The Earth's oceans are becoming more acidic. How have human actions caused this?
0%
Removing coral has lead to the sea being unable to buffer itself
0%
Increased fossil fuel burning has released more CO2 and other gases, making the oceans more acidic
0%
Pollution draining off the land has included acids. These have lowered the oceans pH
0%
Adding limestone and slaked lime to the waterways has dramatically lowered the pH
Q.2.
Solar output is the amount of energy given off by the Sun. From 2007-2009 the solar output declined so much that this period is known as a solar minimum. What happened to the Earth's surface temperatures during this time?
0%
They continued to rise
0%
They fell slightly
0%
They fell sharply
0%
There was no change
Q.3.
What part of the planet absorbs most of the temperature increase?
0%
The core
0%
The land masses
0%
The polar icecaps
0%
The oceans
Q.4.
What is the evidence that anthropogenic (man-made) causes are behind the rise in CO levels?
0%
CO2 levels have risen above 300ppm slightly in the past 100 years, before dipping back below in 2005 after carbon emissions were reduced
0%
There is no scientific evidence, but anecdotal observation suggests we are to blame
0%
CO2 levels have been rising since humans first appeared on Earth
0%
CO2 levels have risen dramatically since the beginning of the industrial revolution and are higher than they've been in 650,000 years
Q.5.
The extent and thickness of the Artic sea ice is reducing each year. But what other technique can be used on the ice to gather evidence for climate change?
0%
Seal calving rates can be looked at
0%
Soil trapped in the ice sheets can be monitored
0%
The thickness of the ice above land at the North Pole can be measured
0%
Ice cores can be studied
Q.6.
How much have sea levels risen in the past 100 years?
0%
1.7 cm
0%
17 cm
0%
170 cm
0%
1.7 m
Q.7.
How might scientists monitor snow coverage?
0%
Using satellites
0%
Using anecdotal data from skiers and other mountain users
0%
Using weather reports
0%
Visiting all the places individually
Q.8.
What is the evidence for climate change from glaciers and ice sheets?
0%
They are shrinking
0%
They are expanding
0%
They are remaining the same, with ice being formed at the same rate as it melts
0%
They are moving faster, but not shrinking
Q.9.
Why can't NASA's Moderate Resolution Imaging Spectroradiometer collect data on the snow coverage at the poles during their respective winters?
0%
The extreme cold stops the sensors working
0%
No one can practically work at the poles during the winter
0%
There is no sunlight at the poles during their winters
0%
The poles tilt away from the satellite
Q.10.
Extreme events are an obvious source of evidence for climate change. In terms of warmest summers on record what has been the trend in the twenty-first century?
0%
There have been 2 of the warmest summers on records. 2 more have been the coldest on record
0%
Only 1 summer has broken a record
0%
5 summers have been the warmest on record
0%
There has been a big increase in the number of warmest summers on record
Support mcqgeeks.com by disabling your adblocker.
Please disable the adBlock and continue. Thank you.