Space Ch 2 and 3

a scientist who studies stars, planets, and other objects in the universe

• astronaut

• astronomer

• autobiographer

• atom

an arrangement of stars as seen from Earth

• pattern

• star

• constellation

• nightime

observations or measurements recorded in an investigation

• data

• evidence

• explanation

• investigation

a period of time that is 24 hours long and includes daytime and nighttime

• nighttime

• Earth

• pattern

• day

the planet we live on in our solar system

• Earth

• planet

• solar system

• sun

information that supports an answer to a question

• investigation

• data

• evidence

• information

a description of how something works or why something happens

• evidence

• investigation

• explanation

• data

the pull between Earth and other objects, which acts even without touching

• force

• pull

• Earth

• gravity

an attempt to find out about something

• explanation

• investigation

• information

• data

something scientists make to answer questions about the real world

• explanation

• data

• investigation

• model