Aim: What are the characteristics of living things? - PowerPoint PPT Presentation

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Aim: What are the characteristics of living things?

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Aim: What are the characteristics of living things? Topic: Conditions for life What is BIOLOGY? the study of life. What is an ORGANISM? - any living thing. – PowerPoint PPT presentation

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Title: Aim: What are the characteristics of living things?


1
  • Aim What are the characteristics of
    living things?
  • Topic Conditions for life

2
What is BIOLOGY?
  • the study of life.
  • What is an ORGANISM?
  • - any living thing.

3
  • What is an Environment?
  • the surroundings of an organism which affects how
    it lives.

4
  • What do all organisms need to survive?
  • CONDITIONS/FACTORS FOR LIFE
  • 1. SOURCE OF ENERGY
  • - needed for life processes.
  • - light, FOOD
  • The SUN is the origin of almost all the energy
    available to all living things.

5
  • WATER
  • water makes up more than 65 of all organisms.
  • it dissolves carries materials throughout an
    org.
  • many chemical reactions take place in water.
  • helps keep an organisms temperature stable.

6
  • GASES
  • found in the environment.
  • needed to perform life processes.
  • oxygen (O2), carbon dioxide (CO2)
  • nitrogen (N).
  • PROPER TEMPERATURE
  • - needed to maintain homeostasis or dynamic
    equilibrium which means to have a constant,
    stable internal environment.

7
  • PROPER HABITAT
  • a place to live and find all the other factors
    needed for to carry out the life processes.

8
  • What are the life processes?
  • processes that all living things must do in order
    to survive. THEY ARE
  • METABOLISM
  • RESPONSE
  • GROWTH
  • MOVEMENT
  • REPRODUCTION

9
  • What is METABOLISM??
  • 1. Metabolism total of all the chemical
    activities that occur in a living thing involving
    energy usage.
  • e.g. Building substances.
  • Breaking down substances.
  • - in order for these chemical reactions to take
    place, organisms must take in food for energy.

10
  • What is RESPONSE??
  • -a reaction to a stimulus.
  • What is a stimulus?
  • -any change in the internal or external
    environment of an organism (temperature, weather,
    light, predator).
  • e.g. blink, leaves fall off a tree, leaves bend
    towards light

11
What is Homeostasis?
  • Homeostasis is the bodys ability to maintain a
    constant internal environment.
  • Examples include
  • Maintenance of body temperature.
  • Maintenance of pH.
  • Maintenance of sugar level in the blood.
  • Maintenance of water level in the body.
  • Failure to maintain homeostasis will result in
    the organism becoming sick or dying!

12
  • What is GROWTH?
  • - building new parts for an organism during
    metabolism.
  • - an increase in cell size.
  • - replace or repair of dying or dead cells.
  • - maturation
  • e.g. a baby getting bigger, fruit ripening

13
  • What is MOVEMENT?
  • a change in position.
  • a whole organism can move.
  • internal organs, fluid, blood can move.
  • cell parts and cells can move.

14
  • What is REPRODUCTION?
  • - production of a new offspring or organism.
  • 2 types 1) sexual 2 parents
  • 2) asexual 1 parent
  • NOT needed for the individual organism to
    survive just the species.

15
Summary
  • All forms of life share certain
    characteristics. Living things are able to move,
    perform complex chemical activities, grow,
    reproduce, and respond to stimuli.
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