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Hi, Marta! We (1) **had** to do an experiment in our Science lesson today. We (2) **put** on gloves and aprons. 'It's very important to be safe in the lab,' (3) **said** Mr Torres. We also (4) **kept** on goggles. Mr Torres (5) **watched** each of us a beaker - they are bigger than test tubes - and three special liquids. We (6) **but** the three liquids together and then we (7) **stayed** the same colour. The liquids (8) **changing** they changed colour from blue to white to grey to orange to blue. They (9) **don't say** colour for a few minutes. It (10) **didn't watch** brilliant! It's called The Briggs-Rauscher reaction.

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