This document discusses using a spring scale to measure the weights of common classroom objects. Students will work in groups to predict the weights of 8 objects, test their predictions using a spring scale, and record their results. They will learn that predicting involves making educated guesses based on prior knowledge, and that recording results is important for scientists to learn and make discoveries. The goal is for students to practice making and testing predictions.

2.  We use __________ to measure
weight.
kitchens scales flourscales

3.  Weight means __________ we are.
tall friendly heavyheavy

4.  _________means to find the size or
number of something.
scales measure balancemeasure

5.  We use this to hold the scale in
the air:
holder scale hookholder

6.  This stretches when we put an
object on the hook.
holder spring hookspring

7.  Today we are going to learn about:
› Making Predictions
› How to use a spring scale
› Testing predictions
› Recording Results
› The weights of some common classroom
objects.

11.  Let’s predict how much it weighs.
 Predict means to guess.
 When we predict we don’t make wild
guesses.

12. I predict the
eraser weighs 25
kg!
Haha 

13.  When we predict, we work with what we
already know.

14. = 15 Grams
An eraser is
smaller than a
mouse so I
predict……..

15.  I will write your name and prediction on
the board.
 We should say:
 I predict that the eraser
weighs………..

16.  We test our predictions by using the
spring scale.
 Watch me when I use the spring scale.
 You will be doing this with your friends in
a moment.

17.  Scientists always record
their predictions and results.
 Record means writing
something down and keeping
it for later.
 This is how they learn
and make new discoveries.

18. Object Prediction Result Difference
Eraser 10 grams

19.  Let’s get into groups of 6 people.
 Choose 8 classroom objects.

21.  Let’s get into groups of 6 people.
 Choose 8 classroom objects.
 Each person should predict the weight of
each object and write it on their paper.
 Next you should take turns using the
spring scale to test your result.
 Finally, record your results on your
experiment paper.