Question

part 1: identifying cer
read the analysis below and use three different coloured highlighters to identify the claim, the evidence, and the reasoning.

the fox and rabbit populations in an ecosystem are directly related to each other. as observed in the experiment, the rabbit population was initially at 550 members, as foxes were introduced to the ecosystem, the rabbit population declined eventually reaching only 40 members while the fox population increased. at this point, the fox population also began to decline and the rabbit population began to increase again ending with 225 members at the end of the investigation. this relationship makes sense because foxes prey on rabbits. more foxes means that there will be fewer rabbits because they are being consumed as prey. once the rabbit population decreases, there is less food for the foxes so their population will also decrease.

part 2: writing an analysis using cer
problem: how has global temperature changed over time?
results:
graph 1.1 - average global temperature change over time

Explanation:

Part 2: How has global temperature changed over time?

To determine how global temperature has changed over time, we analyze the graph "Average Global Temperature Change Over Time". The x - axis represents the year (from 1880 to 2020) and the y - axis represents the temperature anomaly (in °C) relative to the common baseline (1951 - 1980).

• Initially (around 1880), the temperature anomaly is around - 0.2 °C or lower (indicating temperatures were below the baseline).
• As time progresses towards 2020, we observe a general trend: the temperature anomaly values increase. By 2020, the temperature anomaly is above 0 °C and shows an upward trajectory.

This indicates that over time (from 1880 to 2020), the average global temperature has generally increased. There are fluctuations in the temperature anomaly values (the graph is not a smooth line but has wavy patterns), but the overall trend is an upward shift in the average global temperature.

Answer:

Over time (from 1880 to 2020), the average global temperature has generally increased. Initially (around 1880) the temperature anomaly was relatively low (e.g., around - 0.2 °C or lower relative to the 1951 - 1980 baseline), and by 2020, the temperature anomaly was above 0 °C with an overall upward trend, despite some fluctuations.