VanCleave's Science Fun

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

  • Home
  • ASK JANICE
  • Teacher Guide
  • Homeschool Science For Kids

Types of Variables

By Janice VanCleave

Experimental Science Project Tests the Affect of Humidity on the Shelf-Life of Onions

  What are the Different Types of Experimental Variables? Variables are anything in an experiment that can change on its own or can be changed. Types of experimental variables are: independent variables, dependent variables, controlled variables. Independent Variable (IV) An independent variable is a variable that is purposely changed. The purpose of an experiment is […]

Filed Under: Science Projects Tagged With: controlled, dependent, independent, onions, shelf life, variables

Growing Rock Candy: Variables

By Janice VanCleave

Experiment for Growing Sugar Crystals Variables Dependent Variable: amount of sugar crystals collected Independent Variable: The independent variable is a part of the experiment that if changed could affect the dependent variable.I have identified all the possible independent variables in the following descriptive experiment. Notice that instead of just making a list of the variables, […]

Filed Under: Science Projects, variables Tagged With: sugar crystals, variables

Variables For Making Rock Candy

By Janice VanCleave

A Science Fair Project is a cause/effect investigation. The cause is called an independent variable (something you purposely change). Changes in the independent variable affects another variable called the dependent variable. You AFFECT the investigation by making changes in the independent variable. The objective of the investigation is to measure the EFFECT that this change […]

Filed Under: Science Projects Tagged With: chemistry project, rock candy, science fair project, variables

Crystal Project: Variables

By Janice VanCleave

Halie Crystal

A variable is something that can change. For your science fair project, you should change one variable to see what affect it has on another variable. These two variables are: independent variable: Something that you choose to change. dependent variable: Something that changes in response to changes in the independent variable. 1. Following are ideas […]

Filed Under: Science Projects Tagged With: dependent variable, independent variable, variables

DNA: Project Variables

By Janice VanCleave

DNA Molecule

Step 3: Variables (things that can change) Variable is the name given for any part of an experiment that changes. For example, the following question identifies what is happening as well several variables which are identified. Note: The Question is an example for identifying variables–but is in the form of writing a science fair project […]

Filed Under: Science Projects Tagged With: variables

Transpiration

By Janice VanCleave

Janice VanCleave describes a fun transpiration investigation with ideas for further investigations. Good ideas for science fair projects.

Filed Under: Biology, Science Projects Tagged With: science fair project tips, transpiration, variables

  • « Previous Page
  • 1
  • 2

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.....

Copyright © 2025 · Janice Van Cleave · JVC's Science Fair Projects · Log in