WorksheetsClimate Change Evidence
Total questions: 22
Worksheet time: 12mins
How is a thermometer direct evidence?
It's reliable measurement of global temperature only goes back to the 1880s
It shows what the temperature is
A unit of measurement for temperature
What is the thing with thermometers?
They aren't accurate
They measure temperate directly
They don't give precise numbers
What do thermometers tell us about climate change?
The global temperature has dropped over the last thousand years
The global temperature hasn't changed over the last 50 years
The 15 hottest years (1880-2017) have all been recorded between 1995 and 2017.
What years were the hottest recorded words?
2000-2015
1995-2017
1986-2012
Do thermometers give long term or short term evidence?
Long term evidence
Short term evidence
What are ice cores?
Ice sheets are made of layers of
snow over thousands of years. A
‘tube’ of ice can be drilled into
these ice sheets.
The middle of a sheet of ice (like the North Pole)
What do ice cores tell us about the climate?
What the air was like thousands of years ago
How cold the ice was thousands of years ago
The global temperature
How cold the North Pole was thousands of years ago
How do ice cores tell us about the climate?
The compact-ness of the ice shows how much snow melted that year
Snow settles and compacts to form ice, trapping air bubbles inside. The amount of CO 2 in the bubble indicates what the
temperature was like at the time.
The thickness of the ice shows the amount of snow that fell that year
How far back can ice cores show us data?
1 million years
400,000 years
620,000 years
150,000 years
Do ice cores show long term or short term evidence?
Long term evidence
Short term evidence
What is melting ice?
How fast ice melt every year
An experiment to show how quickly ice melts around the world
Ice sheets and glaciers are compacted snow. These been built up every year.
What is the significance of melting ice?
Glaciers and ice sheets are retreating, and many may disappear by 2035, showing the climate has been warming recently
The world temperature is rising because ice cubes have been melting faster around the world over the last ten years
Is melting ice long term or short term evidence?
Long term evidence
Short term evidence
What is meant by "less sea ice"?
Icebergs and sheets of ice in the ocean
Sea ice is formed as the sea water freezes. This freezes every winter and thaws each summer.
When the sea freezes
How and what does less sea ice tell us about the climate?
Less sea ice is formed each year – there was 75% less sea ice in 2014 than 1975. Less freezing of sea water means winters
are warmer.
More ice is melting so the ocean is covering ice caps
Is less sea ice long term or short term evidence?
Long term evidence
Short term evidence
What is rising sea level?
The sea has been rising because of the molecules expanding because of more heat
Sea levels have risen 10-20 cm in the last 100 years.
The sea is rising ever so slightly every year
Warming causes sea level to rise because:
Glaciers and ice sheets melt, adding more water to the sea
the molecules expand and take up more space, therefore rising
Water expands when warmed (thermal expansion)
Is rising sea level long term or short term evidence?
Long term evidence
Short term evidence
What are seasonal changes?
Natural seasonal activities such as trees flowering and birds returning from their migration occur earlier in the year.
It's always spring and summer, and never fall or winter
Winter temperatures have been less severe
What do seasonal changes show us?
Warmer temperatures mean the change from winter spring happens earlier--plants are able to start growing again earlier in as temperatures increase
Animals notice the difference in the climate and migrate earlier
Winter and fall are disappearing
Are seasonal changes long term or short term evidence?
Long term evidence
Short term evidence
