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Explain how blood is pumped through the body.

Blood from the veins is collected in the right and left atria of the heart. The atria can contract because of the impulses from the sinoatrial node (SA) (the heart’s natural pacemaker). When this happens, th...
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Answered by Iulia B. • Biology tutor
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Study Figure 2 showing the Demographic Transition Model. Explain why death rates started to fall at the beginning of Stage 2. You should refer to two reasons in your answer.

During stage 2 of the DTM, death rates started to fall due to advancements in healthcare. Vaccinations had been discovered and so programmes were introduced to inoculate babies against diseases such as small...
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Answered by Joshua E. • Geography tutor
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What is the urban carbon footprint and why is it important that geographers and policy makers/political leaders have knowledge and understanding of it?

The urban carbon footprint is the total set of greenhouse gas emissions emitted from a particular urban area, produced through activities such as primary footprint processes, eg. burning fossil fuels and cor...
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Answered by Joshua E. • Geography tutor
2968 Views

How would I structure a 25 mark essay?

So for a 25 mark essay, being clear in your arguments is one of the most important things. You should start off with an introduction, this should include key definitions on the topic and an overview of the a...
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Answered by Jack K. • Economics tutor
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Describe and explain the formation of the chain of Hawaiian Islands in the North Pacific Ocean shown in Resource A.

Description: Resource 6A shows a 500km chain of Hawaiian islands in the North Pacific, from the North-west (22oN 160oW) where the islands Niihau and Kauai are located, comprising of rock aged 5.2 and 4.7 mil...
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Answered by Joshua E. • Geography tutor
4564 Views