Science · Year 3 · Light and Shadows: Chasing the Sun · Summer Term

Sun Safety and Protection

Students will learn about the dangers of direct sunlight and the importance of protecting their eyes and skin.

• National Curriculum Attainment Targets
• KS2: Science - Light

About This Topic

Sun safety focuses on the risks of ultraviolet (UV) radiation from direct sunlight, which can harm skin and eyes. Year 3 students explore how UV rays cause sunburn, premature skin aging, and long-term risks like skin cancer, while bright light strains eyes and may lead to conditions such as cataracts. They learn practical protections: applying broad-spectrum sunscreen, wearing hats, sunglasses, and UV-protective clothing, seeking shade during peak hours (10am-4pm), and understanding the UV index. This ties into the light unit by examining sunlight as a powerful light source that travels in straight lines and casts shadows for protection.

In the UK National Curriculum for KS2 Science, this topic integrates health education with light properties, fostering skills in risk analysis and evidence-based decision-making. Students connect observations of shadows and light intensity to personal safety, preparing for broader discussions on environmental health.

Active learning suits sun safety perfectly because students engage directly with UV-sensitive materials, simulate protection scenarios, and create awareness posters. These methods make invisible dangers visible, encourage peer teaching, and build habits through reflection and application.

Key Questions

1. Explain how we can protect our eyes from the power of the sun.
2. Analyze the risks of prolonged exposure to direct sunlight.
3. Design a poster to educate others about sun safety.

Learning Objectives

• Identify the primary sources of UV radiation and explain how they affect skin and eyes.
• Analyze the effectiveness of different sun protection methods, such as sunscreen SPF, hats, and sunglasses.
• Design a public service announcement poster illustrating key sun safety messages for peers.
• Compare the risks associated with prolonged sun exposure during peak hours versus early morning or late afternoon.

Before You Start

Properties of Light

Why: Students need to understand that light travels in straight lines and can be blocked to grasp how shadows offer protection.

Materials and Their Properties

Why: Understanding that different materials block light and heat helps students comprehend why certain clothing or hats are more effective for sun protection.

Key Vocabulary

Ultraviolet (UV) radiation	Invisible rays from the sun that can damage skin and eyes, causing sunburn and increasing the risk of skin cancer.
Sunburn	Red, sore, and sometimes blistered skin caused by overexposure to the sun's UV rays.
SPF (Sun Protection Factor)	A measure of how well a sunscreen protects skin from the sun's UVB rays, with higher numbers offering more protection.
Peak sun hours	The times of day, typically between 10 am and 4 pm, when the sun's UV rays are strongest and most harmful.
Shade	An area protected from direct sunlight, offering a natural way to reduce exposure to UV radiation.

Watch Out for These Misconceptions

Common Misconception

The sun is only dangerous on hot, sunny days.

What to Teach Instead

UV rays penetrate clouds and cause damage even on cool or overcast days. Hands-on UV bead tests under different conditions reveal this, prompting students to revise ideas through shared data and discussion.

Common Misconception

A tan means healthy skin.

What to Teach Instead

Tanning signals skin damage from UV exposure. Role-plays contrasting tanned and protected skin help students visualise risks, while group debates build understanding of long-term harm.

Common Misconception

Sunglasses are just for fashion.

What to Teach Instead

They block harmful UV rays protecting eyes from strain and damage. Testing light intensity through various lenses in pairs clarifies function, reinforcing protection via direct comparison.

Active Learning Ideas

Demonstration: UV Bead Experiment

Provide UV beads that change colour in sunlight. Students predict changes, expose beads outdoors or under UV light, then test with sunscreen, fabric, or glass. Discuss results to show UV penetration and protection effectiveness.

30 min·Whole Class

Pairs: Protection Role-Play

Pairs act out sun exposure scenarios like playground or beach time, demonstrating unsafe behaviours then correct protections. Switch roles and peer-assess using a checklist. Debrief as a class on key rules.

25 min·Pairs

Small Groups: Safety Poster Design

Groups research protections via fact sheets, then design A3 posters with drawings, slogans, and labels. Present to class for feedback. Display posters around school to educate others.

45 min·Small Groups

Individual: Shadow Tracker

Each student marks their shadow hourly on paper outdoors, noting changes with sun position. Analyse how longer shadows indicate safer times. Share findings to link shadows with shade protection.

20 min·Individual

Real-World Connections

• Lifeguards at beaches and swimming pools must wear protective clothing and hats, and apply high SPF sunscreen regularly to prevent sunburn and long-term skin damage during their shifts.
• Farmers and construction workers who spend long hours outdoors often develop specific work-related safety protocols, including wearing wide-brimmed hats and UV-protective clothing, to manage their sun exposure.
• Optometrists and ophthalmologists advise patients to wear sunglasses that block 100% of UV rays to protect their eyes from damage that can lead to cataracts and other vision problems.

Assessment Ideas

Exit Ticket

Provide students with a card asking: 'Name two ways to protect your skin from the sun and one way to protect your eyes.' Collect these to check for understanding of key protective measures.

Discussion Prompt

Pose the question: 'Why is it important to wear a hat even when you are wearing sunscreen?' Facilitate a class discussion, guiding students to explain that sunscreen protects skin, but hats also protect the scalp, face, and neck, and can provide shade for the eyes.

Quick Check

Show images of different scenarios: a child playing in the sun at noon, a person reading under a tree, someone wearing sunglasses. Ask students to hold up a green card if the scenario is safe and a red card if it carries a risk of sun damage, explaining their choice.

Frequently Asked Questions

How can Year 3 students learn about UV radiation risks?

Introduce UV as invisible rays from the sun that damage skin cells and eyes. Use UV beads or detector cards for hands-on detection, linking to light straight-line travel. Discuss daily examples like sunburn after cloudy days to connect science with life, building risk awareness through observation and evidence.

What are effective sun protection strategies for children?

Teach SLIP (loose clothing), SLOP (sunscreen SPF30+ reapplied every 2 hours), SLAP (hat), SEEK (shade 10am-4pm), and sunglasses. Relate to curriculum via shadow length for shade timing. Activities like role-plays reinforce habits, ensuring students apply strategies practically.

How does sun safety fit into the Light and Shadows unit?

Sunlight's intensity demonstrates light properties while shadows offer protection. Students measure shadow changes to understand sun position, analysing risks of direct exposure. This integrates observation skills with health, aligning with KS2 standards on light sources and effects.

How can active learning help students understand sun safety?

Active approaches like UV experiments and poster creation make abstract UV dangers concrete and memorable. Role-plays build decision-making skills, while group presentations promote peer education. These methods shift passive listening to engagement, fostering lifelong habits through reflection and application in real contexts.