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Chapter 2

QuestionAnswer
Constellation an arrangement of stars as seen from Earth.
Pattern something we observe to be similar over and over again. Identifying patterns often leads scientists to ask questions and to plan investigations about what might be causing the pattern.
Systematic careful and orderly
Day the period of time it takes for the Earth to complete one full rotation on its axis, which is approximately 24 hours.
Gravity the pull between Earth and other objects, and it acts even without touching. Because of gravity, this desk is pulled down to the floor. Earth pulls all objects down toward Earth with the force of gravity.
Sphere round, three-dimensional shape where every point on the surface is the same distance from the center. The Earth is a sphere because it is shaped like a ball, with no edges or corners.
Up always away from the ground, anywhere on Earth.
Down always the same for everyone anywhere on Earth—down is toward the ground.
Daytime This side of the Earth is facing the Sun.
Nighttime This side of the Earth is facing away from the Sun.
Created by: user-1963819
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