Fig. 4.1 is a photograph of part of a kitchen. Fig. 4.1 Describe methods of maintaining hygiene in the home that reduce the spread of disease.

15.2.1 Describe the use of antibiotics for the treatment of bacterial infection

15.2.2 State that some bacteria are resistant to antibiotics which reduces the effectiveness of antibiotics

15.2.3 State that antibiotics kill bacteria but do not affect viruses

15.2.4 Explain how development of resistant bacteria such as MRSA can be minimised, limited to using antibiotics only when essential and ensuring treatment is completed

15.2.5 Explain why antibiotics kill bacteria, but do not affect viruses

21.3.1 State the sources and effects of pollution of land and water, e.g. rivers, lakes and the sea, by insecticides, herbicides and by nuclear fall-out

21.3.10 Discuss the causes and effects on the environment of acid rain

21.3.11 State the measures that are taken to reduce sulfur dioxide pollution and reduce the impact of acid rain

21.3.12 Explain how increases in carbon dioxide and methane concentrations in the atmosphere cause an enhanced greenhouse effect that leads to climate change

21.3.13 Describe the negative impacts of female contraceptive hormones in water courses, limited to reduced sperm count in men and feminisation of aquatic organisms

21.3.2 State the sources and effects of pollution of water (rivers, lakes and the sea) by chemical waste, discarded rubbish, untreated sewage and fertilisers

21.3.3 State the sources and effects of pollution of water (rivers, lakes and the sea) by chemical waste, discarded rubbish, untreated sewage and fertilisers

21.3.4 State the sources and effects of pollution of the air by methane and carbon dioxide, limited to the enhanced greenhouse effect and climate change

21.3.5 State the sources and effects of pollution of the air by methane and carbon dioxide, limited to the enhanced greenhouse effect and climate change

21.3.6 State the sources and effects of pollution of the air by methane and carbon dioxide, limited to the enhanced greenhouse effect and climate change

21.3.7 State the sources and effects of pollution of the air by methane and carbon dioxide, limited to the enhanced greenhouse effect and climate change

21.3.8 Explain the process of eutrophication of water in terms of: – increased availability of nitrate and other ions – increased growth of producers – increased decomposition after death of producers – increased aerobic respiration by decomposer – reduction in dissolved oxygen – death of organisms requiring dissolved oxygen in water

21.3.9 Discuss the effects of non-biodegradable plastics in the environment, in both aquatic and terrestrial ecosystems