Variety of Life - Clounagh Science's Blog

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Variety of Life
Is It Alive?
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How do you know if something if alive or not?
There are seven life processes (MRS
GREN):
Movement
Respiration
Sensitivity
Growth
Reproduction
Excretion
Nutrition
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
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Organism means living thing
There are two big groups:
Plants
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
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Animals can be divided into:
vertebrates (have a backbone)
invertebrates (no backbone)
Which group do we belong to?
Vertebrates
Which group do worms belong to?
Invertebrates
Vertebrates
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There are five groups (BFARM):
Birds
Fish
Amphibians
Reptiles
Mammals
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
Amphibians
• The poison
dart frog is
lethal to
humans
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:
Thorax
Head
The
Damselfly
Abdomen
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
Keys
•This is a question key
•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

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