Y3 Spring Block 3 TS7 Investigate - shadow experiment

1.

2.

3.

1) Which object would we use to measure distance?
2) True or false?
Humans can see in complete darkness.
false – humans need light to see
absorb water.
3) Soils can prevent flooding as they ______
4) Describe the properties of chalk.
hard with crystals
hard with layers
soft white rock

4.

5.

Complete the sentences.
light sources
light
objects that give out _____
opaque
does not
an object or material that ________
allow any light to pass through it
shadow
a dark area caused by an object
_______
blocking a source of light
distance
two points are away from
how far ____
each other

6.

7.

How does the distance
between the light source
and the object affect the
size of a shadow?

8.

How will we use each piece of equipment in our investigation?
opaque objects
to make a shadow
measuring tapes
to measure the width
of the shadow
paper
as a background for
the shadow
light sources
to shine on the
opaque objects

9.

What will we change?
light source
opaque
object
paper
the distance between the light source and the object

10.

What will we measure?
light source
opaque
object
the width of the shadow
paper

11.

What will we keep the same?
light source
opaque
object
the light source
the opaque object
the distance from the object to the paper
paper

12.

I will change the opaque
object each time.
Why is it important to keep the same object each time?
We can only change one thing in a fair test.

13.

Order the method
Cut out each step of the method and put them into order.
The first one has been done for you.

14.

Record data
What mistake
Jack
has
completes
he made the
when
experiment.
recording his results?
He has put cm in the table.
20 cm
Distance between torch
and object (cm)
Width of the shadow at its
widest point (cm)
20
11cm

15.

Jack completes the experiment.
40 cm
Distance between torch
and object (cm)
Width of the shadow at its
widest point (cm)
20
11
40
9

16.

Jack completes the experiment.
60 cm
Distance between torch
and object (cm)
Width of the shadow at its
widest point (cm)
20
11
40
9
60
7

17.

What do you notice about Jack’s results?
Distance between torch
and object (cm)
Width of the shadow at its
widest point (cm)
20
11
40
9
60
7
As the distance between the light source and the object
increases, the width of the shadow decreases.

18.

Ron completed the same experiment.
Distance between torch
and object (cm)
Width of the shadow at its
widest point (cm)
20
11
40
12
60
8
What do you notice about Ron’s results?
The width of Ron’s shadows did not decrease as
the light source was moved further away.

19.

20.

Rearrange the cards into the table to
create a new investigation.

21.

22.

The characters
Annie
Amir
Alex
Whitney
Tommy
Teddy
Dexter
Rosie
Sam
Max
Mo
Jo
Kim
Ron
Jack
Eva
Tiny
Diddy