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课内探究

质疑探究：

Please fill in each blank within three words after reading the text on Page 45

Push some _6___ down the tube

Leave the tube for one week The nails have not rusted Iron does not rust in dry air Iron in air-free water Half-fill a test tube with water

Boil the water for three minutes to ___7___ there is no air in the water

Put _8__clean nails in the water

Add _9__to the water to keep air out of the water

Leave the tube for one week . The nails do not rust Iron does not rust in air-free water Iron in ordinary water Half-fill a test tube with water and add two or three _10____

Leave the tube for one week The nails rust Iron rusts in ordinary water 当堂检测：

Read the passage A & B carefully and answer the following question.

1. Which is the best title for the passage A?

A. The Different uses of Metals B. The Reaction of Metals

C. The Reaction of Metals with Water D. The Reaction of Metals with Oxygen

A. steel, copper B. iron, zinc C. steel, iron D. iron, copper

3. Which metal doesn't react with water?

A. Sodium B. Iron C. Copper D. Potassium

4. Which metal reacts with steam?