Earthworms hatch from eggs and can grow up to a metre or more in length! Some earthworms are also able to regrow small parts of their body that have been lost or injured. Earthworms have both sperm and eggs within their bodies they are hermaphrodites but they cannot self-fertilise and need to mate with another individual. After mating, a cocoon containing the fertilised eggs is deposited in the soil.
Earthworm nutrition comes from a variety of sources, depending on their species. Food types include manure, compost, plant material, fungi, microorganisms and decaying animals. They take in food through their mouths. Based on the information above, we can confidently categorise earthworms as living things as they carry out all seven life processes.
It is now possible to classify them further into a series of hierarchical categories: kingdom, phylum, class, order, family, genus and species. Classifying living things into these categories is an important way for scientists to show how living things are related to each other.
Most scientists classify living things into one of the following six kingdoms. What did you decide? Sometimes people are surprised to find out that earthworms are actually animals — the same kingdom as humans, cats, dogs, dolphins and spiders! Just as living things share a set of common characteristics, animals have key characteristics that can help you to decide whether a living thing is an animal or not.
Scientists need scientific vocabulary to communicate effectively. At an even more fundamental level, scientific language actually helps shape ideas and provides the means for constructing scientific understandings and explanations. Animals have babies and most plants use seeds. Living things are able to sense their surroundings. For example, a living thing can respond to a change in sound, heat, or light. All living things grow and develop.
While growing, some living things just get bigger, while others go through a change in their appearance. Living things need to get energy from food out of their cells to stay alive. This process, which is called respiration, can be done using the gas oxygen. Students could take digital photos and create a montage.
A good case could be argued that the freshly picked tomato is alive because it is able to maintain its biological integrity for a considerable period of time after picking; i. This provides good content for an interpretive discussion requiring students to use reasoning to justify their arguments because the answer is not clear cut; different opinions are likely and the discussion will open up a range of questions and relevant issues.
Other questions to explore could be whether a computer which is turned on is alive; whether a hibernating bear is alive; and whether a deciduous tree in winter is alive.
Consider listing key questions that arise in relation to this issue or review these ideas over time with students. Our website uses a free tool to translate into other languages.
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