#gcse science

[slipkin]

when ur gcse exams are tomorrow and youve done no revision no homework and u dont know what a ribosome is

[gcse-culture-is]

GCSE Culture is your English teacher calling William Wordsworth the daddy of romantic poetry.

[characterssaythedarnestthings]

"Like and subscribe, and hit the bell yo" - Shaun Donnelly, Freesciencelessons

[kryptidd]

The fact that aqa is only giving triple physics students 9 extra marks despite there being multiple high mark questions not on the topic list i.e static electricity, is so messed up

Suck my dick aqa don't need your fucking marks anyway <3

[perfectoontumb1r]

I hate science and everything about it but a YouTube channel/website has made it bearable for studying GCSE science. It's cognito. The website has simple videos and a small test at the end, but the YouTube channel is just the videos and they are pretty good for learning n stuff.

[improvetuition1]

Top GCSE Biology Tutor Online | Improvetuition

Improve tuition offers tutoring services for GCSE biology – The UK's top biology tuition service online . In this we cover all the subject and based on subject provide one by one gcse biology tutor online. We cover all the syallbus which you need to know. Our tutors are able to teach all areas of the curriculum comprehensively, enabling students to improve their grades while taking on a greater workload

[sleeping-circle-old]

Energy Stores ⚡🏪 - Physics

Magnetic energy store - the energy stored when poles attract or repel 🧲

E.g.: Fridge magnets, compasses, maglev trains which use magnetic levitation

Internal (thermal) energy store - the total kinetic and potential energy of the particles in an object aka the kinetic energy/vibrations of particles. Hotter object 🔥-> MORE internal energy (particles vibrate faster)

E.g.: Human bodies 🤾🏼, hot coffees ☕, stoves or hobs. Ice particles 🧊 too, just they vibrate slower.

Chemical energy store - the energy stored in chemical bonds, like the bonds between molecules

E.g.: Food, fuel, certain chemicals found in batteries

Kinetic energy store - the energy store of a moving object

E.g.: Any moving object, really

Electrostatic energy store - the energy stored when charges (protons+ & electrons-) attract/repel

Elastic potential energy store - the energy store of an object that is being squashed/stretched

Gravitational potential energy store - the energy of an object above the surface of the Earth 🌍 - the higher the object is, the higher its gravitational potential energy

E.g.: Planes ✈️, cups on tables 🍺, birds 🕊️, etc.

Nuclear energy store - the energy stored in the nucleus of an atom

E.g.: Uranium nuclear power, nuclear reactors

[horse-head-farms]

with stuff like “polyhermits” do people imagine it as a full mesh network (everyone is dating everyone else) or a partial mesh network (each person is dating multiple people who are themselves dating multiple other people etc so everyone is connected even if not directly involved with eachother)

[restlesshush]

To partake in personally, or just the fact it exists, or however you want to interpret the question

[igcse-bioworld]

[mrblazeflappybird]

Throwback to my old computer science teacher, who left when I was in Year 9, who told me before I knew I was trans that I should consider going into the computer science field because I was good at it and there wasn't enough woman in computer science.

And now I'm sitting here, now a full-fledged guy, having failed my computer science gcse and not considering taking that any further anyway

[sleeping-circle]

Types of energy transfer ⚡🔀 - Physics

You can read more about energy stores in my previous post - Energy Stores ⚡🏪 - Physics! 😊

What is energy transfer?

When we talk about energy transfer, we talk about energy from one energy store being transferred to another

Energy can remain in the same store for millions of years or just a fraction of a second

There are energy transfers happening all the time - every time there is a change is a system (an object/group of objects), there is a change in the way energy is stored

Transferring energy

There are four types of energy transfer:

Mechanical work 🦾 - the energy transfer of a force moving an object through a distance

Electrical work ⚡- energy transferred by charges moving due to a potential difference

Heating 🔥 - thermal energy transferred from a hotter 🔥region to a cooler 🧊 region

Radiation - energy transferred via waves (e.g.: sound 🔊 waves, light 💡radiation, infrared (heat) radiation)

Example of energy transfer: A falling ball

You are holding a metal ball that doesn't bounce. You drop it...

While the ball is falling:

The gravitational potential energy of the ball decreases 📉 AS

The kinetic energy of the ball increases 📈

As the ball is falling, some energy is transferred to the thermal energy of the surroundings (air)

When the ball hits the ground:

The gravitational potential energy of the ball hits zero AND

The kinetic energy of the ball hits zero AS

Energy is transferred to the surroundings via sound waves (there's a noise when the ball hits the ground) and heat (thermal energy store of surroundings 📈)

[gcse-culture-is]

gcse culture is hating your exam boards because it feels like they’re constantly lying to you

(this is a callout to aqa specifically for the food tests thing on paper 1)

[ace-and-the-rpg-horrors]

Rui would make binary bracelets for his mates, except he probably wouldn't tend to have tons of beads lying around so he strings different coloured hex nuts onto the thread instead

this makes them terribly uncomfy to wear but everyone he gives them to keeps them on anyway because they don't have the heart to be like "Rui/Kamishiro, i am not walking around with bits of metal dangling off of my wrist"

[justisco]

[uncontrolledfission]

day 80 of 100 days of productivity 💌

pretty simple day. we worked on domains and ranges in maths, then looked at Archimedes’ Principle in physics, then we had a revision lesson in computer science. i just spent the lesson working on my coding.

pictured is part of what i did. i was very proud, because this question came up in the very first CS assessment of the year and no one in the class got it. though it’s quite easy for us now, i’m very proud of myself for being able to write this entire program in one go, without testing once, and got it to work as desired. wahey!

i went home and revised for my computer science mock. i feel prepared and i’m happy-ish knowing i’ve really done as much as i can to revise, but i’m still terrified. wish me luck! :)

- J