Archive for the 'Science at Home' Category

Investigate acid-base reactions by creating a volcanic eruption

Create your own volcanic eruption and investigate acid-base reactions.

You will need:

  • Baking soda
  • Vinegar
  • A “volcano” –a container to hold the reaction

(Note: a fun related art project is to create and paint your own volcano out of Plaster of Paris or paper-maché with a built-in well to hold the reagents.)

Safety Tips:

Provide paper towels to clean up the resulting eruption – it can be a fizzy mess. The lab’s reagents are harmless, but you should take care to avoid contact with your eyes.

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Make Your Own Glaciers

Give your students a hands-on glacier lesson with this chilly activity that originally appeared on sciencekit.com.

Materials Needed:

  • 2 Paper Cups
  • Water
  • Aluminum Foil
  • 2 Tbsp. Coarse Sand
  • Paper Towels

Instructions:

  1. Label one cup A and the other B. Place two spoonfuls of coarse sand in Cup B. Fill both cups with water and freeze until they are solid.
  2. Remove the ice from Cup A. Using a paper towel to hold the ice, rub the “bottom end” of the ice along the aluminum foil (the foil represents the surface of the Earth). Record your observations and repeat for Cup B.
  3. Have students compare their observations. How did they differ? Have students write in their journals how they think the rocks and other debris in a glacier change the surface of the earth.
  4. Extension Activity: Have students place their ice from Cup B in the center of the aluminum foil. After the ice has melted, ask students to explain what they think this process represents.

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Create Your Own Cloud

Build your own cloud with this fun activity, which originally appeared as part of the Henry Ward’s Adventures in Science series developed for Ward’s Homeschool. The activity is also available in PDF format on wardsci.com.

At Home Science Adventure

Witness a meteorological phenomenon and create your own cloud.

You will need:

  • One clear plastic soda bottle with label removed
  • Black construction paper
  • Water
  • Matches

Safety Tips:

Use caution when lighting matches and make sure there is adult supervision.

Experiment Steps:

  1. Pour 2 inches of very hot water into the bottle.
  2. Blow air into the bottle to ensure it is fully expanded, and then seal the bottle tightly. Vigorously shake the bottle for one minute.
  3. Light a match, let it burn for 2 seconds and drop it into the bottle. Quickly recap the bottle again.
  4. Lay the bottle on its side placing the paper behind it. Press hard on the bottle for ten seconds. Release and repeat until you see a cloud forming.
  5. Uncap the bottle and watch the cloud emerge from the bottle.

Explanation:

You just witnessed a cloud forming. This happens when the warm water heats the layer of air, and some of the water evaporates into the air forming water vapor that rises. The particles of smoke act as nuclei for water molecules to collect on in a process called condensation. Thus a cloud is born.

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Build Your Own Stethoscope

This fun, heart racing activity originally appeared as part of the Henry Ward’s Adventures in Science series developed for Ward’s Homeschool and is also available in PDF format.

At Home Science Adventure

Get your own heart racing with an exciting experiment to build your own stethoscope.

You will need:

  • A cardboard paper towel roll

Experiment Steps:

  1. Working in pairs, one person should hold the roll over the other’s heart.
  2. Listen for the partner’s heartbeat, counting the number of beats per 30 minute.
  3. Run in place for one minute and then listen for the heart beat again, calculating the new beats per minute.

Explanation:

Notice the difference in heartbeat after exercise. The reason for the increased rate is the heart beating faster to pump more blood, and therefore oxygen, to the body for use while exerting energy.

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Crystal Growing Activity

Expand your own geological collections by growing crystals at home or in the classroom. This fun activity originally appeared as part of the Henry Ward’s Adventures in Science series developed for Ward’s Homeschool and is also available in PDF format.

At Home Science Adventure

Expand your own geological collections by growing crystals at home.

You will need:

  • Three dry sponges
  • Aluminum cake or pie pan
  • Glass measuring cup
  • 1/4 cup water
  • 1/4 cup table salt
  • 1/4 cup laundry bluing
  • 2 Tbsp. household ammonia
  • Mixing bowl
  • Metal spoon
  • Blue and green food coloring

Safety Tips:

Avoid prolonged contact with the ammonia to avoid breathing in excess vapors.

Experiment Steps:

  1. Place the sponges inside the aluminum pan.
  2. Mix together salt, water, bluing, and ammonia in a bowl; then pour mixture over sponges, spreading evenly.
  3. Add food coloring randomly on sponges and let sit until you see results.

Explanation:

Growing your own crystal garden can take from hours to days, but you will eventually see these crystals appear and grow, teaching your child about the nature of this substance. Crystals are atoms or molecules joined together in a repeated pattern. They grow by adding molecules or atoms to all its sides in the same pattern as those added before. Examine your crystal garden for evidence of this scientific fact.

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Bring ‘Em Back Alive - An insect collecting resource

As spring arrives with warmer weather, field trips and outdoor activities are once again possible. Enhance and enrich your biology curriculum through hands-on activities with live specimens found in your own environment. A well planned field experience can significantly improve student understanding and information retention while they have fun learning.

Sweeping NetWhen capturing insects and other invertebrates, it is best to use a variety of collecting tools and techniques to find quality specimens. A sweeping or beating net can be used to collect a variety of insects – many of which may have gone unnoticed before being dislodged from their hiding places by the sweeping technique. You can also set simple insect traps – cans or jars buried in the ground, level with the soil surface – to catch ground-dwelling insects and other small arthropods. A bait of rotting fruit or meat will attract more specimens. Use a trowel to dig into rotting logs or the soil itself to find insect larvae, nematodes, and earthworms. Collect leaf litter and bring it back to the lab, then use a berlese funnel to separate the many small organisms in the material. You can collect the specimens live, or preserve them in alcohol in the collecting jar below the funnel.

And, each field experience can later be brought into the classroom. The fun begins when you bring your “catches” back to the lab for observation. Once in the lab, terraria, plastic cages, “bug dorms” or simple containers like jars with perforated lids can be used to house insects, spiders, and similar organisms. Ward’s Ant Nest is ideal for ants, and when filled with damp soil could also house earthworms or nematodes. Use collected earthworms in conjunction with a composting kit to study how these annelids aid in recycling materials.

Your students can put the assorted specimens collected into a plastic terrarium for observation. Collect some plants or plant parts from where you used the sweeping net to provide food and cover for your insect “zoo”. Insects can be kept in this manner until the semester ends; at which time they can be released back into their natural environment.

Continue reading ‘Bring ‘Em Back Alive - An insect collecting resource’





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