ingridscience

Dry ice activities

Summary
Do a series of activities using dry ice.
Focus on States of Matter, or Weather, or just dry ice fun.
Materials

Materials in the chosen activities

Procedure

Do a selection of activities.

For a States of Matter focus:
Review states of matter.
Draw up a temperature number line and add the state changes in water.
Show dry ice, discuss when it sublimates, and add it to the number line.
Dry ice squealing on a spoon demonstration - the metal speeds up sublimation.
Dry ice in tubs on table groups to observe clouds.
Show students how to make tornados.
End with a lemonade soda drink (add dry ice to lemonade in a pitcher, then sieve before distributing to students for drinking).

Grades taught
Gr 2
Gr 3
Gr 4
Gr 5

Air cannon (with dry ice)

Summary
Make a fast-moving vortex of gas emerge from a box with a hole. Adding dry ice to the box makes the vortex visible.
Science topic (2005 curriculum connection)
Physical Science: Force and Motion (grade 1)
Physical Science: Forces and Simple Machines (grade 5)
Materials
  • cardboard box
  • scissors and tape
  • plastic bag
  • dry ice and gloves to handle
  • warm water
  • container to hold the dry ice that will fit in the box
    Procedure

    Construct the cannon:
    Cut a hole on one side of the box (works best if this is about half the diameter of the box).
    Cut part of the other side of the box out, and tape a plastic bag over it, so it is a little flexible.
    Add a handle to the plastic with tape, so that it can be pulled back and forth.

    Add the container of warm water and dry ice to the box.
    Once the box fills with dry ice gas, draw back the plastic then move it forwards quickly.
    A vortex of gas should emerge from the hole (best seen against a dark background).

    Scaled down, individuals can each make their own vortex.

    Notes

    http://www.waynesthisandthat.com/airblasters.html

    With no dry ice in the box, a vortex of air is still made, which will travel to move light objects on the other side of the room.

    Grades taught
    Gr 4

    Dry ice squealing and vibrating

    Summary
    Press on a piece of dry ice with a spoon to make squealing noises. A dry ice nugget vibrates on a spoon.
    Science topic (2005 curriculum connection)
    Physical Science: Properties of Matter (grade 2)
    Physical Science: Light and Sound (grade 4)
    Physical Science: Chemistry (grade 7)
    Materials
    • dry ice and gloves to handle
    • aluminium pie plate
    • metal spoon
    • coins
    Procedure

    1. Place a nugget of dry ice in an empty aluminum pie pan and press on it with a metal spoon. You should hear squealing or squeaking sounds as the spoon and pan vibrates. This is caused by heat from the spoon and pan warming the carbon dioxide and changing it from solid to gas (sublimation), which then pushes the ice away from the spoon and pan, causing them to vibrate.

    2. A nugget of dry ice vibrates on a spoon as it sublimates and the gas escapes under it. Once the dry ice has cooled the spoon down, the vibration stops, and water vapour in the air turns to ice crystals on the cool spoon.

    3. Press side of coins into dry ice. The coins flip back and forth. The warm coins heat the dry ice and turn it to gas. The gas escapes in the enclosed space pushing the coin back and forth.

    Grades taught
    Gr 2
    Gr 3
    Gr 4
    Gr 5

    Dry ice bubbles

    Summary
    Use detergent with dry ice bubbling in water, to produce bubbles filled with carbon dioxide gas.
    Science topic (2005 curriculum connection)
    Physical Science: Properties of Matter (grade 2)
    Materials
    • dry ice and gloves to handle
    • warm water
    • large empty drink bottle
    • plastic tubing
    • small styrofoam cup
    • dish soap mixed with water in a small container
    Procedure

    Push one end of the tubing through the base of the polystyrene cup.
    If a funnel is available attach to the other end of the tubing, using tape if necessary to seal any gaps.

    Add warm water and a (gloved) handful of dry ice pellet to the bottle, to start the bubbling.
    Place the funnel over the bottle, so that dry ice is pushed along the tubing.

    Once dry ice gas is coming out of the tubing at the end with the styrofoam cup, dip the rim of the cup into the container of detergent.
    A large bubble should form with swirling dry ice inside.

    The dry ice bubbles will fall quite rapidly, as carbon dioxide is heavier than air.
    They are fun to have pop on your hand, when the dry ice cloud flows out of them.

    As the dry ice bubbling in the bottle slows, replace the now cold water with more warm, and add more dry ice pellets if necessary

    Grades taught
    Gr 2
    Gr 3

    Earth Science Collection

    Summary
    A random collection of earth science activities.
    Curriculum connection (2005 science topic)
    Earth and Space Science: Renewable and Non-Renewable Resources (grade 5)
    Procedure

    Do the activities in turn.

    The fluorescence activity is only the fluorescent rock.

    Grades taught
    Gr 7

    Rock cycle crayon model

    Summary
    Shave crayons to make different "minerals", then compress and melt them to form "sedimentary" and "igneous" rock.
    Science topic (2005 curriculum connection)
    Earth and Space Science: Renewable and Non-Renewable Resources (grade 5)
    Earth and Space Science: Earth's Crust (grade 7)
    Materials
    • crayons of different colours
    • pencil sharpener
    • foil mini pie cases
    • greaseproof paper
    • hammer
    • hair dryer
    Procedure

    Use a pencil sharpener to make crayon shavings of different colours into the pie cases.
    This represents sand and mud made up of different "minerals".
    Fold several colours into greaseproof paper and hammer it flat. The minerals are pressed together into one piece of "sedimentary rock".
    Place the pieces of sedimentary rock into a pie case, then heat with a hair dryer. As they start to melt together they represent "metamorphic rock", then as they flow together completely they are "magma" inside the earth. As they cool to form a mixture of minerals they are "igneous" rock.

    Notes

    Needs reworking to more accurately represent what happens in the rock cycle.

    Do with just one colour crayon: https://serc.carleton.edu/sp/mnstep/activities/34972.html
    Nice formation of different kinds of igneous rock (resolidify melted crayon fast and slowly).

    Do all on a piece of foil.
    Use pencil sharpener/knife as a scraper to add a layer of one colour, fold over foil to press, then add another colour, fold over to press and stand on it.
    Layers formed but still flaky - sedimentary.
    Metamorphic - somehow give it a little heat so it starts to blend.
    Fold up the sides of the foil and put in a tray of just-boiled water for melting. Better than a flame, which makes the crayon give off fumes.

    Grades taught
    Gr 7

    Chemistry activities selection

    Summary
    A diverse selection of appealing chemistry activities for discussion of molecules and chemical reactions.
    Curriculum connection (2005 science topic)
    Physical Science: Chemistry (grade 7)
    Procedure

    These fun activities are not particularly connected, except that they can all be discussed in terms of chemistry.
    I used them in camp and workshop settings, but can be adapted for the classroom.

    Optional: hand out name tags, that depict the molecules to be used in the workshop (see image for baking soda/soda drink/rocket/bubbles lesson).

    Introduce the building blocks of chemistry through molecular models, and discuss what they represent.

    Do a selection of the activities, focusing on the chemistry in each case.

    Notes

    CAGIS workshop covered baking soda/vinegar reaction, then soda drink, then rocket, then bubbles.
    Eton Arrowsmith Camp played with molecule models, then did silly putty, soda drink, rocket.

    Grades taught
    Gr K
    Gr 3
    Gr 5
    Gr 7

    Motors

    Summary
    Make a simple motor to see how they work. Use a motor to make an art scribbling machine.
    Procedure

    Make a simple hand-wound motor, to show students how motors work.
    Then use motors for other activities:
    Build a motor into an electric circuit, and allow motor free-play, including making fans, buzz saws and spin art.
    Use a motor to drive a scribbling machine. Offsetting the motor (making it wobble) changes the art made.

    Grades taught
    Gr 5
    Gr 6
    Gr 7

    Biodiversity

    Summary
    Explore the diversity of living things through activities that highlight life's variation.
    Materials
    • materials in the activities
    • tree of life (evolutionary tree) poster e.g. this one
    Procedure

    Use this awesome website: onezoom.org

    Activity grouping ideas:

    Biodiversity in a Food web and Pond life
    Model a food web of the temperate rain forest, and understand why biodiversity makes an ecosystem resilient.
    Look together at Tree of Life poster, to find the living things in our forests, and see the array of other living things that live in their own ecosystems.
    Pond dipping activity to discover the biodiversity of tiny pond animals that we do not usually notice.

    Biodiversity and Biomes
    Look at a Biome map, discuss their broad climate differences, including our temperate rainforest of the Pacific Northwest.
    Optional: Sun's angle on earth activity to explain the differences in climate in biomes.
    Model a food web of the temperate rain forest.
    Camouflage challenge to model how living things in any biome use camouflage to increase their chances of survival.
    (Also see Biomes lesson plan for alternate activity ideas on this topic.)

    Biodiversity and Life cycles
    Look together at Tree of Life poster, and note the diversity of living things, and how they are similar and different from each other.
    Food web model including deer, to show how living things depend on each other for their survival.
    Build a deer skeleton with discussion on how the deer died, and what ate it after its death.

    Biodiversity of animals
    Look together at Tree of Life poster, and note the diversity of living things, and how they are similar and different from each other.
    Do two of these activities.
    Find animals on the poster with bones, then build a deer skeleton, asking students to find the same bones in their body.
    Find all the animals on the poster that do not have bones (a lot of them!) then look at an animal without bones: worm observation.
    Pond dipping to discover the diversity of tiny pond animals, then find pond water life on the poster e.g. shrimp, floating pond plant.

    Biodiversity and survival
    Highlight how many living things there are in a tiny square of ground: habitat survey with food web. Extrapolate to the larger world and the enormous amount of biodiversity.
    Animals are often coloured like their surroundings to help them hide (whether they are prey or predator). Students can use their same square for the camouflage challenge.

    Plant biodiversity: flower colours and plant smell molecules
    Flower colour activity to show how flowers use just a few molecules to make all their colours, which attract pollinators.
    Plant smells also attract pollinators (and have other uses):
    Smell molecule posting game for younger students.
    Matching plant smells and discovering their smell molecules for older students.

    Notes

    The Food Chains lesson has similiar activities, but with a different discussion focus.
    Pond dipping and posting game also make up the Classification lesson, but with a different discussion focus.

    Grades taught
    Gr 2
    Gr 3
    Gr 4
    Gr 5
    Gr 6

    Chemistry of plants and soil

    Summary
    Do soil tests, and understand the role that plants have in the nitrogen cycle.
    Curriculum connection (2005 science topic)
    Life Science: Needs of Living Things (grade 1)
    Life Science: Plant Growth and Changes (grade 3)
    Physical Science: Chemistry (grade 7)
    Procedure

    We will look at the chemistry of our environment.
    What is chemistry? Everything is made up of molecules, too small to see, even the air.
    Show model of molecules, made of atoms. We will show what is happening with the real molecules using these models. These molecules interact with each other, break apart and form other molecules.
    We will look at the chemistry in soil and how living things use the soil molecules.

    Walk to collect soil then back in the classroom, do soil tests.

    Look at pH results and discuss how the pH changes (see soil test activity).

    While the colour is developing for nitrogen test, use molecule models to look at the chemistry of nitrogen in the environment:
    Nitrogen cycle with molecule models

    Then look at nitrogen and phosphorus and potassium test results.
    Discus importance of these other minerals (see soil test activity).

    Many other minerals needed by plants.
    We eat the plants and get these minerals too, and use them in our own chemistry.

    Grades taught
    Gr 6
    Gr 7