Activity One - Watch

In the previous lesson we discussed what a climate budget may be and the factors that may impact it. We now need to focus on how these factors can impact feedback loops. Remember that a feedback loop can either accelerate or decelerate the warming of the planet. Positive feedback loops cause global warming but negative feedback loops brings the cycle back to a equilibrium by cooling the planet. Watch the youtube clip below and write down all the different factors that can cause either a positive or a negative feedback loop.

Activity Two - Draw and Annotate

You now know what a feedback loop is and have created a systems diagram in the previous lesson. You are now going to watch a series of youtube clips and create a feedback look systems diagram to show how solar radiation variations can cause both positive and negative feedback loops. You may want to initially make notes from the youtube clip and then create the diagram on A4 paper. Remember you need to annotate the digram to show you understand the process. Make sure you include the following reasons for the variations in solar radiation.

• Volcanic emissions and global dimming
• Changes in solar output
• Changes in Earth's orbit (Milankovitch's theory)
• Cosmic collisions

One of the skills required of a geographer is the ability to draw and you could be potentially asked to draw a systems diagram in the exam.

Useful Resources

'Geography Global Change. Study and Revision Guide' by Simon Oakes Page 39

Activity Three - Draw and Annotate

You now know what a feedback loop is and have created a systems diagram in the previous lesson. You are now going to watch a youtube clip and create a feedback look systems diagram to show how terrestrial albedo variations impact global temperatures. You may want to initially make notes from the youtube clip and then create the diagram on A4 paper. Remember you need to annotate the digram to show you understand the process.

Activity Four - Draw and Annotate

You now know what a feedback loop is and have created a systems diagram in the previous lesson. You are now going to watch a youtube clip and create a feedback look systems diagram to show how methane gas impact global temperatures. You will be focusing on flooding and the Arctic. You may want to initially make notes from the youtube clip and then create the diagram on A4 paper. Remember you need to annotate the digram to show you understand the process.

Useful Resources

'Geography Global Change. Study and Revision Guide' by Simon Oakes Page 41