Exploring Vocabulary in Science

What is the term for the distance from the center of a circle to its edge?

• Diameter

• Radius

• Orbit

• Sphere

Which word describes a perfectly round three-dimensional object, like a ball?

• Sphere

• Orbit

• Calculation

• Criteria

What is the name for the path an object takes as it moves around another object in space?

• Calculation

• Orbit

• Diameter

• Astrobiologist

Which word means "the length of a straight line passing through the center of a circle, connecting two points on the edge"?

• Radius

• Diameter

• Sphere

• Criteria

What do you call a person who studies the possibility of life beyond Earth?

• Astronomical

• Astrobiologist

• Calculation

• Criteria

Which word means "about, but not exactly"?

• Exactly

• Approximately

• Calculation

• Criteria

If you know the radius of a circle is 5 cm, what is the diameter?

• 5 cm

• 10 cm

• 15 cm

• 25 cm

Which of the following is an example of an astronomical object?

• A soccer ball

• The Moon

• A pencil

• A book

If a planet orbits the Sun, what is the Sun in this situation?

• The object being orbited

• The object doing the orbiting

• The calculation

• The criteria

Which of the following best describes a calculation?

• A round object

• A set of rules

• A math process to find an answer

• A path in space