3.4 Fluency

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

• investigator

• astronomer

• archaeologist

• paleontologist

an arrangement of stars as seen from earth

• the sun

• constellation

• rotation

• astronomer

information that supports an answer to a question

• evidence

• observation

• data

• experiment

an attempt to find out about something.

• evidence

• investigation

• data

• astronomer

to move in a regular path around something

• rotation

• planet

• star

• orbit

something we observe to be similar over and over again

• data

• investigation

• pattern

• evidence

a huge object in space that gives off heat and light

• star

• planet

• comet

• asteroid

The length of time it takes for Earth to orbit the sun once

• day

• month

• year

• decade