Page 49 - @ccess 3 Student´s Book

Continue Activity 4 below
• Find the section to which each post-it refers in the text. Draw an manhandle
(v.): maltratar
arrow to link them. Look at the example.
• Discuss: ¿Do you think this was the best way to arrange the set
of instructions? ¿Why?

Static-powered figures
Example:
This shows in an These are images
orderly and detailed MATERIALS that expand the
manner how to do * Tissue paper information in
the experiment. * One balloon each step of the
* Scissors instructions or
* Hair (preferably your own or other person’s, you may show the materials
use animal hair, provided you don’t manhandle the animal) needed.

PROCEDURE
This gives additional 1. Draw a figure on the tissue. If it’s
information about a 2-ply tissue, you should separate
what the them carefully, so you don’t tear them. These are graphic
experiment proves. marks used to
2. Cut the figure and place it on an distinguish the steps
even surface. in the instructions
and to present the
materials.
3. Inflate the balloon
and tie it off.

This lists the things
needed for doing
the experiment. 4. Rub the hair quickly on the balloon This is a catchy
for at least 10 seconds (be careful, expression that
because it may burst). draws the reader’s
attention and
5. S lowly move the balloon close to summarizes the
information of the
the tissue figure. If the balloon has experiment.
been charged with enough static
electricity, the figure will float
towards it. With some practice, you
may even make the figure dance.

Tip: Well-charged, the balloon can move the tissue
figure from several centimeters away. These are short

Why does the figure float towards the balloon? expressions
that divide the
When you rub the hair against the balloon, negatively-charged experiment into
electrons gather on the balloon’s outer surface. These electrons sections.
have enough electrical charge to attract light, positively-charged
objects, such as figure made of tissue.

Source: https://goo.gl/MPndCv

48 Studentʼs Book / Practice 3