means very high risk of harm from unprotected sun exposure. Minimize sun exposure during midday hours, from 10 AM to 4 PM. Protect skin by liberally applying a sunscreen with an SPF of at least 15. Wear protective clothing and sunglasses to protect the eyes.

beads | Sigma-Aldrich - MilliporeSigma Fluorescent beads | Sigma-Aldrich - MilliporeSigma

Horspool, D. R., Coope, R. J. N. & Holt, R. A. Efficient assembly of very short oligonucleotides using T4 DNA Ligase. BMC Res. Notes 3, 291. https://doi.org/10.1186/1756-0500-3-291 (2010). Encourage students to stay safe in the sun with a collection of activities to discover the science behind sunscreen. Picelli, S. et al. Tn5 transposase and tagmentation procedures for massively scaled sequencing projects. Genome Res. 24, 2033–2040 (2014). Students can use UV Beads to conduct investigations on how technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture energy. Begin by preparing an emulsion that will serve as the base cream of your sunscreen. Add the oily phase ingredients to a 250 ml beaker: 15 g lanette wax, 7 g sweet almond oil and 7 g liquid paraffin. Weigh out the ingredients using an electronic balance.Construct an explanation based on valid and reliable evidence obtained from a variety of sources (including students' own investigations, models, theories, simulations, peer review) and the assumption that theories and laws that describe the natural world operate today as they did in the past and will continue to do so in the future. UV beads are beads that change colour when exposed to UV light. Dangerous ultraviolet (UV) light can be revealed using these beads. UV Beads contain pigments that turn different colours when exposed to UV light. The beads are white in ordinary, visible light but in UV light, you’ll see different colours depending on the pigment added to each bead. The beads will change from white to a colour about 50,000 times before the pigment will no longer respond to UV light. Compare the energies of UV light to IR and visible light. Explain why UV light is potentially more dangerous than IR or visible light.

Colour Change UV Beads | Mad About Science Colour Change UV Beads | Mad About Science

Design a solution to a complex real-world problem, based on scientific knowledge, student-generated sources of evidence, prioritized criteria, and tradeoff considerations.

Activity 1: An introduction to UV protection

In addition to being classified according to their SPF and UVA protection, sunscreens can be grouped depending on whether their active ingredients are organic or inorganic. Organic UV filters are a group of carbon-containing compounds that absorb UV radiation and convert it to heat energy. Inorganic filters, on the other hand, are a group of mineral oxides such as zinc oxide and titanium dioxide, which reflect UV radiation.

4: Detection and Absorption of Ultraviolet Light (Experiment)

Photochromism: a light-induced reversible change of colour. For example, clear eye glass lenses that transition to dark lenses. UV Beads - contain pigments that turn colours when exposed to UV light. UV Beads are the perfect tool for understanding how solar radiation can be harmful and to recognise measures that can be taken to reduce the risks associated with exposure to sunlight. Yan, Z., Clark, I. C. & Abate, A. R. Rapid encapsulation of cell and polymer solutions with bubble-triggered droplet generation. Macromol. Chem. Phys. 218, 1600297 (2017).

Pupils should take measurements, using a range of scientific equipment, with increasing accuracy and precision, taking repeat readings when appropriate. Which base cream ingredients are soluble only in water? Which are soluble only in oil? Justify your answers in relation to the polarity of the substance. Martin, M. Cutadapt removes adapter sequences from high-throughput sequencing reads. EMBnet J. 17, 5–7 (2011).