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Longer, heavier, more

Compare length fairly and choose appropriate tests for length, weight and capacity.

Paper packet. Every task here also exists on screen, where it is checked automatically; answers written on paper are not assessed by Nydus. When you are back at a device, enter your answers there.

1. What you will learn

Today we compare length from aligned ends and distinguish length from other measurable properties.

2. Length words

TermWhat it means
AlignPut matching starting ends together.
Equal lengthThe same distance from end to end.

3. Start together

Length tells how far something reaches from one end to the other. To compare two straight ribbons, put their starting ends together. Smooth them without stretching. Look at their other ends. The one reaching farther is longer; the one stopping sooner is shorter. If both ends match, their lengths are equal. Moving a ribbon across the table does not make it longer.

Another way: picture

Three ribbons start at one vertical line: top red spans three equal blocks, middle blue four, bottom green two.
Three ribbons start at one vertical line: top red spans three equal blocks, middle blue four, bottom green two.

Check the starting line before the far ends.

4. Choose the right test

Length, weight and capacity ask different questions. Align ends for length. Use a fair balance for weight. Pour carefully to compare capacity. A longer container need not be heavier or hold more. Equal small blocks can help record length: place them end to end without gaps or overlaps, always using the same block size.

5. Ribbon maker

Choose a ribbon for a toy doorway. Compare it directly with the opening. Explain whether it is too short, long enough, or needs trimming.

6. Red and green

  1. Ribbons
    Ribbons

    Check both starting ends.

    Same line.

    This makes a fair comparison.

  2. Compare their far ends.

    Red is longer.

    It reaches one block beyond green.

7. Blue and red

  1. Ribbons
    Ribbons

    Count equal blocks.

    Blue four; red three.

    Every block has the same length.

  2. Your turn: work this step out. Its working is at the end of the packet.

    Name the longer ribbon.

8. Guided practice

All bars begin at the same left edge. Match each pair to its longer bar.

BlueYellow
![Red](img_pkb_bar_red_short@1) ![Blue](img_pkb_bar_blue_long@1)
![Green](img_pkb_bar_green_medium@1) ![Yellow](img_pkb_bar_yellow_long@1)

Audio transcript: None

9. Guided practice

For each pair with matching starting ends, name the shorter bar.

YellowBlue
![Yellow](img_pkb_bar_yellow_short@1) ![Red](img_pkb_bar_red_medium@1)
![Blue](img_pkb_bar_blue_medium@1) ![Green](img_pkb_bar_green_long@1)

Audio transcript: None

10. Guided practice

Two ribbon sets were aligned and measured with the same small block. Match each set to its longest ribbon.

RedGreen
A: red 4 blocks, blue 2, green 3
B: red 1 block, blue 3, green 5

Audio transcript: None

11. Practice

![Aligned ribbons](img_pkb_aligned_ribbons@1) Which ribbon is longer than the red ribbon?

Audio transcript: None

12. Somewhere new

![Craft ribbons](img_pkb_aligned_ribbons@1) A toy craft needs the blue ribbon shortened to the red ribbon's length. How many equal block-lengths must be removed?

Answer:

Audio transcript: None

13. Somewhere new

Two ribbons start at different places. One ends farther right. What should you do before deciding which is longer?

Audio transcript: None

14. Lesson test

Lesson test: one question per skill, one attempt each, no hints. Your answers are checked when you submit.

15. Test question

![Ribbons](img_pkb_aligned_ribbons@1) How many equal block-lengths must be added to green to make it as long as blue?

Answer: block-lengths

Audio transcript: None

16. What you can do now

Show how to line up two objects fairly before deciding which one is longer.

Working for the steps left to you

7. Blue and red, step 2

Blue.

Four equal lengths exceed three.