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Brainlag

Science Essentials

For ages 14–16, GCSE level

Similar to US grades 9–10 (high school) and IB MYP years 4–5

Biology, chemistry and physics, with answers marked as you go.

Free Unit 1, Cell biology

Start here

209 lessons Unit 1 free

Combined scienceSeparate sciences

BiologyChemistryPhysics

Combined science or separate sciences?

Not sure? Ask your teacher. Most students take combined.

Practice

Revise next

    How this works

    Picked from your answers on this device and your account: topics you are still learning, and secure ones you have not practised for a while. The bars show how sure you are on each one. It is not a grade.

    Mistakes

    Lesson cards

    All decks

    Due today:

    Mixed practice

    10 questions across the course.

    Start mixed practice

    What you’ll be able to do

    The course, unit by unit

    Tier

    Part 1: Biology

    8 units, 59 lessons

    1. Unit 1: Cell biology

      2 hr 15 minFree unit

    2. Unit 2: Organisation: tissues, organs, digestion and circulation

      3 hr 15 minLocked

    3. Unit 3: Infection and response

      2 hr 40 minLocked

    4. Unit 4: Bioenergetics: photosynthesis and respiration

      2 hr 50 minLocked

    5. Unit 5: Homeostasis and response

      3 hr 20 minLocked

    6. Unit 6: Inheritance, variation and evolution

      3 hrLocked

    7. Unit 7: Ecology

      3 hrLocked

    8. Unit 8: Required practicals and maths skills

      2 hr 20 minLocked

    Part 2: Chemistry

    11 units, 68 lessons

    1. Unit 9: Atomic structure and the periodic table

      2 hr 30 minLocked

    2. Unit 10: Bonding, structure and the properties of matter

      2 hr 10 minLocked

    3. Unit 11: Quantitative chemistry and the mole

      2 hr 10 minLocked

    4. Unit 12: Chemical changes: reactivity, acids and electrolysis

      2 hr 40 minLocked

    5. Unit 13: Energy changes

      1 hr 40 minLocked

    6. Unit 14: Rates of reaction and equilibrium

      2 hr 40 minLocked

    7. Unit 15: Organic chemistry

      2 hr 40 minLocked

    8. Unit 16: Chemical analysis

      1 hr 45 minLocked

    9. Unit 17: The Earth's atmosphere

      2 hr 40 minLocked

    10. Unit 18: Using resources

      2 hr 25 minLocked

    11. Unit 19: Required practicals and maths skills

      2 hr 5 minLocked

    Part 3: Physics

    13 units, 82 lessons

    1. Unit 20: Energy stores, transfers and efficiency

      2 hr 35 minLocked

    2. Unit 21: Electric circuits

      2 hr 10 minLocked

    3. Unit 22: Mains electricity, the National Grid and static

      2 hr 10 minLocked

    4. Unit 23: Particle model, density and gas pressure

      2 hr 35 minLocked

    5. Unit 24: Atomic structure and radioactivity

      2 hr 15 minLocked

    6. Unit 25: Forces, work, elasticity, moments and pressure

      2 hr 20 minLocked

    7. Unit 26: Forces and motion

      2 hr 40 minLocked

    8. Unit 27: Momentum

      1 hr 55 minLockedHigher

    9. Unit 28: Waves and the electromagnetic spectrum

      2 hrLocked

    10. Unit 29: Lenses, visible light, sound and black bodies

      2 hr 50 minLockedPhysics only

    11. Unit 30: Magnetism and electromagnetism

      2 hr 15 minLocked

    12. Unit 31: Space physics

      2 hr 15 minLockedPhysics only

    13. Unit 32: Required practicals, maths skills and the equations

      3 hr 15 minLocked

    Separate science extras

    Topics only in the separate sciences, so not part of Combined science. Open any of them if you want to.

    Biology: 7 lessons
    Chemistry: 17 lessons
    Physics: 24 lessons

    Practice exams and topic tests

    A topic test ends every unit. Practice exams are timed at full exam length and marked when you hand them in.

    7 more practice exams

    Revise and practise alongside

    Questions

    Does Science Essentials match my course at school?

    It covers the topics of the courses on the Helps with line at the end of this page, as a complete course of its own. Higher-only lessons are marked; Foundation above hides them.

    Is it for Combined science or the separate sciences?

    Both. Separate-science lessons are marked; Combined above hides them.

    What is free?

    All of the first unit, Cell biology (6 lessons), the first screen of every other lesson, and each unit's topic test.

    Do I need an account?

    No. Progress saves in this browser; sign in to keep it on every device.

    How long does it take?

    About 79 hr 20 min of lessons in 32 units. Lessons take 15 to 30 minutes each.

    Helps with: GCSE (AQA, Edexcel, OCR), Cambridge IGCSE

    AQA, Pearson Edexcel and OCR are trade marks of their owners. Brainlag is independent of every exam board; all questions are original.