Animal life cycles

Chapter 1
Life cycles

1-Animals that have no backbons are invertebrates.

2-Most invertebrates are very small.

3-The biggest group of invertebrates is the arthropods.

4-95% of the animal species in the world are invertebrates.

5-Animals that have a backbone are vertebrates.

Complete the chart

Invertebrates

-          Arthropods  - Spider

-          Mollusks - Snail

-          Sponges – Sponge

-          Cnidarians – Jellyfish

-          Echinoderms – Starfish

-          Flatworms – Ocean flatworm

-          Roundworm – Threadworm

-          Annelids – Earthworm

Vertebrates

-          Fish – Tuna fish

-          Amphibians – Frog

-          Reptiles – Snake

-          Birds – hummingbird

-          Mammals – Lion

Match

     

        1-  Animals that eat plants and animals omnivores.

        2-  When sperm joins with an egg fertilization.

        3-  Animals that have a backbone vertebrates.

        4-  Animals that produce sperm males.

        5-  Animals that eat plants herbivores.

        6-  An important group of invertebrates arthropods.

        7-  An important group of vertebrates reptiles.

        8-  Animals that eat other animals carnivores.

        9-  Animals that produce eggs female.

      10-  Animals that have no backbone invertebrates.

Answer the questions

    1-      How do scientists put animals into groups?

    When animals are the same in many ways.

    2-     Why  are people dangerous for animals?

    Because People hunt birds and other animals.

    People also cut down trees and build houses and roads on land.

    3-     How long can a Galapagos tortoise live for?

    A Galapagos tortoise can live for 150 year.

    4-     How long does a mayfly usually live for?

    An adult mayfty usually lives for just a few hours.

    5-     Do birds and reptiles give birth to baby animals?

    No, reptiles and birds lay eggs.

    6-     How do mammals care for their babies?

    mammals care for their babies and feed

    them milk. Some big mammals stay with their

    babies for many years.

Chapter 4 

Fish

Complete the chart

Fish

Live in: water

Cold- blooded

Young fish

Dangers:  Most of them don’t have fins, so they can’t swim well.

They often float into colder water or places where there's no food.

Also, many predators, like seals, birds, frogs, and other fish, hunt them.

Food: eat small plants and insect eggs or larvae.

Complete the sentences

1-      A male Seahorse carries eggs in a special pouch on his front

2-      Some species of  Shark lay their eggs in a hard egg case.

3-      A tuna fish can lay up to six million eggs at one time.

4-      A whale shark only grow into an adult when it’s 25 years old.

5-      When a stickleback is looking for a mate, he builds a nest and he changes to a red color.

6-      To breed, a salmon swims back to the rivers where it hatched.

Write true or false.

   1-      Most baby fish hatch from eggs    True                                                          

   2-      Most fish only lay one egg.   False                                       

   3-      Inside every egg there’s a bag of food called the yolk.  True

   4-      When young fish hatch, the yolk bag is still struck to their body.   True

   5-      When young fish hatch, they already have fins.  False

   6-      Most fish stay with their eggs until they hatch.  False

Complete the sentences

   1-      Sockeye salmon hatch form eggs. 

   2-      The they swim to the ocean.

   3-      They swim back to the rivers where they hatched to breed.

   4-      After breeding, they die.

    2 1 4 3

Chapter 6

Reptiles

Find and write the words

   1-      Turtle

   2-      Lizard

   3-      Snake

   4-      Crocodile

Match then write the sentences

   1-      If a predator catches a lizard the lizard can break off its tail.

   2-      Monitor lizards fight for a mate.

   3-      To find a mate crocodiles blow bubbles in the water.

   4-      When a snake grows its old skin comes off.

   5-      Alligators make a nest from mud and leaves.

Circle the correct words

   1-      Reptiles are cold-blooded.

   2-      Their skin is covered with scales.

   3-      The stinkpot turtle makes a horrible smell from its legs.

   4-      Some whiptail lizards can produce young without mating.

Write true or false

   1-     The female Nile crocodile carries her babies  

   to water  inside her mouth.   True

   2-     Sloughing is when snakes lose their old skin.   True

   3-     Pythons lay their eggs and then they leave them.    False

   4-     Alligators  don’t eat for weeks when they are

   keeping  their eggs safe.   True                       

Order the words 

       

   1-     Reptiles / from / most / eggs / hatch

   Most reptiles hatch from eggs.

   2-     Change / Chameleons / color / can

   Chameleons can change color.

   3-     Lay / eggs / nest / big / their / in / alligators / a

   Alligators lay their eggs in a big nest.

   4-    Their / smell / snakes / mate / find / by

   Snakes find their mates by smell.