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Lessons 8-9
WEATHERING AND EROSION

Truth to Teach (Source)

Isaiah 40:4 ‘A voice of one calling: “In the desert prepare the way of the Lord;
make straight in the wilderness a highway for our God. Every valley

will be raised up, every mountain and hill made low; the rough ground
shall become level, the rugged places a plain. …..”’

 The physical landscape is forever changing but spiritually the environment changes
too.

 The landscape can be changed by erosion.

 The effects of running water, frost shattering, heat shattering and dissolving of

rocks.

Way to Work (Means)

1. Review the previous lesson.

2. Read the verse above and talk about how physical and spiritual environments
change. Ask what causes change. (Our spiritual lives can suffer erosion as worldly

influences water down our effectiveness as Christians. Satan seeks to erode our
lives.)

3. Introduce the words weathering and erosion, asking the children what they
understand by these words. (Erosion – eating away or wearing down by wind, water

or ice. Weathering – action of elements in altering the form, colour or texture or
composition of rocks. Weathering is a form of erosion. The difference is that
erosion carries away the bits that have broken off.)

4. Talk about, and show pictures, of the effects of running water, frost shattering,
heat shattering and dissolving of rocks on different landscapes.

5. Explain how a river erodes the landscape. Prop a piece of flat board on a brick at

increasingly sharp angles. Put some sand on the board then pour some water behind
it. As the angle of the board becomes steeper more sediment is carried down the
slope. Explain that this is called ‘transportation’.

(God's Amazing Landscapes) 21