Biology Unit on the Biosphere: biomes, ecosystems, habitats, feeding relationships, biological interactions

What is the difference between a biome, ecosystem, and habitat?  What is the difference between a food chain and a food web? What are trophic levels?  What is the energy pyramid? What is symbiosis?  How do different species interact?  What in the world is amensalism or antiobiosis?!   These are some of the things we covered in our latest biology unit!

Biology Packet - Ecosystems Biomes Food Chains Food Web Trophic Levels Populations

How We Started Our unit on Biomes: This semester we started with an overview of the main biomes. The kids could come up with the names for all of them, though not the more specialized words (like taiga or chaparral.)  In our biology packet, we have several different notebook pages on the main biomes. The kids did the “fill in the blank” version as we highlighted some of the main features of each biome (there’s also one that is completely filled in, one that just has the biome name and students can write in their own information, and a matching page (which my kids did a couple of weeks later):


In the packet, there are full-sized (8 1/2 by 11) photos of each biome.  I chose to print 4 per page which worked well for our needs.  I laminated them and cut them apart.

What are the major biomes?

  • Arctic
  • Alpine Tundra
  • Boreal Forest or Taiga
  • Deciduous Forests
  • Deserts
  • Grasslands
  • Tropical Savannas
  • Chaparral
  • Tropical Rain Forest


As we kicked off our unit, I had the kids choose a biome and they each did research and give a 3 to 5 minute speech on what they learned.  They actually loved that!  LD did deserts; DD did hers on the savanna; and ED did rain forests.

We then did an activity on rain forest plants, which I talked about in this post (and which I also explained in the packet).

climate zones-biomesFrom there, we went on to talk about the three main climate zones (and how that relates to the tilt of the Earth on its axis).  And then we started to talk about the abiotic factors of each biome —  ie. the physical, nonliving factors that shape an ecosystem.

What is an Ecosystem - Abiotic and Biotic Factors

Biotic and Abiotic Factors - World Biomes Worksheets

Biomes-Abiotic-Factors-WorksheetsThe next week, we went on to talk about the dominant animals and plants in each biome.


Biology Packet - Feeding Relationships

We learned the difference between food chains and food webs… and talked about the energy pyramid. The packet includes some interactive notebook activities:

Food Chain Food Web Food Pyramid Activties - Interactive Notebook Pages

Learn about the trophic levels with this interactive notebook/lapbook activity:

Trophic Level - Interactive Notebook Activity

The kids spent one day on the anatomy of a cat and dog. You’ll find those sheets in this packet as well:

Animal-Anatomy-PagesFrom there we discussed the difference between habitats and ecosystems. We talked about the difference between producers and consumers (autotrophs and heterotrophs).  And, we talked about the different feeding relationships: herbivores, carnivores, omnivores, detritivores and decomposers.


Life BBC Documentary

There are some self-correcting review cards for these terms as well:

herbivore carnivore omnivore decomposer detritivor cards

Our unit would definitely not have been as amazing without the breathtaking footage and fascinating stories about the animals of our planet!!  We watched the BBC documentary Life (affiliate link) also narrated by David Attenborough as we studied the different biomes, feeding relationships and biological relationships.  This series was the perfect complement to our studies because it really looked in depth at “some of the more colorful strategies the world’s creatures employ to procreate, evade predators, and obtain nourishment. This enthralling BBC series examines “the lengths living beings go to to stay alive.” We highly, highly recommend this documentary:

We spent time talking about food chains, food webs, and the energy pyramid.

Food Chain Worksheets and Activity


Energy Pyramid Interactive Notebook Activity

In the last part of this unit, we spent quite a bit of time learning about biological interactions:

  • Amensalism
    • Predation
    • Competition
    • Antibiosis
  • Mutualism
  • Commensalism
  • Parasitism

We start with a general discussion of symbiosis and I also introduced the animal defense – mimicry. Then we go into more detail about the different biological relationships:  This relationship can be helpful to both symbionts, helpful to one but neutral to the other, or helpful to one but harmful to the other.  One or both of the symbionts might entirely depend on each other for survival or they might generally live independently.

symbiosis commensalism mutualism worksheets and activities

Biological-Interactions-WorksheetsTo wrap up our unit, we reviewed many of the new terms we had learned about the Biosphere.  🙂  The kids (and I!!) definitely learned a lot! 🙂

Biosphere-WorksheetsThis packet 170 page packet is $8.99 and contains all the materials mentioned above. See the Biology BUNDLE of 5 or Biology Bundle of 3 options!

Our units are PDF digital downloads.  Be sure to check your PayPal email address for the download link. If you have any questions or problems feel free to email me! You should get your automatic download link from SendOwl within a few minutes. If you don’t, be sure to email me if you need me to send the link to you again! Here are some answers to some Frequently Asked Questions. ~Liesl

Biology Packet on the Biosphere: Biomes, Ecosystems, Habitats, Feeding Relationships, Biological Interactions and More!

Biology Packet: $8.99

Don’t forget to check your PayPal email address for the download link.Biology Packet - Biomes Ecosystems Populations and more

Biology Packet - Ecosystems, Biomes, Food Chains, PopulationsBiology Unit Ecology - Biomes-Ecosystem-Habitats- relationships between living organisms and their physical environmentBiomes-Worksheets

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Biomes Worksheets and Cards - 70 Page Packet


Our units are PDF digital downloads.

Visit this Biology Bundle Page for more details (and lots more pictures!)

$44.99 Biology BUNDLE of 7: 1) Biology Unit (Biomes, habitats, food chains/webs, feeding relationships) 2)  Scientific Classification & Taxonomy Packet 3) Ocean Unit & Layers of the Ocean/Ocean Zone Activities 4) Cells Unit 5) Botany Unit 6) Pathogens Unit – Bacteria, Protozoa, Fungi, Parasites/worms; Viruses and Prions 7) New! The Cell Cycle and Mitosis

Again, you can see the Biology BUNDLE Page for lots more pictures!

Don’t forget to check your PayPal email address for the download link from SendOwl (the delivery service I use)!

Biology BUNDLE of 7 Biology Cells Ocean Plant Kingdom Pathogens Mitosis and more

$8.99 Biology Unit: Biomes, habitats, ecosystem, biological interactions, feeding relationships (170 pages)

$8.99  Cells Unit (150+ pages) – cell theory, prokaryotic vs. eukaryotic cells, animal vs. plant cells, organelles of the cell, chloroplast anatomy, the layers of a leaf, photosynthesis and more.

$7.99 Botany Packet — (80 pages) Plant Classification, Life Cycle of the Moss, Fern, Conifer, Angiosperms, Parts of a Flower, Parts of a Seed, Seed & Fruit Development, Monocots vs Dicots – plus Carnivorous Plants Mini-Unit

$8.99 Ocean Unit – Layers of the Ocean/Ocean Zone: (100+ pages) Marine Habitats, Coral Reefs, Tide Pools, Water Form Words, Ocean navigation, Features of the ocean floor, salinity, ocean tides & currents, ocean life, bioluminescence & more!

$7.99 Scientific Classification and Taxonomy Packet (100 pages) dichotomous key activity, Linnaeus & the history of classification, learn the Animalia phyla (Annelids, Platyhelminthes, Nematodes, Cnidaria, Animalia, etc.)

$8.99 Pathogens Packet (100 pages) – This unit covers the six major living and nonliving pathogens: bacteria, protozoa, fungi and parasites/worms as well as viruses and prions. The large majority of this packet goes into detail about bacteria and viruses.

 $5.99  The Cell Cycle and Mitosis Packet (50+ pages) – This unit covers topics/terms such as cell division, cell death (apoptosis), nucleosomes, histones, binary fission, chromatin, chromosomes, centromere, sister chromatids, and the lifespan of human cells as well as the stages of the cell cycle including interphase (G1, S, G2) and mitosis (prophase, anaphase, metaphase, telophase, cytokinesis)

Biology Packet Ecosystems Biomes Habitats Food Chains Food Webs Symbiosis Population WorksheetsCell Unit - Plant and Animal Cell Worksheets and ActivitiesScientific Classification and Taxonomy Unit for Middle School and early High School Ocean Unit - Marine Habitats Coral Reefs Tide Pools Tides Features of the Ocean Floor Fish Shapes and more worksheetsPathogens Unit - Worksheets and Activities on Bacteria Virus Protozoa Parasites Fungi PrionsCell Cycle and Mitosis Worksheet Packet

Again, you can see the Biology BUNDLE Page for lots more pictures!

Biology BUNDLE of 7 - cells biology pathogens oceans taxonomy mitosis and more

Biology BUNDLE of 3 - Biology - Taxonomy - Ocean Unit

Be sure to check your PayPal email address for the download link!

Animal Unit

For younger student, you might want to check out the Animal Unit:

Animal Unit - 100-page Animal Characteristics Vertebrates Invertebrates Spiders Insects Animal Homes and moreMore pictures of what is included can be found here: Animal Packet!


Vertebrate - invertebrate Montessori CardsFeathers Fur Scales or Skin Worksheets and Sorting Cards

Or you may want check out the Big Animal BUNDLE Options:

The Big Animal BUNDLE includes 8 packets.   1) Animal Unit, 2) World Animals Packet, 3) Rainforest Packet, 4) Life Cycles Packet, 5) Winter Packet – plus several mini units 6) the Cicadas Packet and 7) the Chameleon Packet. 8) the Wolves Mini-Unit.

The other Big Animal BUNDLE Option #2 also includes the Dinosaur Unit and the Australia Unit.

These Animal Units can each be purchased individually as well.

Big Animal Bundle Units

Don’t forget to check your PayPal email address for the download link.Visit Our Store to see our other packets

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You might also be interested in some of our other packets and printable:

Earth’s 4 Major Systems (FREE!): Atmosphere, Geosphere, Hydrosphere, Biosphere (free printable) – When we started our Biosphere unit, we went over the 4 major Earth systems again using these notebook pages. These pages review the 4 major ecosystems and is a good introduction to any unit on earth science, Earth’s atmosphere, biomes, ecosystems & animal habitats, or an ocean unit.


Earth Science Unit: In this unit we covered the solar system, the layers of the Earth, plate tectonics, the ring of fire, earthquake activity and volcanoes.

Earth-Science-Packet 150 page - worksheets hands-on activities and moreEarth Science Unit - Layers of the Earth Activities Types of Volcanoes Worksheets - Interactive Notebook Pages

Simple Machines Packet This packet include our hands on activities on levers,  wedges and more.


Digestive System Unit – This packet includes hands on activities about digestion, the length of the digestive tract and more

Digestive System Worksheets and ActivitiesSmall intestines, liver gall bladder pancreas large intestines notebook pages

Human Body System Worksheets

Human Body Systems BUNDLE

Human Body Systems and their Organs Human Body Systems Worksheets


Skeleton System Worksheets 


Rock and Minerals Worksheets – Worksheets plus our hands on activities on the three types of rocks


Native American Indians Worksheets 


Civil Rights Worksheets

Key Events of the Civil Rights Movement

Grammar Worksheets – Its/It’s Their/They’re/There; Comma Rules



Cells Worksheet Packet: Cell Theory, Eurkaryotic vs. Prokaryotic Cells, Cell Organelles, Animal vs. Plant Cells and More


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P.S. Our store is getting a bit of a make-over. Hooray!  I can’t tell you how many people have asked me if there was a way to purchase more than one item at a time.  Since I run this blog on my own and always super busy juggling our homeschooling (and homeschool planning), outside activities, and work on the website/business… it has taken a long time to get to this! (Sheepish grin here!)

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4 Responses

  1. Kylie says:

    Wow sounds a very thorough unit of work. We did all of this last year, it was so interesting and I think I learned as much as the kids!

    • homeschooldenadmin says:

      It was a fun unit! The kids especially liked the section we did on biological interactions. Many of those terms were new to us, though you know just from experience that some organisms benefit from one another (bee/flower), while some don’t mammals/fleas! Fun unit and I loved picking out all the pictures! 🙂
      Thanks for leaving a note. I’ll have to go check out and see what you’re up to these days! ~Liesl

  2. Tonya says:

    What age would you put this unit at? I have have a 4 and 7 year old. I am new to your site and trying to figure out the levels of the materials.

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