Landform Changes and Water Effects

The video introduces second graders to the concept of changing landforms, focusing on cliffs, diagrams, and models. Students learn to visualize and diagram changes in landforms, compare different landforms, and analyze changes in arches and valleys. The lesson emphasizes the role of water and wind in shaping landforms over time.

What is the primary material that makes up landforms like cliffs?

• Sand

• Soil

• Rock

• Water

Which natural forces are mentioned as causes for changes in cliffs?

• Earthquakes and volcanoes

• Wind and water

• Sunlight and temperature

• Gravity and magnetism

What is the purpose of using diagrams in studying landform changes?

• To predict weather

• To create art

• To visualize and share ideas

• To measure distances

In the diagram example, what could have caused the water level in the cup to decrease?

• Evaporation

• Condensation

• Boiling

• Freezing

What is a key factor in the change of landforms like arches and valleys?

• Plant growth

• Water erosion

• Human construction

• Animal activity

How does water contribute to the change in the shape of an arch?

• By dissolving the rock

• By eroding the rock

• By freezing and expanding

• By heating the rock

What is a similarity between the arch and valley landforms discussed?

• Both are made of sand

• Both have water running through them

• Both are man-made

• Both are found in deserts

What shape is a valley typically described as?

• A square

• A circle

• A V

• An upside-down U

What evidence suggests that water is a factor in changing the shape of a valley?

• Birds nesting nearby

• Trees growing on the sides

• Water running through the middle

• Presence of fish

What should students do if they have new ideas about what caused the cliff to change?

• Tell a friend

• Add them to their list

• Write a story

• Ignore them