Sodium + Water Sodium Hydroxide + Hydrogen Potassium + Water Potassium Hydroxide + Hydrogen
Sodium + Water Sodium Hydroxide + Hydrogen Potassium + Water Potassium Hydroxide + Hydrogen
Sodium + Water Sodium Hydroxide + Hydrogen Potassium + Water Potassium Hydroxide + Hydrogen
Summative assessment
Changes in carbon dioxide levels
1. There is a strong positive correlation between carbon dioxide concentration
and time.
5. H H H H H H H H H H H H H H H H
H C C C C C C H H C C C C C H H C C C C C H
H H H H H H H H H H H H H H
CH3 CH3
n-hexane
2-methylpentane 3-methylpentane
CH3
H H H H H H H
H C C C C H H C C C C H
H H H H H
CH3 H3C CH3
2,2-dimethylbutane 2,3-dimethylbutane
11. To help scientists in their future work, past eras can be reconstructed and
modelling done to explain previous climate change and predict future climate
patterns; global warming can be studied and explained by studying changes in
glaciers, as they are very sensitive to temperature fluctuations.
13. During the 20th century and before, burning fossil fuels for manufacturing,
transportation and production of electricity has led to increased carbon dioxide
in the atmosphere. The concentration of other gases in the atmosphere, such as
methane, has also increased greatly. These greenhouse gases reflect heat
energy being radiated from the surface of the earth, resulting in an increase in
global temperatures. Other factors have also contributed to global warming
including dust and soot from grazing, farming and manufacturing.