Single-Celled Organisms Single-Celled organisms are simple life-forms They move, find food, grow, and reproduce © LoveLearning 2014

One-Celled Organisms Amoebas – a kind of animal One-celled organism with a nucleus Live everywhere Pond water, saltwater, animals, and humans! Six kinds of amoebas are found in the human body Amoebas have a cell membrane, cytoplasm, and a nucleus They move by changing their shape © LoveLearning 2014

One-Celled Organisms Algae – plant-like organisms Live in water, moist places, under rocks Among the oldest things on earth Algae have a cell membrane, cytoplasm, nucleus, and chloroplasts Algae produce most of the oxygen you breathe! More oxygen then all other plants combined © LoveLearning 2014

One-celled organisms Bacteria – one celled organisms with no nucleus The material that is usually in a nucleus can be found all over the cytoplasm instead More bacteria on earth than any other kind of living thing Some bacteria is helpful, and some is harmful One handful of soil can contain billions of bacteria. © LoveLearning 2014

How do single-celled organisms move? Tail-like parts called flagella Hairlike structures called cilia Paramecium also use their cilia to get food © LoveLearning 2014

Single-Celled Organisms http://safeshare.tv/w/cKrzGXcZkP © LoveLearning 2014

A living thing that is too small to see without a microscope Microorganism A living thing that is too small to see without a microscope

Microorganisms Microorganisms live everywhere on Earth Soil, air, water, humans Bacteria make up the largest group of microorganisms Other microorganisms: Fungi, algae, protozoa (amoebas and paramecium) © LoveLearning 2014

Harmful Microorganisms Some harmful bacteria such as Salmonella and E. coli can make you sick Found in raw chicken and meat, raw eggs, and other foods If these foods touch other foods, the bacteria can spread Cooking food kills this bacteria, but the bacteria will begin to grow again if the food is left out of the refrigerator for more than two hours Strep throat is caused by harmful bacteria http://www.brainpop.com/science/diversityoflife/bacteria/

Harmful Microorganisms A virus is another microorganism that causes diseases Smaller than bacteria Viruses cause colds and diseases, and they change as they reproduce Medicine that kills one virus cannot kill another virus © LoveLearning 2014

Harmful Microorganisms Fungus is another type of microorganism Mold, yeast, mushrooms Harmful mold and fungi can spread through crops and kill them Also rot food and wood Causes different types of skin diseases (athlete’s foot and ringworm) © LoveLearning 2014

Helpful Microorganisms We could not live without microorganisms! Algae and plankton (microscopic plants and animals) float on the surface of the ocean They feed tiny fish, bigger fish eat the tiny fish, etc. © LoveLearning 2014

Helpful Microorganisms 1. Help provide us with other kinds of food Bacteria turns milk into yogurt 1 gram of yogurt can contain 1 billion bacteria! Bacteria produces cheese Yeast makes bread, rolls, and cakes rise © LoveLearning 2014

Helpful Microorganisms 2. Microorganisms help us digest our food © LoveLearning 2014

Helpful Microorganisms 3. Microorganisms produce medicine Penicillin is made from mold © LoveLearning 2014

Helpful Microorganisms 4. Make dead things decay Earth would otherwise be covered with a thick layer of dead plants and animals © LoveLearning 2014

Living with Microorganisms Wash hands often and cook food carefully Antibiotics cure diseases caused by bacteria Cannot cure diseases caused by fungi or viruses Can kill both good and bad bacteria Eating yogurt puts back good bacteria in your body http://peer.tamu.edu/curriculum_modules/Properties/module_1/Activity_bacteria.htm © LoveLearning 2014

Protect! Don’t Infect! http://safeshare.tv/w/bBRlgcprwH © LoveLearning 2014

Check out my other products at: Terms of Use Thank you for downloading this product! The purchase of this product entitles you to single classroom use. Please be respectful of my work and do not share with your entire grade level or post this anywhere online (including your personal website). If you wish to share this with colleagues, please purchase multiple user licenses. If you have any questions or need clarification, please contact me at lovelearningTPT@yahoo.com Check out my other products at: http://www.teacherspayteachers.com/store/lovelearning

Graphics From: www.teacherspayteachers.com/store/Lindy-Du-Plessis www.mycutegraphics.com