BUILDScience
Lesson overviewBUILD · Week 3

Backbones and no backbones

One body clue. Two animal groups.

I can use evidence to decide whether an animal has a backbone.

Simplified fish diagram showing a row of internal backbone bones.Open image full size
Backbones and no backbonesSlide 1 of 11
You Do · practiseBUILD · Week 3

Start with your own idea

Name or point to an animal.

Do you think it has a backbone?

Keep your first idea. We will check evidence.

Backbones and no backbonesSlide 2 of 11
I Do · learn and modelBUILD · Week 3

Three things we will do

Find a backbone in a model.

Sort animals using body evidence.

Explain one decision using because.

Backbones and no backbonesSlide 3 of 11
I Do · learn and modelBUILD · Week 3

Look for bones inside

A column of small rectangular bones models a backbone; an adjacent fish diagram places a backbone inside its body.
Original teaching-pack diagram and labels.
Open image full size
Read the slide text
A column of small rectangular bones models a backbone; an adjacent fish diagram places a backbone inside its body. simplified backbone small bones A backbone is a connected series of small bones down the back. An animal with a backbone is a vertebrate.
Backbones and no backbonesSlide 4 of 11
I Do · learn and modelBUILD · Week 3

A hard outside is different

FISHCRAB
Bones inside the body. A backbone inside. Vertebrate.Hard case outside the body. No backbone. Invertebrate.
Simplified fish diagram showing a row of internal backbone bones.Open image full size
Simplified crab with a hard outer body case; no internal backbone is shown.Open image full size
Backbones and no backbonesSlide 5 of 11
We Do · think togetherBUILD · Week 3

Decide before the explanation

Fish: bones inside include a backbone.

Snail: a shell, but no backbone.

Frog: bones inside include a backbone.

Choose: vertebrate or invertebrate.

Simplified snail with a shell on the outside of its body.Open image full size
Backbones and no backbonesSlide 6 of 11
We Do · think togetherBUILD · Week 3

Try the rule again

Mouse: an internal backbone.

Crab: a hard outside; no backbone.

Earthworm: fluid support; no backbone.

Which body clue decides each group?

Simplified earthworm with a soft, elongated body.Open image full size
Backbones and no backbonesSlide 7 of 11
We Do · think togetherBUILD · Week 3

Different outsides, same test

THE ANIMALSTHE BODY EVIDENCE
Fish and frog Bird and lizard Very different outsides.All have an internal backbone. All are vertebrates. Fur and legs are not the test.
Backbones and no backbonesSlide 8 of 11
I Do · learn and modelBUILD · Week 3

Use because to show your reason

The robin is a vertebrate because its body has an internal backbone.

Name the animal. Name the group. Give the body evidence.

Simplified bird diagram showing an internal backbone and ribs.Open image full size
Backbones and no backbonesSlide 9 of 11
We Do · think togetherBUILD · Week 3

Sort the evidence cards

ANIMAL CARDSIS THIS A RELIABLE TEST?
Bat Crab Snake JellyfishIt has a backbone inside. It is furry. It is small.
Backbones and no backbonesSlide 10 of 11
We Do · think togetherBUILD · Week 3

Check one choice and keep it

Choose one animal card.

Point to or say the body evidence.

Keep or change your first choice.

Label and save your work for Wednesday.

Backbones and no backbonesSlide 11 of 11

Use the controls or left and right arrow keys. Printing includes pupil content; model answers remain separate.