Year 7 Exam Revision
Biology
7 Characteristics of Living things
MRS NERG or MRS GREN –
Green Plant make food from Carbon Dioxide and Water
Animals obtain food from other living things.
The five main parts of a plant are the: Know their function/job
Root Stem Leaf Flower Bud
The 7 major organ systems ( know these and their function/job)
Skeletal – Bones
Muscular – Muscles
Circulatory – Heart / Blood
Respiratory – Breathing
Digestive – Stomach
Nervous – Brain – spinal cord
Excretory – Riding waste
Sensory - Seeing, hearing – senses.
Endocrine – Releases hormones from galnds.
Cells
Know the three basic parts of cell and their function
Micro- organisms
Be able to give example of
Chemistry
States of Matter
The particle theory (PT) explains how the matter in the different states
Solids – Has a definite shape, mass and its volume does not change. Does not flow, hard to compress
PT = Particles vibrate to and fro a little, little energy.
Liquids - Has a definite mass and its volume does not change. Hard to compress but does flow. Shape varies and depends on shape of container.
PT = Particles have some freedom to move and can move around each other. Some energy.
Gas – Has a definite mass, volume can vary and takes up shape of container. Can flow and be compressed.
PT = Particles move freely and at high speed.
Melting – Solid to Liguid
Evaporation – Liquid to Gas
Condensation – Gas to liquid.
Sublimation – Solid straight to gas.
Physics
Energy
There are two types of Energy, Potential and Kinetic
Potential energy – This is energy that is stored and can be used.
Types of Potential energy are
Energy Conservation – Energy cannot be created or destroyed it can only be changed from one form to another
Examples
7 Characteristics of Living things
MRS NERG or MRS GREN –
Green Plant make food from Carbon Dioxide and Water
Animals obtain food from other living things.
The five main parts of a plant are the: Know their function/job
Root Stem Leaf Flower Bud
The 7 major organ systems ( know these and their function/job)
Skeletal – Bones
Muscular – Muscles
Circulatory – Heart / Blood
Respiratory – Breathing
Digestive – Stomach
Nervous – Brain – spinal cord
Excretory – Riding waste
Sensory - Seeing, hearing – senses.
Endocrine – Releases hormones from galnds.
Cells
Know the three basic parts of cell and their function
- Cell Membrane
- Nucleus
- Cytoplasm
- Cell wall
- Chloroplast
Micro- organisms
Be able to give example of
- Fungi - Athletes food, mushrooms, yeast
- Bacteria – Harmful, salmonella – Useful, Yoghurt
- Viruses – influenza/flu,
Chemistry
States of Matter
The particle theory (PT) explains how the matter in the different states
Solids – Has a definite shape, mass and its volume does not change. Does not flow, hard to compress
PT = Particles vibrate to and fro a little, little energy.
Liquids - Has a definite mass and its volume does not change. Hard to compress but does flow. Shape varies and depends on shape of container.
PT = Particles have some freedom to move and can move around each other. Some energy.
Gas – Has a definite mass, volume can vary and takes up shape of container. Can flow and be compressed.
PT = Particles move freely and at high speed.
Melting – Solid to Liguid
Evaporation – Liquid to Gas
Condensation – Gas to liquid.
Sublimation – Solid straight to gas.
Physics
Energy
There are two types of Energy, Potential and Kinetic
Potential energy – This is energy that is stored and can be used.
Types of Potential energy are
- Gravitational energy – If an object is lifted above the surface of he earth it possess gravitational potential energy.
- Elastic or strain energy – When an object can be squashed, stretched or bent it gains elastic potential energy.
- Chemical energy – Energy can be stored in chemicals from which it is made examples are, food, batteries and wood.
- Sound energy – Sound energy is produced by particles moving back and forward in an object.
- Electrical energy – Electric current is the movement of electric charges through a conductor, ie copper wires.
- Light Energy – A form of energy that travels through space in waves.
- Thermal energy/ heat energy – Energy given off by heat. The more energy the particles in an object have the more heat they give out. Think about how the particles in gas behave compared to a solid!
Energy Conservation – Energy cannot be created or destroyed it can only be changed from one form to another
Examples
- When you turn on a light, electrical energy is changed into light energy and heat energy.
- When you play a guitar, chemical energy in your body is changed to kinetic energy and sound energy.