Vocabulary for Astronomy Domain 6

gas Sentence: The sun is an enormous ball of hot gas. Definition: A gas, unlike a solid or a liquid, is a thin, sometimes invisible, substance through which objects can pass. Sentence: The sun is an enormous ball of hot gas.

horizon Definition: The horizon is the line in the distance where it looks like the land or a body of water meets the sky. Sentence: In the read-aloud you heard, “Each morning at dawn, the sun appears on the horizon in the eastern sky.”

dusk Definition: Dusk is the time of day just after sunset, when the sky is not as dark as it will be. Sentence: This man is skiing at dusk. There is still a little bit of light, but it’s getting dark.

Definition: Very, very old or long, long ago ancient Definition: Very, very old or long, long ago Sentence: In ancient times, Egyptians built the pyramids.

Definition: The way someone or something looks. appearance Definition: The way someone or something looks. Sentence: In the read-aloud you heard, “The appearance of the moon changes depending on where it is in its orbit.”

launch Definition: Launch means to lift or push an object with force, or hard. Sentence: Many people watch the space shuttle launch into the air.

Definition: committed to something; don’t want to give up determined Definition: committed to something; don’t want to give up “President Kennedy and the NASA scientists were determined to succeed at sending astronauts to the moon.

abundant Sentence: Our planet Earth has an abundant amount of water. Definition: more than enough Sentence: Our planet Earth has an abundant amount of water.

Definition: Sort or put into a group with other similar objects categorize Definition: Sort or put into a group with other similar objects Sentence: My teacher asked me to categorize this stack of books as fiction or nonfiction for our classroom library.