus Pauling ( but not sure)
5.Manure
6. Preservatives
7. Don't know, sorry
8. True, Polyester is a synthetic petroleum-based fibre
9. Water
10. Petroleum products produces gasoline, (including gasoline-based biofuel blends), diesel (including diesel-based biofuel blends), LPG, aviation fuel and other refinery products (mainly heating oil).
Answered by
3
1. It is called a chemical change
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