Ask Mr. Science

 
 

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straight to the keyword index
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   Intro
During the 1996-97 school year, I spent an hour every week in Linda Waidler's 3rd-4th grade class at Wood-Gormley Elementary (randomly chosen because my daughter was in it), answering any science question the children might have. For the 97-98 year, I did the same in Shirley Esquibel's 3rd-grade class (by coincidence, my son was in that class). the next year, I did the science hour in Katie Irving's 6th-grade class, and so on. Even though my kids have moved up and on, I still go to WG. I found that in middle and high school, you can do this a few times a year, but you cannot steal an hour a week from a science teacher. Also, in a primary school class you reach all kids, not just the ones in science class.

Here I have a growing number of pages with these questions, and elaborate on some demonstrations I came up with to explain some of the concepts. In addition, I usually find a bunch of web links on the subject, so that children (parents, teachers) can do a bit more reading and learning.

I keep these pages for different audiences:

  • For the children, so can read over some subjects again, and follow the links I found to get more background info, and pictures.
  • For the parents, so they can see what goes on in class during the science hour.
  • For fellow science teachers, that may run across them and might find them useful
  • Having done this for a few years now, these pages are a handy archive for myself. I can quickly look up what I need for a demo.
I'd like to hear from all. Don't be shy. What is special is that I am a scientist, not a teacher, and I do not have a lot of equipment (and neither does the school). The demonstrations therefore use simple materials I find in my kitchen, shop and yard. This is mostly no-tech science, but you'd be surprised what you can do with cardboard, duct tape and paper clips.

I typically update these pages every week during the schoolyear, as questions come in, and rework older paragraphs. These pages are in constant flux, as is everything on the web, of course



There is also a keyword index further down.

Chronological Index:
on page 1
  • What fruit has the most seeds?
  • Does everything have a name?
  • How do rockets fly?
  • Why is the sky blue?
  • on page 2:
  • Comets
  • Sound
  • Solar and lunar eclipses
  • Where do all the animals come from?
  • on page 3:
  • Black holes
  • Electricity and magnetism
  • The aurora borealis
  • on page 4:
  • Sunspots
  • Weather, fog in a bottle
  • Static electricity
  • How do TV's work?
  • How can ants carry 20 times their weight?
  • on page 5:
  • Plate tectonics
  • Margins of error
  • How many stars are there?
  • Why do people live longer?
  • on page 6:
  • The ozone hole
  • Global warming
  • Cloud chamber
  • Meteorites
  • on page 7:
  • Why does ice float?
  • How much does air weigh?
  • Why do dogs have fur?
  • If you sent a balloon to the bottom
       of the ocean, how come it will shrink?
  • on page 8:
  • How does the eye work?
  • How do clouds form?
  • How are you able to hear other people's voices?
  • When will we run out of water?
  • How to measure the speed of sound
  • on page 9:
  • Lenses and simple optics
  • Waves and interference
  • What is AM and FM?
  • on page 10:
  • What is gravity?
  • Why do we see mirages?
  • If the universe is not infinite,
    what will happen when you come to the end?
  • on page 11:
  • Why are leaves green?
  • The transit of Mercury
  • Why do we cry?
  • Y2K, and some computer history
  • what causes earthquakes?
  • on page 12:
  • Insects
  • How do batteries work?
  • Why is ice slippery?
  • How does a pendulum work?
  • on page 13:
  • Car brakes
  • Measure the wavelength of your laser pointer
  • What animals will outlive humans?
  • on page 14:
  • On building (bridges mostly)
  • Evaporation of solutions
  • on page 15:
  • Fibonacci numbers
  • About clouds
  • The shape of raindrops
  • About TV's and computer monitors
  • on page 16:
  • Making web pages
  • More stars than grains of sand?
  • Rainbows
  • on page 17:
  • Why do wheels seem to turn backwards
  • How does the sun shine?
  • Why don't we all have purple skin?
  • on page 18:
  • The birds in the truck
  • Fly in the car
  • How much does the earth weigh?
  • on page 19:
  • Helium and funny voices
  • Why do stars twinkle
  • Making a lens out of air
  • on page 20:
  • Making a wooden cyclotron
  • Why do you get carsick?
  • Static Electricity
  • on page 21:
  • Hurricanes and tornadoes
  • How does the VLA work
  • Where do all the animals come from
  • on page 22:
  • Tigers, narwhals, giand squids and amur leopards
  • The size of everything
  • Saint Nicholas
  • Genetics
  • on page 23:
  • What are people made of
  • UFOs and aliens
  • Quarks
  • on page 24:
  • Will Pluto and Neptune ever crash?
  • Why do we have leap years?
  • Fun with liquid Nitrogen
  • on page 25:
  • The Periodic Table of the elements
  • How do computers work?
  • on last page:
  • unanswered questions
  • other web sites like this one




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    Keyword index
    A B C D E F G H I J K L M N
    O P Q R S T U V W X Y Z
    A aerogel
    age (life expectancy)
    air (air lens)
    air (mirages)
    air pressure
    air pressure
    air, weighing
    aliens and UFOs
    AM
    animals (evolution)
    animals (outlive humans)
    ants, strenght of
    aquifer
    arch, free-standing
    astronomy (black holes)
    atmosphere (aurora borealis)
    atmosphere (global warming)
    atmosphere (pressure)
    atmosphere (ozone hole)
    aurora borealis, australis
    B balance, sensitive
    balance - inner ear
    balloon
    batteries
    batteries
    birds in the truck
    black holes
    blue sky
    body, composition of
    bugs
    buoyancy
    C carsick car with a fly inside
    chemistry, organic
    chlorophill
    clocks (pendulum)
    clouds
    coldblooded
    color (blue sky)
    color of leaves
    colors (soap bubbles)
    color vision
    comets
    comet (meteorites)
    composition of the body
    computers, Y2K
    computer, how do they work
    conservation (water)
    cosmology (how many stars)
    crying
    cyclotron, wooden
    D density of air
    density (floating)
    dinosaurs
    DNA and Genetics
    dogs
    drinking water
    E ear (air pressure)
    earth (orbital inclination)
    earth (plate tectonics)
    earth, round
    earth, weight of
    earthquakes
    electricity
    electricity (batteries)
    electricity, static
    elemental composition of the body
    elements, periodic table of
    end of the world
    eclipse, solar, lunar
    estimating large numbers
    error, margins of
    eustachian tubes
    evolution
    eyes
    F Fibonacci numbers
    floating
    FM
    fly in a car
    focal length
    fog
    fog
    fruit
    fur
    fusion, nuclear
    G gases, weighing
    generator, electrical
    genetics
    gigantothermy
    global warming
    golden ratio
    grammophone
    gratings
    green leaves
    groundwater
    gravity (black holes)
    gravity (what is)
    H hale-bopp
    hayakutake
    health (life expectancy)
    hearing
    hearing
    holes, black
    holograms
    hurricanes and tornadoes
    I ice (floating)
    ice (slippery)
    infinity
    insects
    insects, strenght of
    insects (outlive humans)
    interference
    iris
    J  
    K  
    L language
    laser pointer (wavelenght of)
    leap years
    leaves
    lens (of the eye)
    lenses
    lens, making one out of air
    leopard, amur
    life expectancy
    light (mirages)
    light rays
    light scattering
    liquid nitrogen
    liquid oxygen
    lunar eclipses
    M mach-1
    magnetic north
    magnetic deviation
    magnetism
    magnet, falling
    margins of error
    Mercury
    meteorites
    mirages
    modulation (AM,FM)
    momentum
    moon, phases of
    moon stone
    N names
    narwhals
    neptune, collision with pluto
    nitrogen, liquid
    north pole
    nuclear fusion
    O optics
    orbits (gravity
    oxygen, liquid
    ozone hole
    P pantograph
    pendulum
    penumbra
    periodic table of the elements
    phases of the moon, venus
    photosynthesis
    planet Mercury
    plants (colored leaves)
    plate tectonics
    plate tectonics
    pluto, collision with Neptune
    pole, north
    pollution (global warming)
    pollution (ozone hole)
    pressure (air, water, ear)
    Q quarks
    questions, unanswered
    R rainbows
    raindrop shapes
    radio (AM,FM)
    rayleigh scattering
    records, 78 rpm
    reflection (mirages)
    refraction (mirages)
    refraction - rainbows
    retina
    rockets
    roman numerals
    rotation of the sun
    S Saint Nicholas, Sinterklaas
    sand: are there more grains of sand than stars?
    scattering light
    seeds
    shower, meteor
    shrimp eyes
    size of everything
    size scaling
    sky
    skin color
    slinky (waves)
    soap films
    solar eclipses
    solar wind
    sound
    sound
    sound, speed of
    space (aurora borealis)
    space (gravity)
    spacetime model (black holes)
    sparks (static electricity)
    speed of sound
    squid, giant
    stars, how many are there
    stars, why do they twinkle
    static electricity
    strobe light effects
    sun (sunspots)
    sun, how does it shine
    sunspots
    T tears
    tectonics, plate
    tectonics
    telescope, making
    telescope (sunspots)
    tiger stripes
    tornadoes and hurricanes
    transit of Mercury
    triangulation
    truck with birds
    true north
    turntable
    TV
    U UFOs and aliens
    umbra
    UV (ozone hole)
    unanswered questions
    universe
    universe (how many stars)
    V venus, phases of
    vision
    VLA, how does it work
    volcanos (plate tectonics)
    volcanos (earthquakes)
    W wagon whell optical illusion
    warmblooded
    water (condensing)
    warming, global
    water, drinking
    water pressure
    water rockets
    wavelenght (blue sky)
    wavelength (of laser pointer)
    waves (AM,FM)
    waves, interference
    waves, refraction
    waves (sound)
    waves, speed of sound
    waves (sound)
    weighing the air
    weight of the earth
    weather
    weather
    web sites like this one
    wimshurst machine
    words
    Y yodeling
    Y2K
    Z  








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    Last update Dec 2007 - HvH
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