Dissolving, Mixtures and Changes of State - Teacher Explanation is part of the lesson Dissolving, Mixtures and Changes of State    Students will learn about dissolving, mixtures and changes of state as part of their learning about properties and changes of materials, as specified by the national curriculum in England: science programmes of study.

<p>Welcome to lesson 5.8 on 'Reversible Changes', which delves into dissolving mixtures and changes of state within the Year 5 Unit on Properties and Changes of materials. This lesson aligns with the National Curriculum, demonstrating how dissolving, mixing, and changes of state can be reversible. Students will explore and group everyday materials based on their properties such as hardness, solubility, transparency, and conductivity, and will also investigate their responses to magnets. For safety, it is essential that students wear goggles during the activities, stand rather than sit, keep chairs tucked under desks, tie back long hair, and ensure walkways are clear of bags. Given that some chemicals used can irritate the skin, wearing safety gloves is advisable, especially for those with skin sensitivities. Hot water will be used, but only teachers should handle it, and pupils must wait for it to cool before dismantling equipment. Any spills must be cleaned promptly to prevent slipping, and handwashing after the activities is mandatory, particularly for those with food allergies.</p>

<p>The lesson's practical component involves creating solutions by dissolving substances in water. Students will discover that not all substances dissolve in water, and they will use soil, sand, sugar, salt, and water to conduct experiments. The activity instructs students to half-fill cups with water and then attempt to dissolve various substances, stirring and observing whether the substance settles or dissolves. Through this, students learn the difference between soluble and insoluble materials and the concept of a saturated solution. The experiment will also reveal that sugar and salt are attracted to water and will fill the gaps between water molecules until no more can be dissolved. This lesson also offers cross-curricular links with ICT, maths, and history, encouraging students to research topics such as the contents of seawater, create line graphs of experimental results, and delve into the history of metalworking during the Bronze and Iron Ages.</p>

Dissolving, Mixtures and Changes of State - Lesson Plan is part of the lesson Dissolving, Mixtures and Changes of State    Students will learn about dissolving, mixtures and changes of state as part of their learning about properties and changes of materials, as specified by the national curriculum in England: science programmes of study.

Dissolving, Mixtures and Changes of State - Lesson Plan

Dissolving, Mixtures and Changes of State - Objectives Labels is part of the lesson Dissolving, Mixtures and Changes of State    Students will learn about dissolving, mixtures and changes of state as part of their learning about properties and changes of materials, as specified by the national curriculum in England: science programmes of study.

Objectives Labels

Dissolving, Mixtures and Changes of State - Objectives Labels

Dissolving, Mixtures and Changes of State - Results Tables is part of the lesson Dissolving, Mixtures and Changes of State    Students will learn about dissolving, mixtures and changes of state as part of their learning about properties and changes of materials, as specified by the national curriculum in England: science programmes of study.

Results Tables

Dissolving, Mixtures and Changes of State - Results Tables

Dissolving, Mixtures and Changes of State - Presentation is part of the lesson Dissolving, Mixtures and Changes of State    Students will learn about dissolving, mixtures and changes of state as part of their learning about properties and changes of materials, as specified by the national curriculum in England: science programmes of study.

Dissolving, Mixtures and Changes of State - Presentation

Dissolving, Mixtures and Changes of State - Self Assessment is part of the lesson Dissolving, Mixtures and Changes of State    Students will learn about dissolving, mixtures and changes of state as part of their learning about properties and changes of materials, as specified by the national curriculum in England: science programmes of study.

Self Assessment

Dissolving, Mixtures and Changes of State - Self Assessment

<p>This lesson focuses on teaching pupils how to demonstrate that dissolving, mixing, and changes of state are reversible changes. They will learn how to compare and group everyday materials based on properties such as hardness, solubility, transparency, conductivity, and response to magnets. This lesson covers topics learned in previous years including states of matter, properties of everyday materials, and how to change the shape of solid objects.</p> <p>The cross-curricular links include ICT, where pupils can research the contents of seawater, and Maths, where pupils can create graphs of their experimental results. Additionally, pupils can learn about the history of metalworking and the transition from Bronze to Iron Age. Some common misconceptions, such as pure orange juice being a pure substance and air being a single substance, will be corrected in this lesson.</p> <h2>Keywords</h2> <ul> <li>Solute</li> <li>Solvent</li> <li>Solution</li> <li>Dissolving</li> <li>Soluble</li> <li>Insoluble</li> <li>Saturated</li> <li>Mixture</li> <li>Reversible</li> </ul> <h2>Influential Scientists</h2> <ul> <li>Mary Maynard</li> <li>Daly</li> <li>Linus Pauling</li> <li>Rosalind Franklin</li> <li>Stephanie Kwolek</li> </ul> <h2>Important Lesson Guidance</h2> <p>Citric acid and bicarbonate of soda are needed for the activity and can be obtained from a local secondary school or online. Bicarbonate of soda can also be purchased from a local supermarket.</p> <h2>Activity: Making a Solution</h2> <p>In this activity, each pupil in the group will be given a clear plastic cup and a solid such as salt, sugar, sand, or soil. They will fill the cup with half water, add one teaspoon of the solid, and observe if the solid dissolves. The group will share their results and fill in the table to determine if the solid is soluble or insoluble.</p> <h2>Activity: Solubility of Solutes</h2> <p>In this activity, each pupil will have their own cup, solute (salt, bicarbonate of soda, granulated sugar, or citric acid), and a set of measuring cylinders. They will measure 30ml of water, add a flat teaspoon of the solute, and stir well. The pupils will observe the water to see if the solute has dissolved and repeat the process until the saturation point is reached. The pupils will record their results and rank the solubility of each solute.</p> <p>The science behind this activity is explained by the solutes moving into the gaps between water particles when they dissolve. Once the spaces are filled, no more solute can dissolve and the saturation point is reached. The pupils will learn that the four solids being tested are solutes and the water is the solvent.</p>

Dissolving, Mixtures and Changes of State

Science

Year 5

Properties and Changes of Materials

Dissolving, Mixtures and Changes of State - Teacher Explanation

Pzaz is a specialist, primary science provider, with schemes written for the non-specialist primary teacher. Created by a science education expert, Pzaz covers every statement of the National Curriculum for Reception to Year 6.