Glossary
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🚧 UNDER CONSTRUCTION When users encounter an unfamiliar word, they have access to on-demand audio and text support—a pop-up window with the glossary entry.
gallon
A unit for measuring liquids. One gallon equals four quarts. If you run the shower for one minute, you use about five gallons of water.
grooming
taking care of an animal’s appearance by brushing, bathing, shampooing, trimming fur, and cutting nails.
hexagon
A closed shape with six straight sides. Hexagons fit tightly together to cover a space without any gaps.
hundred
One hundred is ten tens. It is written as 1 followed by two zeroes: 100. One hundred pennies are worth one dollar.
infographic
A visual representation of information. Infographics use images, icons, text, and charts to convey messages at a glance.
icon
A small picture that represents an idea or action. Paper and plastic with this icon ♺ can be recycled and reused.
line graph
A graph that shows data over time. The data points in a line graph are connected by line segments.
increase
(verb) To grow in size or number
liter
A unit for measuring liquids in the metric system. One liter is slightly more than one quart.
mature
(adjective) Fully grown. It takes more than ten years for an apple tree to become a mature tree.
mental math
Solving math problems in your head without a calculator or paper and pencil
meter
A unit for measuring length in the metric system. One meter is around 39 inches, or slightly more than three feet.
million
A million is one thousand thousands. It is written as 1 followed by six zeroes: 1,000,000. Nearly four million people live in Chicago, Illinois.
myth
A story from long ago that explained things in the natural world or taught life lessons. Often includes characters with fabulous powers.
network
A group of things that are connected and work together as one system
outlier
A data point or number that is very different from the others in a data set
oxygen
A colorless gas found in the air that humans need to breathe. Oxygen is one of the main ingredients of water.