Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids

3 Energy and movement
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KEY QUESTIONS
• How can stored energy be changed into movement energy?
• How can we make things move using stored energy?
Teacher's Note
This chapter is an introduction to stored (potential) energy and
movement (kinetic energy). Although the proper terms are not
used here, you could introduce them in class so that learners start
to become familiar with these words for the later grades.
Do you remember in Grade 4 when we looked at energy and
movement in asystem? We were mostly looking at musical
instruments and how they use movement energy (the input) such
as plucking or blowing, to make them work.
In this chapter we are going to look at some other ways of using
stored energy to produce movement energy.
3.1 Elastics and springs
Stretching an elastic band.