We use __________ to measure weight.

kitchens scales flour scales

Weight means __________ we are.

tall friendly heavy heavy

_________means to find the size or number of something.

scales measure balance measure

We use this to hold the scale in the air:

holder scale hook holder

This stretches when we put an object on the hook.

holder spring hook spring

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.

Let’s predict how much it weighs.

Predict means to guess.

When we predict we don’t make wild guesses.

I predict the eraser weighs 25

kg! Haha

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

= 15 Grams

An eraser is smaller than a

mouse so I predict……..

I will write your name and prediction on the board.

We should say:

I predict that the eraser weighs………..

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.

Scientists always recordtheir predictions and results.

Record means writing something down and keeping it for later.

This is how they learn and make new discoveries.

Object Prediction Result Difference

Eraser 10 grams

Let’s get into groups of 6 people.

Choose 8 classroom objects.

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.