Monday, April 12th

 HI KIDS! HOW ARE YOU? 😁

WE HOPE YOU'RE DOING WELL 

TODAY WE WILL BE WORKING ON:

SCIENCE 

ORGANISMS

• All living things are called ORGANISMS.

• Organisms do many LIFE PROCESSES:

• Breathe

• Take in energy (food)

• Grow

• Reproduce

• React or sense

• Move

• Make waste

• Non-living things can do some, but NEVER all of these processes.

Ex.: a car can move and make waste but it can`t grow or reproduce.

HOW ARE LIVING THINGS CLASSIFIED (GROUPED)?

• Scientists sort all living things into different groups. Organisms in the same group have some common characteristics.

• Scientists use a classification system to study, compare and identify living things.

• The largest classification group is a KINGDOM. Before there were only 2: animal and plants. Now we have 6 kingdoms:

• ANCIENT BACTERIA: one celled organisms and no nucleus. They can live anywhere: land, water, extreme heat or salty places. They make their own food.

• TRUE BACTERIA: one-celled organisms and no nucleus. They live on land or water. Some can make their food and some cannot.

• PROTISTS: most are one-celled organisms. They have a nucleus. They live in water and moist places. Most cannot make their own food, but some can. Ex: algae, amebas.

• FUNGI: most are multi-celled organisms. Cells have nucleus and other parts. They live on land and cannot make their own food. Ex: mushrooms, yeasts, and mold.

• PLANTS: multi-celled organisms with tissues and organs. Cells have nucleus and cell wall. Most live on land, but some in water. They make their own food using the sun’s energy. Ex: tree, cactus, rose, seaweed, etc.

• ANIMALS: multi-celled organisms with tissues, organs and organ systems. They live in land or water. They cannot make their own food. Ex: worm, human, spider, jellyfish, turtle, etc.

HOW ARE ANIMALS CLASSIFIED?

• Animals are divided in 2 big groups:

• VERTEBRATES: animals WITH  BACKBONE.

• INVERTEBRATES: animals WITHOUT BACKBONE.

• VERTEBRATES: are divided into 5 groups:

	Skin covering	Respiration	Offspring (babies)	Habitat (where they live)	Blood temperature
FISH	scales	gills	lay eggs	water	cold-blooded
AMPHIBIANS	smooth skin	gills (young), lungs (adult)	lay eggs	water or land	cold-blooded
REPTILES	scales	lungs	lay eggs	mostly on land, some in water	cold-blooded
BIRDS	feathers	lungs	lay eggs	mostly on land, some in water	warm-blooded
MAMMALS	hair or fur	lungs	live babies	mostly on land, very few in water	warm-blooded

BODY TEMPERATURE:

• Warm-blooded: animals control their body temperature. Ex: Humans keep their body temperature at around 37°. Mammals and birds.

• Cold-blooded: animals cannot control their body temperature. Their body temperature depends on the outside temperature. Fish, reptiles and amphibians.

• INVERTEBRATES: most of the world’s animals are invertebrates.

Some major invertebrate groups are: 

• ARTHROPODS: their body is divided into sections and they have jointed legs. Their body is covered by a hard outer skin (exoskeleton) to protect it.  Ex.: spiders, crabs, insects, shrimp, etc.

• SPONGES: sea animals with many pores.

• SEA STARS: they have a star-shaped body and live only in the sea.

• WORMS: smooth bodies made of segments. They live in water or land. Ex.: earthworms, leeches, tapeworms.

• MOLLUSKS: they have muscular bodies. Most have a shell for protection. Ex: slugs, snails, octopus, squids.

• JELLYFISH: they have jelly-like bodies and tentacles to catch food. They live only in water.

SEE YOU TOMORROW!