Cells, osmosis and why cells stay small, explained with diagrams and real numbers. Each post goes with a letsBug video and ends with practice questions.
- Animal Cell vs Plant Cell: Differences, Table and Diagram: Animal cell vs plant cell, part by part: a clear difference table, a labelled diagram, magnification maths and the common mix-ups.
- Why are cells so small? Surface area to volume ratio: Why are cells so small? Work out the surface area to volume ratio of cubes and cuboids, see why it limits diffusion and meet the biggest cells.
- Osmosis Potato Practical: Percentage Change in Mass: What is osmosis? Why salt pulls water out of a cucumber, the potato practical with percentage change in mass, and osmosis vs active transport.
- Difference between xylem and phloem: which carries food?: Difference between xylem and phloem: xylem carries water up, phloem carries food up and down. With the celery experiment and why ring-barking kills.
- Effect of temperature on enzymes: does heat kill them?: Effect of temperature on enzymes: warmth speeds them up to an optimum, heat denatures them, cold only slows them. Plus the pineapple jelly test.
- Why is meiosis called reduction division? Mitosis vs meiosis: Why is meiosis called reduction division? It halves the chromosomes, 46 to 23. Mitosis vs meiosis, with diagrams and practice questions.
- Why are fungi not plants? Five kingdom classification: Why are fungi not plants? They lack chlorophyll, have chitin walls and absorb food. The five kingdoms, scientific names and practice.
More subjects: Maths · Physics · Chemistry · Geography · Code · Builds · System Design · Devlog. And how we check facts.
Comments
Post a Comment