My Chemistry Coloring book: Colouring for adults, cells, neurons, bacteria illustrations

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We are going to use chromatography to separate these different food colourings into the coloured pigments they are made from. Dip your finger in the cup of cold tap water to get a drop on the end and let it fall onto one of the coloured dots. The activity shows children how chromatography can be used as a separation technique – in this case as a way of separating mixtures of dyes and colours. Practical considerations Because electromagnetic radiation travels at a constant speed, each wavelength corresponds to a given frequency, which is the number of times per second that a crest passes a given point. Longer waves have lower frequencies, and shorter waves have higher frequencies. Frequency is commonly reported in hertz (Hz), meaning ‘cycles per second’, or ‘waves per second’. The standard unit for frequency is s -1. Christmas Jumper Day is an event organised by Save the Children to raise money to help safeguard children and give them a better life.

This lovely set of mindfulness colouring sheets feature a selection of different science images. Great for a variety of activities, you can use them to reinforce fine motor skills, as inspiration for class discussions, or just for fun! Try putting the finished pictures up on display, or let kids take them home to show off their masterpieces. This makes revising groups and elements a fun an engaging task, as well as helping tie it into Christmas Jumper Day with a festive twist. where ν(the Greek letter ‘ nu’) is frequency in s -1. Visible red light with a wavelength of 700 nm, for example, has a frequency of 4.29 x 10 14 Hz, and an energy of 40.9 kcal per mole of photons. The full range of electromagnetic radiation wavelengths is referred to as the electromagnetic spectrum. Drawing conclusions and raising further questions that could be investigated, based on their data and observations. Evan Darzi, Creator of the Organic Coloring Book series and Contributor to QRChem / Post-Doctoral Researcher, UCLAHigh-energy radiation (such as gamma- and x-rays) is composed of very short waves – as short as 10 -16 meter from crest to crest. Longer waves are far less energetic, and thus are less dangerous to living things. Visible light waves are in the range of 400 – 700 nm (nanometers, or 10 -9 m), while radio waves can be several hundred meters in length. The colour of inks and other coloured objects can be made up of a mixture of multiple colours and dyes. Or for some more science word fun, you could try this Science Word Unscramble activity. Can your child work out which word has been scrambled up? This task is great for developing your kid’s problem-solving skills! What is mindfulness?

You will notice that the paper absorbs the water and it rises up the chromatography paper past the spots of food colouring. When the water reaches the spots, the pigments will dissolve in the water and move up the paper. Stand the tube on a white surface and shine the torch through the opening and look down the top of the tube. Jason Chari, Creator of VRChem and the O-Chem (Re)Activity Book / Contributor to QRChem / Student, UCLA

This happens because some pigments are more soluble than others. The more soluble the pigment is, the longer it stays dissolved in the water and the further it travels up the paper. When talking about electromagnetic waves, we can refer either to wavelength or to frequency - the two values are interconverted using the simple expression: Choose a stencil pattern and colour-in the dots using a selection of colours, or design your own using a series of dots. Use this Colour by Symbols: Elements activity with your science classes on Christmas Jumper Day to help them revise groups on the periodic table while creating a colourful Christmas jumper. Place a small spot of the coloured mixture you are investigating onto the pencil line and allow it to dry.

Put some water into your beaker just deep enough that the very end of the paper goes into the water. Follow these steps to try out standard chromatography. You will need: a pencil, a ruler, a piece of paper, a coloured mixture such as a food dye. You might like to add spots of some pure coloured pigments alongside it, so that you can see if they are present in the mixture.This activity can form the basis for a group discussion where children look at how dyes and colours in pens and sweets are made. Alternatively, the resource can be used to generate questions and discussions around the topics of light, or dissolving and reversible changes. In a spectroscopy experiment, electromagnetic radiation of a specified range of wavelengths is allowed to pass through a sample containing a compound of interest. The sample molecules absorb energy from some of the wavelengths, and as a result jump from a low energy ‘ground state’ to some higher energy ‘excited state’. Other wavelengths are not absorbed by the sample molecule, so they pass on through. A detector on the other side of the sample records which wavelengths were absorbed, and to what extent they were absorbed.