VanCleave's Science Fun

Your Guide to Science Projects, Fun Experiments, and Science Research

ABOUT THE SOUND PICTURE

With mouth wide open, vibrating air coming up the throat from the vocal chords leaving the open mouth and spreading in all directions. Hi, I am Janice VanCleave, author of 50+ best-selling science experiment books for children ages 4 through high school. I taught science for 27 years and now am creating this science website.   My scream was not staged. The picture was to be of two adult cats, which I was holding. A microsecond before the camera snapped, the two cats dug their claws into my skin as they prepared to leap out of my arms. A picture like this is great for making inferences. Kids could make "guesses" as to why I am screaming. They would be drawing on facts from the photo, such as I look like I am in pain or maybe I am just pretending.

Sound Supplies and Sound Investigations

Educational Innovation Sound Supplies A black and yellow logo for Educational Innovations. A place to find fun science supplies.
  • Home
  • ASK JANICE
  • Teacher Guide
  • Homeschool Science For Kids

Changing Density Units

By Janice VanCleave

Density is a type of conversion factor that compares the mass of a specific volume. The basic metric unit for mass is gram, g.The basic metric unit for length is meter, m.The basic metric unit for volume is L or m 3. Use the density of calcium, Ca, found at Dynamic Periodic TableConvert the units of […]

Filed Under: Chemistry Tagged With: conversion factor, density

How Many Atoms in A Mole?

By Janice VanCleave

A drawing of a mole is shown to clarify that in chemistry a mole is not an animal.

A chemical mole is not an animal.  A chemical mole is a unit of measuring the amount of chemical substances. For the problem shown, use this mole conversion factor: 1 mole = 6.o2 x 10 23 atoms The number 6.o2 x 10 23 is called Avagadro’s Number  Calculate:  4.2 x 10 26 atoms of lithium (Li) are equal to how many […]

Filed Under: Chemistry Tagged With: atom, conversion factor, dimensional analysis, moles

What is a Mole?

By Janice VanCleave

A mole is a chemical unit of measure. Dimensional analysis is a method used to convert one  unit of measurement to another. Conversion factors are mathematical tools for converting between units of measurement. The conversion factor 1 ft = 12 inches is used to convert units of feet to units of inches or vise versa. Example: How many […]

Filed Under: Chemistry Tagged With: Avogadro's number, conversion factor, dimensional analysis, mole

Salt Flats

By Janice VanCleave

Salt flats are usually flat, as their name implies. One salt flat that doesn’t adhere to this description is “The Devil’s Golf Course” in Death Valley National Park.  This salt flat  was once a lake. As the water evaporated, the minerals that were dissolved in the lake water were left behind. Since the surface remains […]

Filed Under: Earth Science Tagged With: conversion factor

Topic Search

Visitors From All Over the World


Welcome to Janice’s Science Extravaganza!

The spoon hanging from the string vibrates when struck and these vibrations are transmitted through the string and the sound is amplified by the plastic cups. ABOUT ME: Hi, I am Janice VanCleave, author of 50 best-selling science experiment books for children ages 4 through high school. I taught science for 27 years. MORE.....

Introductory CAT Lesson

Science CAT Activity and SCI/Art  

SOON! More CAT Activities

Janice VanCleave CAT Stickers

Order Your CAT Stickers Here

FAQs

Janice VanCleave answers your questions about all the different kinds of color changing products.

Check here for Frequently Asked Questions about CAT
stickers.

Send Questions to Janice

Send Information to me using this form.

Contact Janice

Other Janice VanCleave Free Color Changing Lessons

  • HAT Stickers Heat Activated Thermochromic Stickers Stickers that change colors when heated.
  • SA Stickers Sun Activated Stickers Stickers that change color when exposed to sunlight.
  • TLC Dot Stickers Thermochromic Liquid Crystal Stickers Stickers that, like Mood Rings, change color when heated.

Copyright © 2026 · Janice Van Cleave · JVC's Science Fair Projects · Log in