In many time-travel stories, this is the word for a person who journeys to the past or future.
time traveler
This is the answer you get when you add numbers together.
Sum
This is the star at the center of our solar system that gives Earth light and heat.
Sun
This man was the first President of the United States.
George Washington
These are the three colors that cannot be made by mixing other colors: red, blue, and yellow
primary colors
This punctuation mark is used when a character in a time-travel story asks a question like “What year is it?”
What is a question mark?
This shape with three sides could be drawn by a time traveler to mark a triangular time portal.
triangle
Plants use this process to make food from sunlight — something that stays the same no matter what year a time traveler visits.
photosynthesis
A time traveler to 1776 might see the signing of this important paper that declared the colonies free.
Declaration of Independence
This word describes how light or dark a color is in a painting of a futuristic time machine.
value
This is the person who writes a time-travel book or story.
When you multiply the number of years a time traveler jumps by 2, the answer is called this.
product
This invisible force pulls everything toward Earth and would still work on a time traveler in any year.
gravity
A time traveler to 1620 might meet these people who sailed on the Mayflower.
Pilgrims
This artist painted swirling skies and sunflowers and might inspire a time-travel painting with wild colors.
Vincent van Gogh
This type of word describes a noun, like calling a time machine “shiny” or “ancient.”
adjective
This shows a part of a whole, like saying a time traveler spent 3/4 of the day in the past.
fraction
These remains of ancient plants and animals help scientists (and time travelers) learn about life long ago.
fossils
A time traveler helping people escape slavery in the 1800s might meet this brave conductor of the Underground Railroad.
Harriet Tubman
This is the way an artist arranges lines, shapes, and colors in a picture of a time portal.
composition
In a time-travel story, this is the main person or character the adventure follows.
main character/protagonist
This is the total distance around the outside of a time machine shaped like a rectangle or circle.
perimeter
This layer of gases around Earth protects living things and would surround a time traveler in any era.
atmosphere
A time traveler to the 1860s would find the United States fighting this war between North and South.
civil war
This Italian artist painted the Mona Lisa and sketched flying machines that look like early ideas for time-travel inventions.
Leonardo da Vinci