What Do Living Things Have In Common?
Grade level(s):Grade 3, Grade 4, Grade 5
Topic:Characteristics of living things
All living things share common characteristics.
reproduce, respire (release energy from food), use energy, excrete, grow, move, sense, respond
What you need:
1)Record sheet (attachment), 2)chart paper entitled: "All students think that living things have these characteristics in common", 3) chart paper entitled: "Some students think that living things have these characteristics in common", 4)written sentence starters: " What makes you think that?" "But what about_________?""What evidence do you have that_________?"
Brainstorming: Small groups of 3 or 4
Then whole group for sharing out and group discussion.
Brainstorming - 10 minutes
Reaching consensus and generating list - 30 minutes
Students work in teams to discuss the question "What do all living things have in common?" They record their ideas and share their background knowledge. Then the groups come together and try to reach consensus about the characteristics that all living things share by asking each other questions and defending their ideas.
This is the first lesson from the unit, "What is a Living Thing, and How Does a Living Thing Respond to Its Environment?" The unit is designed to supplement the adopted FOSS curriculum on life sciences. In this unit students are given time to think about and discuss the fundamental question, "What is a Living Thing?" They are also introduced to a process for planning science investigations on the topic of how different living things interact with their environment. The unit ends with students deciding on a testable question, designing an investigation, doing the investigation, collecting data and drawing conclusions. Students then create poster presentations of their investigation for a grade level science fair.
Students will be able to identify common characteristics of living things.
Students will look for evidence of the characteristics of living things to help identify an object as living or non-living.
Students will practice being skeptical and defending a position.
Living things are made up of one or more cells, use energy (which includes nutrition, excretion, respiration), grow and develop, reproduce, and respond to their surroundings (which includes movement and sensation).
Xerox 1 record sheet (attachment) for each group. Make sentence strips for discussion starters. If you are teaching the entire unit, make science journals for each student.
Lesson Implementation / Outline
Tell students that today they will be working as a community of scientists. Their job as a class will be to create a list of what all living things have in common. They will use the list on another day to help them decide which objects are living and which are non-living.
Assign students to groups of 4 for brainstorming activity. Hand out record sheet and assign recorder. Give each team time to write down their ideas, when they agreed or disagreed with each other, and questions that they have about living things.
Do brainstorm activity. Interact with groups, ask questions, record responses or discussions for informal assessment of background knowledge, misconceptions, and level of participation.
Choose a student from each group to report one thing that their group agreed all living things did or had. List on board. Provide definitions of vocabulary that some students may not know.
Have class vote if they agree with each characteristic listed. Those that everyone agrees with are written on the "All students agree..." chart.
Those characteristics not agreed upon will then be discussed. Introduce sentence starters to help students ask clarifying questions and challenge others to defend their ideas. Encourage students to be open to other people's ideas and at the same time, let someone know if they disagree with him or her and why.
If there is still disagreement about a characteristic after discussion, or if there is not time to discuss all characteristics, then write those characteristics on the "Some people think..." chart.
Use record sheets, and student small group and whole group discussions to assess student background knowledge and ability to provide reasons to support his/her ideas.
Have a student volunteer read the two charts. Tell students that the class will use the charts in later science lessons and that the class will go back and review the charts from time to time to see if they want to add anything or make changes.
Extensions and Reflections
I have found that for students to have a good understanding of the structures and functions of living things and how they adapt to environmental changes, they must first have an opportunity to reflect upon and discuss their basic understanding of what a living thing is. That is the primary goal of this lesson and the lesson that follows it.
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