| Balanced forces | Two equal forces acting in opposite directions that cancel each other out. |
| Balanced diet | A diet that gives the body the right amounts of all types of food. |
| Cells | Tiny bits that all living things are made from. |
| Electrical conductor | Something that lets electricity pass through. |
| Thermal conductor | Something that lets heat pass through. |
| Consumer | Something in a food chain that consumes food. |
| Dissolve | This is when a solid mixes into a liquid and just leaves a new liquid. |
| Evaporation | When a liquid warms up and starts to turn into a gas – not the same as boiling. |
| Excretion | Plants or animals getting rid of waste substances. |
| Fertilisation | When sperm joins with egg – or pollen joins with ovule. |
| Food chain | A diagram which shows the flow of energy from organism to organism. |
| Friction | The force that gives us grip. |
| Impermeable | Something that doesn't let water through. |
| Electrical insulator | Something that won't let electricity pass through it. |
| Light source | Something that gives out its own light. |
| Material | What something is made of. |
| Newton meter | A spring balance used to measure force. |
| Nutrition | Plants and animals getting food so that they can grow. |
| Organ | Part of the body with a special job to do. |
| Particles | Really really tiny bits that everything is made from. |
| Pollination | Getting pollen from a flower to the stigma on another flower. |
| Producer | An organism in a food chain that makes its own food. |
| Reversible | A change that can be made to go the other way. |
| States | Solid, liquid and gas are the three ***** something can be in. |
| Upthrust | The force which pushes back up from water, air or a solid surface. |
| Organism | Living thing, animal or plant. |
| Ovary | Where eggs are made. |
| Photosynthesis | Making food from carbon dioxide and water – needs chlorophyll and sunlight. |
| Pollen | The male part of a plant that goes to make a new seed. |
| Pollination | Getting pollen to the stigma. |
| Predator | Animals that eat other animals. |
| Prey | An animal killed and eaten by a predator. |
| Protein | A food that builds muscle. |
| Puberty | When the body changes and develops between 10 and 18 years old. |
| Pulse | The rhythm of the heart beating. |
| Pulse rate | How many times the heart beats in a minute. |
| Relax | When a muscle gets longer. |
| Reproduction | Making a new generation. |
| Respiration | Using oxygen to turn food into energy. |
| Ribs | The bones in the chest that protect the heart and lungs. |
| Root | Part of a plant under the ground that takes in water. |
| Sepal | Protects the petals when the flower is still in the bud. |
| Side effect | Something that happens as well as something that was supposed to happen. |
| Skull | The bones that protect the brain. |
| Spine | The backbone. |
| Stamen | The male part of the flower. |
| Starch | A type of carbohydrate – eg. In pasta. |
| Stem | Holds a plant upright. |
| Stigma | At the top of the carpel, where pollen lands. |
| Style | The bit that holds up the stigma. |
| Sugar | A type of carbohydrate, e.g. honey. |
| Tendon | Joins muscle to bone. |
| Variation | Differences in living things. |
| Vein | Takes blood back to the heart. |
| Vertebrate | Animal with a back bone. |
| Virus | A type of microbe. |
| Air | A mixture of gases including oxygen. |
| Boiling temperature | Temperature at which a liquid changes into a gas. |
| Carbon dioxide | A gas that's found in the air. |
| Chemical change | A change that cannot be undone. |
| Condensation | When water vapour cools and turns into a liquid. |
| Decant | Letting solids settle to the bottom and pouring off the liquid very carefully. |
| Dilute | A solution with a high percentage of water in it. |
| Fabric | Made from fibres spun and woven together. |
| Filter | Separate solid bits from a liquid. |
| Freeze | When a liquid gets cold and turns into a solid. |
| Gas | One of the three states a material can be in. Can flow and change volume. |
| Irreversible | A change that can't be undone. |
| Liquid | A state a material can be in. Can change shape, flow but not change volume. |
| Magnetic | A material that's attracted to a magnet. |
| Force | A push or pull |
| Repel | Push apart |
| Melt | When a solid warms up and turns into a liquid. |
| Mixture | Two or more substances mixed together – that can be separated. |
| Oxygen | A gas in the air that our bodies need to keep us alive. |
| Permeable | Allows water to go through it. |
| Property | A quality of a material, like 'hard', 'shiny', 'conducts electricity' etc. |
| Pure | Not mixed with anything else. |
| Irreversible | A change that cannot be made to go the other way. |
| Room temperature | The temperature indoors, usually 20 degrees C |
| Solid | One of the states a material can be in – Keeps its shape and you can hold it. |
| Solidify | When something turns into a solid. |
| Solution | A mixture of solid and liquid. You can't see the solid, but it is still there. |
| Temperature | How hot or cold something is. |
| Thermal conductor | Something that lets heat pass through it easily. |
| Thermal insulator | Something that won't let heat pass through it easily. |
| Thermometer | Something we use to measure temperature. |
| Undissolved | Excess solid that hasn't dissolved. |
| Water cycle | Water in the air condenses and falls as rain and flows to the sea where the sun evaporates it... again and again... |
| Artery | Blood vessel carrying food and oxygen to the body cells. |
| Adapted | Suited to the environment where the organism lives. |
| Canines | Pointed teeth that tear food. |
| Carbohydrate | Food that gives the body energy. |
| Carpel | The female part of the flower. |
| Carnivore | Animal that only eats other animals. |
| Chlorophyll | The green stuff in plants that allows it to carry out photosynthesis. |
| Classification | Grouping similar organisms together. |
| Contract | When a muscle gets shorter. |
| Dispersal | Spreading seeds far away from the parent plant. |
| Food web | A lot of food chains linked up. |
| Germ | A non scientific word for microbe. |
| Germination | When a seed starts to grow. |
| Habitat | Where an organism lives. |
| Herbivore | An animal that only eats plants. |
| Incisors | Teeth that cut food. |
| Key | A set of questions that help you identify an unknown plant, animal or material. |
| Life cycle | The stages an organism goes through right from fertilisation to death. |
| Micro-organism | A very tiny living thing. |
| Minerals | Needed by plants to help them grow. |
| Muscles | These pull on bones to make you move. |
| Air Resistance | The air pushing back against you when you move through it. |
| Axis | An imaginary line through the earth from the North Pole to the South Pole. |
| Battery | More than one cell in a circuit - where the electricity comes from. |
| Cell | Forms part of a battery in a circuit. |
| Circuit Diagram | A diagram with symbols that shows all of the components in a circuit and how they are connected. |
| Symbol | Used in a circuit diagram instead of a picture to represent a component. |
| Complete | What a circuit must be to allow the flow of electricity. |
| Component | Something that does a job in a circuit. e.g. bulb, buzzer, or motor. |
| Ear drum | The part of the ear that vibrates to allow us to hear sound. |
| Forcemeter | Another name for a Newton meter - Used to measure force. |
| Gravity | Force that pulls us towards the centre of the earth. |
| Light ray | Light travelling - always in a straight line. |
| Mirror | Something that reflects light very well. |
| Newton | The unit we measure force in. |
| Opaque | Does not let light through. |
| Orbit | The path an object takes around another object in space. |
| Periscope | Device with two mirrors that lets you see over the top of things. |
| Pitch | How high or low a sound is. |
| Reflection | When light bounces off a smooth shiny surface. |
| Rotate | To go round and round on an axis. |
| Shadow | When light is blocked by something opaque. |
| Solar system | The Sun, the Earth and the other planets. |
| Sound | Made by something vibrating. |
| Sphere | The shape of the Earth. |
| Spin | The same as rotate. |
| Sunrise | When the Earth moves round so that an area, previously in darkness, is lit by the Sun. |
| Sunset | When a part of the Earth, previously lit by the Sun is plunged into darkness due to the Earth's rotation. |
| Surface area | The measurement of the outer surface of an object. |
| Switch | Allows you to make a gap in a circuit and close it again to control the flow of electricity. |
| Tension | The amount of pull in the length of a string - How tight it is. |
| Tight | When a string has a lot of tension you would describe it as... |
| Tuning | Changing the length or the tension of a string to change the pitch of the sound it makes. |
| Vacuum | Where there is no air. |
| Vibration | The way something moves to make it produce a sound. |
| Water resistance | Water pushing you back as you try to move through it. |
| Weight | The force pulling down on something due to gravity. |
| Observation | The act of noting and recording something. |
| Measurement | The dimension, quantity, or capacity determined by measuring. |
| Table | Used to record results from an investigation in columns and rows to allow them to be easily read. |