Netherlands VWO 4 (bovenbouw, 2e fase) General Natural Science
Chapters: 3
1. Skills
Communication and information skills · Practical, maths, design and research skills · Science in society
- Research Skills: From a Question to a Finished Project – Research is a careful way of finding an answer. You ask a clear, focused question, plan how to answer it, find information and check that each source can be trusted, collect and analyse your own data, draw a conclusion that the evidence supports, and share it while crediting every source you used.
- The Scientific Method – The scientific method is the careful way scientists find out how the world works. Observe something, ask a testable question, make a hypothesis (a clear, testable guess), test it with a fair experiment (change one variable, measure one, keep the rest the same), repeat and record data, analyse it, draw a conclusion and share it so others can check. Results that fail the test are useful too: they send you back to a new hypothesis.
- Science, Technology and Society: How Discoveries Change Our Lives – Science finds out how nature works; technology uses that knowledge to make tools and solve problems. Society shapes science too, by asking questions, paying for research and making rules. Big changes such as the printing press, the steam engine, electricity, vaccines and the internet changed how people work, live and think. Every technology has benefits and risks. To decide wisely we look at evidence, weigh benefits against risks, ask who gains and who loses, think about ethics and the future, and use safety rules.
2. Analysis of and reflection on science and technology
How knowledge is formed · Applying knowledge · Influence of science and technology
- Nature of Science: How Scientific Knowledge Is Built and Changed – Science is a way of knowing that rests on evidence anyone can check. Scientists observe, infer, test ideas that could be proved wrong, and let other experts check their work. Laws describe what happens; theories explain why. Scientific knowledge is reliable but always open to change, and sometimes a whole way of seeing (a paradigm) is replaced.
- Science, Technology and Society: How Discoveries Change Our Lives – Science finds out how nature works; technology uses that knowledge to make tools and solve problems. Society shapes science too, by asking questions, paying for research and making rules. Big changes such as the printing press, the steam engine, electricity, vaccines and the internet changed how people work, live and think. Every technology has benefits and risks. To decide wisely we look at evidence, weigh benefits against risks, ask who gains and who loses, think about ethics and the future, and use safety rules.
3. Life
Characteristics of life · Humans and health · Evolution of life
- Characteristics of Life – Living things share a set of signs: they are made of cells, use energy (metabolism), respond to their surroundings, keep their inside steady (homeostasis), grow, reproduce, and as groups adapt over generations. Something is called alive only if it shows all of these. Viruses sit on the border because they copy themselves only inside a host cell.
- Humans and Health: How Medicine Changed – Ideas about health have changed over time: from blaming bad air to knowing that germs cause many diseases. New techniques and products (vaccines, scans, medicines) save lives, but each has benefits and drawbacks that we must weigh.
- Population Genetics: Gene Pools, Hardy–Weinberg and New Species – Population genetics studies how allele frequencies change in a population. The gene pool is all alleles of all individuals. For one gene with alleles A and a, p + q = 1. If a population is large, mates randomly, and has no migration, mutation or selection, the Hardy–Weinberg principle says frequencies stay the same and genotypes are p² (AA) + 2pq (Aa) + q² (aa) = 1. Any change from this means evolution is happening, caused by genetic drift (bottleneck, founder effect), gene flow, mutation, natural selection or non-random mating. A species, in the biological species concept, is a group whose members can interbreed: a shared gene pool. New species form when gene pools are cut off by reproductive isolation: allopatric (geographic barrier) or sympatric (same area, e.g. polyploidy, habitat or behaviour). One ancestor can split into many forms (adaptive radiation, divergence), while unrelated groups can evolve similar shapes (convergence).