Year 7 Biology and Chemistry Revision Summer 2017

Remember to use your study guide and BBC bitesize ks3

Biology

1. Cells, Tissues and Organs

· Label parts of a microscope, explain how to make a slide (with correct words) and make a slide

· Explain experiments for looking at onion cells (plant) and cheek cells (animal)

· Label and explain function of nucleus, cytoplasm, cell membrane, cell wall, vacuole and chloroplasts

· Differences and similarities between plants and animal cells

· Specialised cells – red blood cell, white blood cell, sperm cell, egg cell, root hair cell, palisade cell, cilia cell, nerve cell

· What is a tissue

· Organs and their functions

· Organ systems – circulatory, respiratory, digestive, urinary, reproductive, skeletal/muscular and nervous

2. Microbes and disease

· What are bacteria, viruses and fungi

· Examples of the above

· Useful bacteria e.g. fermentation, yoghurt, cheese, bread making

· Examples of diseases caused by bacteria and viruses – the symptoms and treatment

· How diseases are spread e.g. air, food, blood (with examples)

· Prevention of diseases – physical barriers e.g. skin, mucous, tears, acid in stomach, good hygiene

· Treatment of diseases – White blood cells (antibodies, phagocytosis, anti toxins), antibiotics (medicines that kill bacteria only)

· Immunity – natural (Breast feeding babies)and acquired ( vaccinations e.g. MMR)

3. Animal Reproduction

· Human life cycle

· Male and female reproductive systems

· Fertilisation, egg and sperm cells

· Development of embryo and foetus in the uterus (placenta)

· Birth

· Puberty – changes in male and female body, hormones involved, menstrual cycle

4. Fit and healthy/Respiration

· What makes us fit and healthy – exercise, physical activity, balanced diet

· What makes unhealthy – lack of exercise, poor diet, smoking, excessive alcohol, illegal drugs

· Affect of physical activity on pulse rate – resting pulse rate and recovery rate

· Gases that make up air

· Structure on function of breathing system – trachea, lungs, diaphragm, intercostals muscles, alveoli

· Structure and function of circulatory system – heart, arteries, veins and capillaries

· Heart disease and smoking (diseases caused by smoking; lung, mouth, throat cancer, emphysema, heart disease) How smoking affects cilia cells in trachea. Nicotine, Tar and carbon monoxide.

· What is respiration

Chemistry

1. Acids and Alkalis

· Dangers and hazard symbols

· Acids alkalis in the home and lab acid and alkalis (hydrochloric acid, sulphuric acid, nitric acid, ethanoic acid, sodium hydroxide, calcium hydroxide)

· Indicators – Litmus, Universal indicator

· pH scale and universal indicator

· How to make red cabbage indicator

· Neutralisation

· Useful neutralisation reactions e.g. neutralising acids with indigestion tablets

2. Chemical Reactions

· What are reactants and products

· Types of chemical reactions and examples e.g. oxidation, combustion, photosynthesis

· Reactions – oxidation of magnesium and rusting

· Combustion reaction

· Basic word equations for reactions e.g.

Magnesium + oxygen → magnesium oxide

Iron + Oxygen → Iron oxide

3. Solids, Liquids and gases

· How particles are arranged in solid liquid and gas

· Properties of SLG e.g. compressibility, density, fixed volume, fixed shape

· Changing states – melting, boiling/evaporation (require heat energy) and freezing and condensing (heat energy removed)

4. Solutions and Separation

· What the words mean – solvent, solute, solution, dissolving, soluble, insoluble, saturated

· Decanting and sieving

· Filtration

· Chromatography

· Distillation – simple distillation, Liebig condenser