climate change

Question 1

what are glacial periods

Answer 1

periods of ice building due to low global temprature. These periods lead to growth of ice caps over the land they are about 100,000 years long. The last glacial period

Question 2

Inter glacial periods

Answer 2

periods of warmer climate that occour between glacial periods. These see the melting of ice caps. They are about 10,000 years long

Question 3

ice cores

Answer 3

scientists

Question 4

glacial retreat

Answer 4

Comparing the location of the end of the glacier each year can show whether the year has been colder or warmer depending on if the glacier has advanced or treated recent computer models also suggest up to 25% of the worlds current mountain ranges could disappear by 2050

Question 5

sea ice

Answer 5

just currently around 50% less sea ice over Arctic Ocean than there was 30 years ago. Sea temperature appears to be getting warmer with permanent ice cover decreasing around 9% per decade.

Question 6

tree rings

Answer 6

because trees are sensitive to, local climate conditions such as rain and temperature they give scientist some insight into the climate of the past for example, tree rings grow wider in warm wet ear and they are thinner in years were its cold and dry

Question 7

thermometrs

Answer 7

using the data scientist have recorded an increase in the average combined land and ocean surface temperature 0.85% by the end of the 19th century the who says at the 21 years on record have been back in the past 22 years with 2015 -2018 making up the top four. If this continues temps may have risen 3 to 5% by 2100

Question 8

pollen anaylsis

Answer 8

By examining pollen from a sample scientist are able to tell which plant made the pollen and when plants are adapted to certain climate if the climate changes in an area some species will disappear other species are more suited to the new climate conditions

Question 9

changing seasonal patterns

Answer 9

Studies have suggested that the timing of natural activities such as a tree flowering and bird migration is adapting

Question 10

rising sea levels

Answer 10

Fridge global sea levels have risen 0.19 m between 19 0 one and 2010 there are two different reasons why sea levels have melting ice caps and when Ocean water is warm expanse in volume