Activity Image
Conservation

Light the way

Let’s flip the switch and have a closer look at light options.

  • Grade 5
  • Slideshow
  • 20 mins
  • New

Overview

Through an interactive slideshow, explore natural and artificial light and the choices we can make to power down, conserve energy and stay healthy.

What you'll need

  • “Light the way” slideshow
  • Digital projector and screen

Instructions

  1. Do the activity “Build a light maze” and discuss with the students what plants need to flourish and grow like water, food and light.  
  2. Pull up the “Light the way” slideshow to learn the difference between natural and artificial light. 
  3. Pause the slideshow at slide 3 and ask the students in pairs or threes to list natural light sources. We’ve thought of ten; can you beat that?
  4. Slide 5 to 6 list some benefits of natural light.
  5. Slides 7 to 11 ask the students to guess what the lights are and which is the best choice to reduce electricity use. 
  6. In slides 12-16 learn about natural and artificial light for growing food.
  7. The slideshow concludes with how we generate electricity in BC, and simple ways to use natural light in our homes, and reduce electrical consumption. 

Additional Information

  • Assess the students’ ability to understand natural versus artificial light. 
  • Assess the students’ knowledge of artificial light types and electricity consumption. 
  • Assess the students’ understanding of different ways to grow food.

Extensions

  • Ask the student to do a light audit at home and count how many incandescent, CFL and LED lightbulbs they can find. Discuss changing to LED bulbs when the old bulbs need replacing.

Plants move

Their roots grow down (or laterally) and the aerial parts grow towards natural or artificial light. The process of photosynthesis uses light energy to turn carbon dioxide and water into sugars, which the plant uses. Essentially, the plant needs to find light to get food. 

Natural versus artificial light

Although plants will grow under artificial light, studies have shown that they prefer natural light which has a perfect balance of wavelengths necessary for plant growth. Use of artificial light (greenhouses and in underground spaces) is a growing industry. Benefits include the ability to grow local food throughout the year, however, there are impacts on energy, and light pollution. 

Natural light can benefit our health and save energy. Natural light:

  1. Helps improve mental health
  2. Improves sleep
  3. Increases ability to concentrate and learn
  4. Helps our bodies to produce vitamin D which help us build and maintain teeth and bones and absorb calcium
  5. Saves energy as we can turn off the artificial lighting

Tips to increase natural light and conserve energy

  • Keep blinds or curtains open to let in the natural light
  • Decorate with bright reflective colours and/or use mirrors
  • Get outside and exercise

LED lighting 

LED lightbulbs have a long lifetime and use 75% less energy than incandescent lightbulbs. There is also a range of colours available for LED bulbs, ranging from a soft yellow to a bright daylight, which can provide an alternate to natural light. Go here for information on LED lighting.

Grade 5 Socials - Content 

  • Natural resources continue to shape the economy and identity of different regions of Canada

Grade 5 Socials – Curriculum Competencies

  • Ask questions; gather, interpret, and analyze ideas; and communicate findings and decisions


Grade 5 Science – Content

  • Nature of sustainable practices around BC’s resources

Grade 5 Science – Curriculum Competencies

Question and predict
  • Demonstrate a sustained curiosity about a scientific topic or problem of personal interest and make predictions about the findings of their inquiry
Process and analyze 
  • Experience and interpret the local environment

This activity is part of the lesson

Light for life

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Lesson Light for life support image

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