Variety of Life

Is It Alive?

• • How do you know if something if alive or not?

There are

seven life processes (MRS GREN)

:

1. M

ovement

2. R

espiration

3. S

ensitivity

4. G

rowth

5. R

eproduction

6. E

xcretion

7. N

utrition

MRS GREN •

Movement

- we need to move around to get food, plants can move their leaves towards sunlight •

Respiration

- both plants and animals take in Oxygen from the air to release energy •

Sensitivity-

we are all sensitive to the cold, acidity etc.

MRS GREN • •

Growth

- We all grow up (and out!) •

Reproduction

- All living things make more of themselves •

Excretion

- Getting rid of waste e.g. we breathe out Carbon Dioxide

Nutrition

- Eating (plants take in nutrients from the ground)

Organisms • • Organism means There are two

1. Plants living thing big groups:

•

2. Animals

There are also

bacteria and viruses

that make us sick

Classification • Carl

Linnaeus,

a Swedish scientist came up with the classification system • Organisms are placed in groups if they are similar to each other

Animals • 1.

Animals can be divided into:

vertebrates

(have a backbone) • • • •

2. invertebrates

(no backbone) Which group do we belong to?

Vertebrates Which group do worms belong to?

Invertebrates

Vertebrates • There are five groups (BFARM):

1. B

irds

2. F

ish

3. A

mphibians

4. R

eptiles

5. M

ammals

Weird Mammals •

Dolphins

- they have lungs

A Bottlenose Dolphin

Weird Mammals •

Whales

- have lungs

Killer Whales

Weird Mammals • The

Blue Whale-

the largest animal

Weird Mammals •

Bats

- they are related to rodents

Reptiles • The

Tortoise

live on land

Reptiles •

Turtles

live in water The Green Sea Turtle

Birds •

Emperor Penguins

are one of the few organisms to live in Antarctica

Amphibians • The

Fire salamander

can re-grow legs that have been cut off

• The

poison dart frog

is lethal to humans Amphibians

• Fish

Sharks

are fish, they have gills

The Great White Shark

Annelids • These are

Earthworms and leeches

• They are

invertebrates

• They have rounded bodies • Their

body is segmented

Arthropods • This big group (

phylum

) of ancient invertebrates include smaller groups (

classes

) of insects, spiders, millipedes and crabs • They have a

hard body

• It is divided into

segments

• They have

jointed legs

Arachnids • • They have

8 legs Two body parts and no wings

Insects • They have

6 legs

and two pairs of

wings

• They have

3 body parts

:

Head Thorax Abdomen The Damselfly

Insects (Stag Beetle)

Head Thorax Abdomen

Molluscs • These are slugs, snails, squid and the octupus • They have soft bodies with a head and a muscular foot

Plants • These are divided into:

1. Flowering plants

(conifers and seed producing flowers)

2. Non-flowering plants

(Algae, ferns and mosses)

Non-Flowering Plants Algal bloom on a river

Flowering Plants This Passion Flower makes seeds

•This is a question key Keys •It can be used to separate organisms according to their characteristics •Can you name the invertebrate A, B, C and D

A= Ant B= Mite C= Spider D= Mayfly

Diagram Keys