Natural Science - 4º primaria

NATURAL SCIENCE – UNIT 4

1. Look and tick the correct group of animals.

MAMMAL

FISH

BIRD

REPTILE

AMPHIBIAN

Giraffe Frog Shark Snake Eagle Dolphin Parrot Crocodile Toad Clownfish Gorilla Bat Salamander

2. Complete the sentences with the words. milk – teeth – beaks – chambers - carnivores – omnivores - rumiants Most reptiles and amphibians eat meat. They are _________________________. Mammals, fish and birds can be herbivores, carnivores or __________________________. Mammals have different types of __________________ and birds have different types of _______________ depending of the food they eat. All baby mammals drink their mother´s _______________________________. Animals such as sheep and cows have a special way of digesting food. They hace four _____________________. These animals are called ______________________________.

3. Write the correct vertebrate group and match the sentence to the photos. a. ____________________ are warm-blooded. They have wings, feathers and beaks. b. _____________________ are cold-blooded. They are born in water, with gills and move to land when they grow lungs and legs. c. _______________________ are warm-blooded and have fur or hair. Their babies drink their mother´s milk until they can find their own food. d. ______________________ are cold-blooded. They live in water and breathe with gills. e. ______________________are cold-blooded and their bodies are covered in scales.

4. Rewrite the sentences with the correct information. a. Herbivores eat meat and carnivores eat plants. _____________________________________________________________________________. b. Cosumers produce their own food. ______________________________________________________________________________. c. Mammals, birds and fish are carnivores. ______________________________________________________________________________.

d. Most amphibians and reptiles are herbivores. ______________________________________________________________________________. e. Birds are viviparous. _______________________________________________________________________________. 5. Identify the animal group by reading the definitons. a. They are viviparous and drink their mother´s milk: __________________________________. b. They have fins and scales and breathe through their gills: _____________________________. c. They are oviparous and they lay their eggs in water. When they are adults, they breathe with their lungs or through their skin: _______________________________. 6. Complete. MAMMALS

FISH

REPTILES

AMPHIBIANS

BIRDS

SKIN

7. Read the sentences and match to correct type of reproduction. a. The embryo develops inside the mother and

OVOVIVIPAROUS

she gives birth to live offspring. b. A few species produce eggs but the eggs develop

OVIPAROUS

and hatch inside the mother. c. The embryo grows outside the mother´s body inside and egg.

VIVIPAROUS

8. Write the parts of these invertebrates.

9. Read and match. Spider

CRUSTACEAN

Ant

MYRIAPOD

Centipede

ARACHNID

Crab

INSECT

__________________________________________ Snail

CEPHALOPOD

Mussel

GASTROPOD

Squid

BIVALVE

__________________________________________ Starfish

ANNELID

Worm

CNIDARIAN

Jellyfish

ECHINODERM

10. Complete writing the words. Arthropods spider – crustacean – arachnid – centipede – beetle – myriapod – crab – insect

Molluscs cephalopod – mussels – gastropod – squid – bivalve – snail

Other invertebrates starfish – cnidarian – jellyfish – annelid – fireworm – echinoderm – sponges

11. Circle the correct words. a. Myriapods/ Arachnids / Gastropods have long, thin, segmented bodies. They live in dark, dump places. b. Insects / Echinoderms / Cephalopods have large heads and tentacles. They live in water. c. Arachnids / Insects / Starfish have three body parts: a head, a thorax and an abdomen. They have two antennae, three pairs of legs and usually have wings.