Activity 37 Volcanic Landforms

Activity 37: Volcanic Landforms Challenge  How do volcanic eruptions vary? Key Vocabulary: Magma Model

In this activity we are going to use a model In science, a model is a simplified representation of reality; they can be used to explain and predict natural processes.

All volcanic eruptions are the same? Agree or Disagree? All volcanic eruptions are the same?

Read the Introduction and define the term “Magma” in your notebooks. Magma  hot liquid rock

In your notebook, record the following data table: Types of Eruption Results Less gassy “magma” More gassy “magma”

Part A – Page D-10 Follow Steps 1-8 in your books. Make sure to record your results in your notebooks

Part B Follow Steps 9-18 Again, make sure to record your results Step 18: Compare the rocks and in your notebooks record which rock is more likely to be from the “more gassy” or “less gassy” magma. Explain your reasoning.

Follow Up Discussion What do you think the rubber stopper represented? Once magma erupts it is called lava More gassy magma causes pressure to build up and often causes a more explosive eruption. This lava flows less smoothly

What caused the more gassy magma to explode so violently? The chemical reaction of the baking soda and vinegar formed a gas Because of the stopper the gas built up and created pressure When the pressure was high enough the rubber stopper popped off Volcanic eruptions are the result of building pressure, BUT the pressure is NOT a result of a chemical reaction as it is in the model.

Analysis Questions In your notebooks, answer questions 1-3 and discuss your answers with your group