Tag Archives: weather

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Our post today was inspired by Clouds: A Compare and Contrast Book by Katharine Hall.

Young readers explore the concept of comparing and contrasting, while at the same time learning about different kinds of clouds and how to describe them.

Some clouds are big and fluffy;
others are thin and wispy.

The simple picture book book is illustrated with a series of two-page spreads filled with gorgeous color photographs of different types of clouds, like the one on the cover.

The real treasure, however, is the "For Creative Minds" in the back matter. This section has four pages of interactive activities to reinforce learning. Examples include experiments with evaporation, a cloud match exercise, and information about how clouds are connected to weather prediction.

Because evaporation is the source of water that ends up in clouds, let's try some evaporation experiments of our own.

Water Evaporation

Evaporation is a chemical process that involves a change of state from liquid to gas.

1. Observation opportunity for youngest scientists

To study evaporation, you will need water, sponges or paint brushes, and a sidewalk or other flat surface on a sunny, hot day. Simply paint the water onto a flat surface and watch it evaporate. Try different surfaces, different amounts of water, different patterns of application, etc. Use sidewalk chalk to draw around a large wet patch and then revisit the site to emphasize how the wet area has been reduced over time.

If the children ask, explain that the liquid water is turning into a gas or vapor as it disappears and is rising up into the air.

2. Simple evaporation experiment for young scientists

Can you prevent evaporation with plastic wrap?

Gather:

  • Water
  • Measuring cup
  • Plastic wrap
  • Timing device (optional)
  • Level, flat, hard surface like sidewalk or driveway
  • Rocks to hold down plastic wrap (optional)

Create two similar-sized and similar-shaped wet areas by pouring a measured amount of water onto a flat, level surface (1/4 cup of water works well). Note:  If the surface is sloped, the water will tend to roll off and form irregular shapes.

Cover one of the spots with plastic wrap and hold down with rocks, if necessary.

evap-expt-beforeWait a few minutes (time will vary with temperature, sunlight, and humidity).

Return and assess which spot has evaporated the most.

evap-expt-after-3Why?

3. Evaporation challenge for middle-grade scientists

Gather:

  • Shallow plates or bowls
  • Bottles or jars, preferably with narrow necks
  • Measuring cup(s)
  • Timing device(s)
  • Thermometer(s)
  • Cotton balls or tissues
  • Markers
  • Paper
  • Scales to weigh bowls and jars

Challenge the children to come up with questions about evaporation and then generate a hypothesis. Using the materials provided, design and carry out an experiment to test their hypothesis.

Some suggestions:

  • Measure the rate of evaporation of 1/4 cup of water in a shallow plate or bowl versus in a narrow-necked jar (For example:  weigh the bowls and jars with water before and after evaporation).
  • Measure the rate of evaporation in a shallow dish in the sun versus in a shady location (mark the levels before and after evaporation with a marker).
  • Measure the rate of evaporation of 1/4 cup of water open in a shallow dish versus 1/4 cup of water soaked into tissue or cotton balls in a shallow dish.
  • Take the temperature with the thermometer on a sunny surface. Then place a wet tissue or cotton ball over the base of the thermometer. How does the temperature change over time?

Discuss their results.

Older engineers will likely enjoy the evaporation-powered engine we discussed in the STEAM festival post about engineering.

 Further resources:

The book publisher, Arbordale Publishing, offers a number of resources, including a free 17 page Teaching Activities Guide to accompany Clouds (see right sidebar).

Weather-books-for-kidsWe have a growing list of weather-related children's books at Science Books for Kids.

Children interested in weather? They might enjoy this wind map of the U.S. How would the amount of wind effect evaporation?

___________________________

Disclosures: The book was from our local library. Also, I am an affiliate for Amazon. If you click through the linked titles or ads and make a purchase, I will receive a small commission at no extra charge to you. Proceeds will be used to maintain this self-hosted blog.

Come visit the STEM Friday blog each week to find more great Science, Technology, Engineering and Math books.

NASA image courtesy MODIS Rapid Response Team at NASA GSFC. Caption by Michon Scott.

Ever watched the weather report and wondered what it would be like to be a meteorologist? Here’s a fun way to learn about the weather and try out being weather scientist at the same time:  Dress up as a meteorologist and give a pretend weather report.

Gather:

  • a camcorder/video camera
  • poster paper and markers to make weather maps
  • local weather information
  • dress up clothes

Step 1. Do some research about meteorologists and what they do.

Did you know meteorologists stand in front of a green screen (called a chrome-a-key) and point to weather fronts by looking in a nearby monitor? The Weather Wiz Kids website has information about Becoming a Meteorologist.

2. Learn how to read a weather map and prepare a weather report. Kids Online Resource (KidsOLR) has a Meteorology page with tons of weather links to help with your research (this page does have Google ads at the top). You can use the weather words list below to get you started, too.

3. Make posters showing cold fronts, warm fronts, the current weather conditions, and the local weather forecast.

4. Dress up like you are going to be on television. Then have a friend or family member take a video of you presenting the weather.

Extension:  Some television stations have tours or information days. Check to see if you can visit one of your local meteorologists to learn more.

Weather Words:

  • air mass - air moving in large blocks
  • atmosphere - the blanket of air that encircles the earth. It is a mixture of gases, liquids and fine solids. Living things can also be found in the atmosphere, such as algae, bacteria and fungi. The atmosphere contains 78% nitrogen and 21 % oxygen.
  • blizzard - heavy snow with high winds, 35 mph or faster
  • cloud classification -clouds are classified by shape and height and given names such as cumulus, cirrus, stratus, etc.
  • condensation - process of water vapor changing into a liquid
  • dew point - temperature at which air becomes saturated with water vapor and condensation occurs (keep in mind that warm air holds more water vapor than cool air)
  • drizzle - fine precipitation with water droplet sizes smaller than rain
  • evaporation - changing liquids into vapor or gas at temperatures lower than the boiling point
  • flood - water levels rising above normal, often quickly
  • fog - technically a very low-lying cloud
  • fronts, cold front - cold air mass approaches warm air mass and lifts it
  • warm front - warm air meets cooler air and rises over it
  • hail, hailstones - chunks of ice produced by updrafts in thunderstorms
  • humidity - amount of water vapor in the air
  • hurricane -large-scale, violent wind and rain storm that forms in the Atlantic Ocean.
  • isobar - line drawn on a weather map to indicate points of equal air pressure
  • isotherm - line drawn on a map to connect points of equal temperature
  • jet stream-  a fast-moving river of air high in the atmosphere
  • lightning - huge electrical charge forming during storms
  • meteorologist - person who studies weather
  • monsoon - heavy rain resulting from a prevailing seasonal wind pattern
  • nimbus - dark clouds full of water vapor
  • precipitation - water falling from clouds
  • relative humidity - amount of water vapor in the air compared to the amount needed for saturation at that temperature
  • shower - brief period of precipitation
  • sleet - snow that melts in the air and then refreezes as pellets
  • snow - ice crystals that form in clouds and fall to earth
  • sun - the star that is at the center of our solar system
  • temperature - amount of hotness or coldness as measured by the kinetic energy of the atoms or molecules
  • thunder - lightning passing through air causes a shock wave heard as the loud noise called thunder
  • tornado - violently rotating column of air
  • typhoon - large-scale, violent wind and rain storm that forms in the Pacific Ocean
  • wind -moving air

If you like your video and upload it, be sure to send us a link.

Looking for more information about weather? See our growing list of weather children's books at Science Books for Kids.

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The weather has been in the news this weekend, so it might be a perfect time to build a weather station.

Background:

Because the weather changes from time to time and place to place, scientists use instruments to measure the weather conditions. They often group the instruments at one location, called a weather station. The scientists use the information they collect from many stations to make weather forecasts.

To make a weather station at home, consider the making or buying some of the following equipment:

  • Outdoor thermometer to measure temperature
  • Anemometer to measure wind speed
  • Wind or weather vane to record wind direction
  • Rain gauge to measure precipitation
  • Barometer to measure pressure
  • Hygrometer to measure amount of moisture in the air

Barometer

How to make an easy homemade barometer.

Thermometer

You may make a thermometer to see how one works, but you will probably need an outdoor thermometer to be able to take reliable readings outside.

Watch the video to see how to make a simple thermometer in this post about water and thermometers.

Water temperature science has more information about thermometers, too.

A Simple Weather Vane

Gather for each child:

  • A plastic drinking straw (body of vane) – straight, not the bendy kind
  • A pencil with a sturdy eraser (support the vane)
  • Index card, piece of file folder or heavy construction paper (for tail of vane)
  • Dressmakers pin
  • Scissors
  • Tape (optional)
  • Markers and/or crayons
  • Container about the size of a small flowerpot, or old flowerpot
  • Soil, pebbles or similar material to hold pencil upright in the container
  • Compass to find north, east, west and south, only one needed to share

Cut two slits across one end of the straw, about one inch long.

Make a decorative tail for the vane. Cut the index card or paper into a weather-related shape, such as a raindrop, a sun or a flat-bottomed cloud. Make it about two inches in length. Have the children color their decoration. Slip the midline of the tail into the slits in the straw. If it doesn’t fit tightly, add a bit of tape to keep it in place. If you plan to use it for an extended period outside, you might want to consider laminating the tail.

Fill the container at least part way with soil or pebbles. Place the pencil upright in the middle of the soil, with the eraser end up. Push into the soil until the pencil will stand up on it’s own, with the top eraser at least a few inches above the rim of the container. Add more soil as needed.

An adult will need to supervise this step for young children. Insert the dressmaker’s pin through the straw about two inches from the tail, in such a way that the fan is oriented up and down. The wind will be blowing from the side, so the tail should be positioned to catch the wind. Because the tail adds weight, the pin needs to be nearer the tail, rather than in the center, to balance. Once the pin is in place and oriented correctly, then push the pin into the top of the eraser. Blow on the weather vane to see if it can spin freely. If not, make the necessary corrections and try again.

To finish, take the weather vane outside where the wind might blow. Use the compass to determine the directions. Mark the container with north, south, east and west. Once the pot/container is marked, leave it in place. If it gets moved, be sure to correct the position with the compass. Record the wind direction as it changes over time.

Anemometer

You can easily modify the weather vane into an anemometer, which is a device to measure wind speed rather than direction. Or make another using the directions above.

Gather:

  • Weather vane and materials above
  • Large needle or sharp nail
  • Two pieces of cardboard about 1½ inches wide by about 18 inches long
  • Foil muffin tin liner cups, or bathroom-sized paper cups
  • Staples or tacks
  • Watch or timepiece with minute hand

Remove the pin/straw from the eraser, but leave the rest of the weather vane intact. Cross the two pieces of cardboard and mark the center. Cut a slit half way through the middle of each, turn one over and then slide the two pieces together. They should overlap and form an X-shape.

If you are using paper cups, cut the rims off to reduce the weight. Staple or tack the muffin cups or small paper cups to the ends of each strip of cardboard, so they are all facing the same direction, for example in a clockwise direction. These are the cups that will catch the wind and be pushed around. Chose one arm and color the cardboard with a marker. This will help you count how fast the anemometer is revolving.

An adult will need to help with this step. Take the needle or sharp nail and drive it through the center of the cardboard X in such a way that the cups will rotate around from side to side. Once the needle through, push the point into the pencil eraser as before. Blow on the muffin cups and see if they will spin. Adjust accordingly. You may have to replace the needle if it is too short, or trim up the cardboard arms. Add staples if it is out of balance. Make the hole in the center larger, if it is too tight.

Take the anemometer outside. Place on a table or other structure, so it isn’t on the ground. Count how many times the colored arm passes per minute as a measure of wind speed.

Rain Gauge

The Miami Museum of Science has easy steps for how to make a rain gauge, complete with a rain gauge ruler to print out.

Take your equipment outside at least once a day. Record the results. Check with local forecasts to see if your results match theirs. Note:  Often the official weather station is in a shed or box to prevent the equipment from being exposed to direct sunlight. How might that make their results differ from yours?

(Note: this activity has been posted on the Growing With Science website, but since I am making some modifications to the website soon, I decided to revise it and post here).

Looking for children's books? Try our growing list of weather books at Science Books for Kids.

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