Flashcards
Science Definitions
Flashcards do conjunto (24)
- 1Parts and categories of the nervous systemcentral, peripheral. brain, spinal cord, nerves.
- 2What does the endocrine system use?hormones
- 3where do the hormones come from in the endocrine system?thyroid gland (throat area), pituitary, hypothalamus, pineal glands (brain), adrenal gland (above kidneys.
- 4first line of defence barriers?hair, mucus, respiratory system, skin, stomach acids, tears, lysosomes.
- 5second line of defence barriers?non specific white blood cells (phagocytes), fever
- 6third line of defence barriers?specific white blood cells
- 7how does the immune system know when the body is infected?When the white blood cells identify an unfamiliar marker on a cell.
- 8what do b cells do?they make copies of antibodies to defeat antigens and release them into the bloodstream. they also create b memory cells which stay until the body encounters the same antigen again and they have the antibody ready to go.
- 9What to never do when drawing a line of best fit?connect the dots.
- 10What acronym do you use when creating a line graph?SPLAT
- 11What does splat stand for?Scale, Plot, Label & LOBF, Axis, Title
- 12What is the independent variable?The variable you change to see what happens.
- 13What is the dependent variable?The result you measure.
- 14What is the controlled variable?The variables you keep the same.
- 15what is reliablility when reviewing an investigation?consistency of results when repeated.
- 16What is validity when reviewing an investigation?Are there controlled variables included? Have all controlled variables been considered?
- 17What is accuracy when reviewing an investigation?How close the measurements are to the true value. The amount of error and mistakes made.
- 18Law of conservation of energyThe idea that energy cannot be created or destroyed, only transformed.
- 19Forms of energyChemical potential energy, gravitational potential energy (GPE), nuclear potential energy, elastic potential energy (EPE), kinetic, thermal, light, mechanical, sound.
- 20ConductionTransfer through direct contact.
- 21ConvectionTransfer by movement of fluids or gas.
- 22RadiationTransfer by electromagnetic waves.
- 23Energy Efficiency Formulauseful output
--------------------------- X 100%
total energy input - 24—
Informações
- Descrição
- Definitions and notes for 2025 year 9 semester exam
- Criado por
- Sophie Scott
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