1. a) The girl is rubbing the balloon on her hair, which transfers electrons from her hair to the balloon, giving the balloon a negative charge and her hair a positive charge. This causes the strands of hair to repel each other and stand up.
b) The charged balloon attracts the neutral wall because it induces a temporary opposite charge on the surface of the wall closest to it (electrostatic induction).
c) The balloon sticks to the wall due to the attractive electrostatic force between the negatively charged balloon and the induced positive charge on the wall’s surface.
2. a) Fossil fuels — non-renewable
b) Burning coal — non-renewable
c) Wind — renewable
d) Light gained from the sun — renewable
e) Biodegradable biomass — renewable
f) Nuclear reactors — non-renewable
g) Oil — non-renewable
h) Using solar panels — renewable
Parent Tip: Review the logic above to help your child master the concept of electrical energy worksheet.
