Changing Climate 2. Geography GCSE OCR B.

What is an interglacial period?

• the last 2.6 million years of the Earth’s history

• a colder period in Earth’s history

• a warmer period in Earth’s history

• long-term change in the Earth’s global climate

How have temperatures changed in the Quaternary period?

• increased

• decreased

• stayed the same

What does the ratio of O16 and 018 in ice cores show?

• global temperatures over the last 800,000 years

• oxygen isotopes in the soil

• concentrations of CO2 in the atmosphere

• oxygen isotopes in ocean sediments

Which 2 answers relate to the Milankovitch cycle for precession?

• wobble

• circular and elliptical orbits

• cycle takes 26,000 years

• cycle takes 100,000 years

Name 2 gases which create the enhanced greenhouse effect

• carbon dioxide (CO₂)

• water vapour

• methane(CH₄)

• oxygen (O)

Which gas contributes the most to the enhanced greenhouse effect?

• methane

• carbon dioxide

• halocarbons

• nitrous oxide

What is a threat of climate change in the UK?

• heating costs will fall

• heatwaves will lead to deaths among the elderly

• industrial innovation will be encouraged to design new products to cope with the conditions

• agricultural productivity may increase under warmer conditions

When did the ‘Big Dry’ take place in Australia?

• between 2000 and 2005

• between 2002 and 2009

• between 2010 and 2015

Which of the following are global, environmental impacts of climate change?

• damage could occur to coastal ecosystems such as mangrove swamps, which form natural barriers to storms

• people may lose their jobs, for example fishing or tourism, and have to learn new skills

• harbours may become blocked by sediment due to increased rates of coastal erosion

Climate change in the UK may lead to premature cold related deaths to fall by how many by 2050

• 240

• 2,400

• 24,000

• 240,000