ingridscience

Animal adaptations for Primaries

Summary
Choose activities from modeling how different animals eat, comparing animal skulls and skeletons, build animals with fins and wings.
skeletons, barnacles, wings and fins, eye cards
Procedure

Set up activities as stations or for the whole class to work on.

Introduction and focus
Animals need to 1. find food, and 2. run away and hide from other animals that want to eat them.
Animal 'adaptations', or their features help them do this so that they can stay alive.

Activity descriptions:

In a circle, carefully pass around prey and predator skulls, looking at the shape of the teeth, then the placement of the eyes, and for how they help an animal find food, and escape being eaten.

Model different ways that animals eat with animal eating styles activity (grabbing, stabbing, sucking, sieving).
Review the different tools that students tried with images of animals eating in the different ways.

Find camouflaged animals in photos. Camouflage helps animals hide from predators, as well as hiding to get closer to prey.

Some animals don't have legs. They have wings (like a bird) or fins (like a fish).
Build fins and wings onto playdough bodies to create your own winged/finned animal.
Look at a sheet of birds and fish drawings for real examples and ideas.

Build a skeleton of a deer or look at a snake skeleton. Compare how the skeleton is different from ours, and how each of our skeletons help us survive.

Look at barnacles feeding - they don't have legs and they can't move, but they have their own adaptations to eat and survive.

Look at pictures of different animal eyes - so many shapes and colours, but all for seeing surroundings, finding food and avoiding predators.
e.g. https://commons.wikimedia.org/wiki/File:Animal-Eyes.jpg (but no labels!)

Grades taught
Gr K
Gr 1
Gr 2
Gr 3

Earth, Sun and Moon Positions and their Effects

Summary
Model the Phases of the Moon and the Seasons. Activities on the effects of the Seasons on living things.
Materials
  • Space that can be made completely dark
  • Materials in the activities
Procedure

Activity sequence idea 1:
Scale model of Sun/Earth/Moon
Visualise a complete rotation of the Moon around the Earth, through the seasons.
Seasons model demo
Phases of the Moon activity

Activity sequence idea 2:
Scale model of Sun/Earth/Moon
Model how the Moon causes tides as its gravity pulls on the oceans.
Show barnacles feeding as they are submerged by water, as when the tide comes in.

Activity sequence 3:
Leaves turn colours before they drop from trees in the Fall. What colours do we see?
One of these colours is in leaves all year but is hidden until the green disappears in the Fall.
We’ll use a technique to separate out the colours in leaves, so we can find the hidden colour.
Set up leaf colours.
Move to a dark area in the school (gym with no windows/basement/behind curtains on a stage).
Demonstrate why we get
seasons.
Because the Earth is tilted, the amount of sunlight reaching Canada in the Northern hemisphere changes through the year. In the summer we are tilted towards the sun, in the winter we are tilted away. (The Southern hemisphere is the opposite, so has summer and winter at opposite times of year from us.)
Model why the Moon looks different at different times of the month with Phases of the Moon activity.
Leaf colours revisit and discussion.
Green leaves have green and yellow pigments in them.
In the summer leaves are green. They also contain yellow pigment but it is masked by the green.
In the fall, as the leaf starts to die in preparation for falling off, the green pigment breaks down and loses its colour. The yellow colour then becomes visible. So some fall leaves turn yellow. (The red colour of other Fall leaves are by a different mechanism.)

One way that animals adapt for the winter is making a new coat of thicker feathers or fur, to keep them warm in the colder months.
Some animals also change the colour of their fur/feather colours between summer and winter, so that they are better camouflaged in each season. Look at photos e.g. ptarmigan birds in summer and winter.

Indigenous groups, such as the Musqueam, Squamish, and Tsleil-Waututh First Nations, who’s land we are on, have a traditional ‘Seasonal Round’, to harvest food and make tools when each food/material becomes abundant in each season.
Optionally use this poster: https://www.vashonheritagemuseum.org/shop/p/coast-salish-seasonal-round…

Notes

Other Effects to include in this lesson:
Animals adapting to winter - feather, fur activities (look up close for function?)
Hibernation/migration
Tides and effects on animals - see Moon lesson
Nocturnal/Diurnal animals?

Grades taught
Gr 1
Gr 2
Gr 3
Gr 4

Nitrogen cycle through salmon to trees

Summary
Follow the nitrogen as it breaks down from salmon flesh to ammonia (ammonification). Plants can absorb ammonia from soil.
Procedure

Salmon bring nitrogen from the ocean into the temperate rainforest of the Pacific Northwest.
This activity shows how using molecule models.

Spawning salmon swim upstream, into the forests of the Pacific Northwest.
They either die on the river banks after spawning, or are caught by animals and taken into the forest to be eaten. Carcasses are left behind by bears, coyotes, cougars, racoons, eagles, crows etc.

See what happens to the salmon's carcass as it decomposes on the forest floor:
Inside the salmon is muscle which is made of protein. (That's why fish is a good source of protein for us.)
Zoom into the muscle to the molecules that make it up:
https://www.mdpi.com/molecules/molecules-26-01559/article_deploy/html/i…
or https://edis.ifas.ufl.edu/image/FS454/Dtxd3vzk72/Ijalvp6fin/Ijalvp6fin-…
(Molecules are tiny tiny particles that make up matter. Too small to see individually, but trillions of them together make up everything areound us.)
Lay out molecule model of protein in a salmon’s body.
The molecule is made up of atoms.
We will look at one atom, the nitrogen, and see how it moves through the food web.
Find the nitrogen atoms in this protein molecule - the blue atoms. (Blue is the international symbol for a nitrogen atom worldwide.)

The salmon protein first is broken down by bacteria in the soil, into its units.
Break the protein apart and give each student a piece. Ask students to combine their piece with water, as the soil bacteria do. (show image)
The nitrogen atoms are now part of single units of protein (amino acids).
The decomposition does not stop here.
The amino acid breaks apart to form ammonia (show image). Ask students to make a molecule of ammonia from their amino acid.
Ammonia is taken up by plant roots, and is a rich nutrient, allowing our Pacific Northwest trees to grow huge.
Plants get nitrogen from salmon! 3/4 of plant nitrogen in the temperate rainforest is from salmon!

Give students more oxygen atoms so that they can make the other decomposition products, water and carbon dioxide (show image).
Make these molecules of decomposition using these extra oxygens.

Then if time, free play molecule building.

Grades taught
Gr 2
Gr 3

Separating heterogeneous mixtures including Indigenous methods

Summary
Separate a mixture using different methods, then relate to Indigenous separation methods. Model a clam basket separating clams and sand. Learn how to twine, an Indigenous weaving method used to make clam baskets.
Procedure

Challenge students to separate a mixture of materials using various tools.
Name the methods they used, and give real life (including some industrial) examples, and Indigenous uses of separating materials for harvesting food.

Model a clam basket separating clams from sand.

Learn how to twine, an Indigenous weaving method for making clam baskets (and other woven tools and clothing).

Grades taught
Gr 6

Separating a heterogeneous mixture

Summary
Challenge students to separate the components of a heterogeneous mixture (marbles, gravel, sand, vermiculite) using a variety of tools (sieve, magnets, filter paper and water).
Materials

Per small student group:

  • small pot containing a mixture of materials:
  • 6 marbles
  • 2 Tbspns gravel
  • 2 Tbspns sand (e.g. sieved beach sand to remove shells and plants)
  • 2 Tbspns potting soil (sieved to remove plant materials), or vermiculite/styrofoam balls
  • tools to separate the materials:
  • tall tubs e.g yogurt tub
  • sieve
  • filter papers (not dollar store - need good quality)
  • 3 mini binder clips to secure filter paper over tub
  • magnets
  • bottle of water
  • large tray to work in and contain mess
  • little cups to put separated materials into
Procedure

Tell students they will separate a mixture of materials from the mixture in the pot. They will separate the marbles from the gravel from the sand from the magnetic sand from the soil/vermiculite, as best as they can, and add each separated material to its own little cup. Tell them that there are many routes to separating each of the materials out.
Show them how to use the sieve, and how to use the clips to secure the filter paper over the tall tub.
Students should work in a tray to contain any mess.

As students work, name the methods of separation and write up on the board as they occur:
handpicking (picking one material from a mix to separate it out)
sieving (using a sieve which catches larger materials while allowing smaller materials to pass through it)
filtration (using a filter to catch materials that are too large to pass through the filter, while allowing the liquid to flow through)
magnetic separation (using a magnet to pick up and separate out materials that are attracted to a magnet i.e. they contain iron)
sedimentation (adding materials to water to separate those that sink)
flotation (adding materials to water to separate those that float)

Circulate to encourage students to try different methods to separate out materials in their mix into different little cups.
Do not require the separation to be perfect, but that students try the different separation tools.

Once they have all separated as best they can, review the separation methods that have been written up on the board, and how students used them.
There are different paths to separating out the materials, but some, in retrospect, are more efficient (e.g. separating out the magnetic sand before it gets wet). Mass separation methods of the food industry, or separating metals from rock, use the most efficient route.
Add in other local processes that use any of these methods:
cranberries are harvested in the Lower Mainland by flotation
Pacific Northwest Indigenous oolichan grease prepared by flotation
Pacific Northwest Indigenous clam baskets and the sustainable gill nets are sieving/filtration methods.
Water purification plants use sedimentation and flotation methods.
Metal extraction from iron ore uses large scale sieving, magnetic separation and flotation.

Other kinds of separation, maybe as a demonstration:
Separate seeds from a plant (faster than handpicking) by threshing (shake in bag), then winnowing (blow off lighter parts).
https://bcfarmsandfood.com/six-ways-to-screen-and-winnow-seeds/
Separate materials of different densities by swirling and shaking in a wide pan, called yandying by Indigenous Australian cultures, also how gold panning works.

Notes

Apply these (and/or other) separation methods to model an industrial separation process e.g. separating copper from calchopyrite.

Grades taught
Gr 6

Science as Active Inquiry

Summary
Grounded teaching philosophy behind the Play-Debrief-Replay teaching method, and many ideas of how to set up this instructional model in your classroom.
Type of resource
Book
Resource details

Science as Active Inquiry: A Teacher's Guide to the Development of Effective Science Teaching by Selma Wassermann and J.W. George Ivany. Rowman and Littlefield 2022

Notes

An awesome updated 3rd edition. Loads of ideas, as well as help and inspiration for teaching science by the play-debrief-play method.

A summary of the method, with my own small additions:

Stage 1: Play (Gathering Knowledge)
Set up enough stations so that students have enough space and materials to work without competing for space and materials. Tell the students how much time you will give them for a particular centre. Wassermann and Ivany suggest 10 to 15 minutes. Ideally, allow students to work as long as most of them are engaged - then they have time to test many ideas and explore more deeply.
While the students are manipulating, circulate with generally encouraging comments, but none that are directive or evaluative. You want the ideas of what further to research to come from your students. For many free experimentation activities, I like to add note-taking, so that students can refer to them later when they may have forgotten exactly what they tried.
Stage 2: Debrief (Promoting Understanding)
Call your students to a different space to debrief, bringing their notes with them.
This time should be a safe time for all students. All students should be able to share what they discovered without judgement. If some students disagree on a result, you help them engage in respectful debate, and discuss how to proceed (e.g. repeat the experiment to confirm results, try the experiment in a different way). Ask the students how they might test their ideas as to why something is working a certain way, and write the ideas on the board. At this point, I pair and group students with similar ideas/interests to work together for the Replay, and give them a question(s) to focus on.
Stage 3: Replay (Applying Knowledge)
Students go back to the materials, focusing on addressing the ideas that came up during Debriefing. Students may choose one of the ideas to test, or test several if they have time - this may need to be organized by the teacher. This is a time for students to do duplicate experiments, use controls, make sure of fair testing etc, to be as rigorous as they can - these methods should be familiar to the students or explained to them before and during their experimentation.
Stage 4 (optional): Final Debrief
At a final debrief, students report on what they found and the class concludes what they have learned so far. (There will be many questions still unanswered, which is real science!)

Wind turbine

Summary
Convert wind energy into electrical energy, by hooking a generator (backwards motor) to a low-volt LED light.
Materials
  • motor, high voltage for relatively low rpm (this Vernier motor recommended)
  • 'super red' low voltage LED bulb (1.9-2.1V worked for me)
  • little fan e.g. dollar store mini windmill, or purchased propellor
Procedure

Note that a motor and a generator are the same device, run in opposite directions.

First test that the generator can generate enough voltage to light the bulb:
Attach the bulb to the motor terminals (check orientation) and spin the shaft with a flick of your fingers.
If the bulb briefly lights up brightly, the motor might also work with a blade attached.

Either use a purchased propellor, or make your own:
Take the handle off a mini windmill (dollar store fine), and glue a dowel or other shaft through the blades, which can be drilled out to fit snugly over the motor shaft (often 2mm diameter).
Attach the fan to the motor shaft.

Students tape the motor wires to the LED terminals on their desk, matching black to black and red to red. They blow on the fan/propellor to make the motor turn and light the bulb.
(Using an alternate motor to the one recommended, it may take quite a hard breath to get the bulb to light, and your breath might have to be at just the right angle. A leaf blower may spin the fan fast enough to light the bulb.)
Students can build multiple wind turbines into parallel circuits. Blowing on them simultaneously lights the bulb more easily and brightly. (It can also make a stationary fan turn as power from one turbine feeds to another.)

A real wind turbine has huge blades with a shape designed to best catch the wind. The generator is housed in the ‘nacelle’, along with the gearbox which translates the rotation of the blades to a speed that effectively turns the generator.

Diagram of the parts of a real wind turbine: https://upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Wind_turbine_…
Vertical rotor blade designs: https://windmillstech.com/vertical-axis-wind-turbines/
Extensive wind energy education site: https://windmillstech.com/

Notes

Activity inspired by https://www.exploratorium.edu/snacks/light-wind
It took quite a bit of messing around to find a suitable motor or enough wind power to get this working (a leaf blower can give more wind than your breath! or try can of compressed air?)

Technically, a turbine is the part with the blades, but for wind energy, they call the whole thing including the generator a turbine.

Grades taught
Gr 3
Gr 4
Gr 5
Gr 6
Gr 7

Sustainable food sources, food chains and interdependence

Summary
Look at the skeleton of an animal and learn about how every part is used for many things besides food. Model sustainable Indigenous harvesting methods - fish trap and clam baskets.
Materials

Materials in the activities.
Seasonal round poster if available. e.g. https://www.vashonheritagemuseum.org/shop/p/coast-salish-seasonal-round…

Procedure

Indigenous people that live here, and have done for thousands of years, have a respectful relationship with the animals they catch for food, including thanking an animal for giving their life to feed people.

Acknowledge that we are on Indigenous land.
In Vancouver, we live, work and play on the unceded land of the Musqueam, Squamish, and Tsleil-Waututh First Nations.

Choose a selection of the activities.

Assemble the deer skeleton. Talk about how it may have died. Its body is used by, and help sustains, many other living things: animals gnaw the meat from the bones, bacteria and fungi decompose the meat and bones to valuable nutrients which leech into the soil, and are then used by plants to grow.
Humans can use many parts of an animal that they kill, and Pacific Northwest Indigenous groups make it a point to thank the animal for its life and to use every part of its body. Hooves and bones used to make tools, knife handles, spoons, arrowheads and fish hooks. Sinews (tendons/ligaments) for bow strings, fishing lines, thread.

We are eating sustainably when we only eat what we need, and get food in a way that protects ecosystem diversity. Then we leave healthy environments and food sources for the generations after us.
We will model two Coast Salish harvesting methods, both sustainable.
Set up stations of two sustainable food harvesting methods:
Clam baskets - harvesting by hand means that the clam beds are not overused
Fish traps - once enough fish for eating are caught, the remaining ones can be released

Look at the seasonal round poster (if available).
Show the basket weaving and clam fishing in the Winter. Show pics of real clam baskets.
In the Summer, fish are plentiful and the sockeye salmon are running. Fish are dried and smoked to eat in the winter.
In the Fall, large game such as deer are caught (for meat and for making leather goods among many other uses.

Show a version of the Pin and ring game made from animal bones.
Then students can try their own games made from recycled materials (cardboard tubes and chopsticks).

Notes

The Seasonal Round lesson plan includes many of the same activities.

Grades taught
Gr K
Gr 4

Carbon cycle, fossil fuels and renewable energy

Summary
Review the carbon cycle and understand where fossil fuels enter the cycle. Explore a renewable alternative to fossil fuels.
Procedure

Carbon cycles through living things, the atmosphere, the oceans, the Earth and rocks:
Carbon moves between the air and animals/plants in Fast carbon cycles (respiration, photosynthesis and fermentation).
Carbon moves between the air and ocean water in a Fast carbon cycle.
Carbon moves into animal shells and rocks, and through the rock cycle in Slow carbon cycles.
Carbon is returned to the atmosphere through weathering in a Slow carbon cycle.
Carbon is returned to the atmosphere in large amounts via outgassing of volcanoes.

Humans are putting carbon into the atmosphere at a fast rate by burning fossil fuels.
Sometimes rocks form from plants and animals to make fossil fuels - coal, oil and natural gas.
We burn fossil fuels for energy.
Demonstrate burning fossil fuels using a candle (wax is a petroleum product).
Burning fossil fuels puts carbon dioxide into the air very fast, faster than it can cycle back into living things and rocks.
We need to stop burning fossil fuels for energy and use renewable sources only.

Wind energy is renewable.
Students make a device that turns in the wind, and learn about the key parts of a wind turbine (a part that spins and blades to catch the wind).
Wind turbines are hooked to a generator, to make electricity.
Demonstrate a wind turbine.
Wind turbine videos:
https://www.youtube.com/watch?v=SQpbTTGe_gk (2.5 mins)
https://www.youtube.com/watch?v=xy9nj94xvKA (5 mins)

Notes

Lesson 6 of 6 of a series on the Carbon Cycle.
Good image of the whole carbon cycle at https://www.britannica.com/science/carbon-cycle (drawing in photo is simplified version of this)

Grades taught
Gr 2
Gr 3
Gr 5
Gr 6