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1. All about animals
1. Classify these animals into vertebrate or invertebrate animals in the table
below.
2. Complete these sentences.
● are animals that don’t have a backbone.
● are animals with a backbone.
3. Which body feature of a mammal produces milk? Circle.
A. Mammary glands.
B. Lips.
C. Limbs.
Vertebrates Invertebrates

2. 3 - Natural Science
4. Write True (T) or False (F).
● Herbivores only eat animals.
● Omnivores eat animals and plants.
● Carnivores only eat animals.
5. Circle the characteristic a birds does not have.
A.
B.
C.
6. Complete the sentences with the words in the box.
● All reptiles breathe through .
● Reptiles have dry, scaly .
● Some reptiles have a hard on their back, such as the turtle.
● Most reptiles have four short . But, some reptiles, like snakes,
do not.
limbs, lungs, shell, skin

3. 3 - Natural Science
7. Label the picture with the most important features of a fish.
8. Match the characteristics of fish to the definitions.
Gills ●
Fins ●
Scales ●
● Fish use them to move
through the water.
● Fish breathe through them.
● They cover the fish’s body.
9. Write True (T) or False (F).
● Amphibians have a long and moist tongue.
● All amphibians are oviparous.
● Adult amphibians have lungs for breathing, but young amphibians
breathe through gills.
10. Which of these sentences is incorrect? Circle.
A. Sponges cannot move around because they are fixed to the sea floor.
B. All molluscs have a muscular body and two shells.
C. Worms live in the ground or in water.

4. 3 - Natural Science
11. These pictures show the life cycle of a frog. Label the three life stages.
12. Using your own words, explain the metamorphosis of a frog.
13. Label the parts of a fly.
head, thorax, abdomen, antennae, wings, legs

5. 3 - Natural Science
14. Match the arthropods to their characteristics.
Crustaceans ●
Insects ●
Arachnids ●
● Their body is divided into three
parts: head, thorax and
abdomen. They have six legs.
● Their body is divided into two
parts: cephalothorax and
abdomen. They have eight legs.
● Their body is divided into two
parts: cephalothorax and
abdomen. They have ten legs.
15. Choose an invertebrate that lives in the ocean (sponge, jellyfish,
echinoderm, worm or mollusc). Write a description of the animal.