stargazing across time m1
1. humans and the night sky
for thousands of years, people all over the world have looked up at the night sky with curiosity and wonder. they noticed patterns among the stars and connected them into shapes and pictures called constellations. ancient civilizations used these star patterns to navigate, tell time, and track the seasons. over time, human curiosity led to new inventions and discoveries that helped us study the universe in greater detail.
question 1 (ccss ri.7.2 – main idea):
what is the main idea of this section?
a) constellations were only used for decoration.
b) people have always been curious about the stars and developed tools to study them.
c) ancient people had no understanding of the sky.
d) the stars have changed their positions over time.

2. early tools for measuring time
before modern clocks existed, people used simple tools to measure time. one of the first was the sundial, which uses the suns shadow to tell the hour of the day. travelers in the 1600s even carried small, portable sundials. some ancient tools, like star dials, could also tell time by using bright constellations such as the big dipper.
question 2 (ngss practice: developing and using models):
what do sundials and star dials have in common?
a) they both use light from space to measure time.
b) they only work when it rains.
c) they were used to measure distance, not time.
d) they could only be used by scientists.

Question

stargazing across time m1
1. humans and the night sky
for thousands of years, people all over the world have looked up at the night sky with curiosity and wonder. they noticed patterns among the stars and connected them into shapes and pictures called constellations. ancient civilizations used these star patterns to navigate, tell time, and track the seasons. over time, human curiosity led to new inventions and discoveries that helped us study the universe in greater detail.
question 1 (ccss ri.7.2 – main idea):
what is the main idea of this section?
a) constellations were only used for decoration.
b) people have always been curious about the stars and developed tools to study them.
c) ancient people had no understanding of the sky.
d) the stars have changed their positions over time.

2. early tools for measuring time
before modern clocks existed, people used simple tools to measure time. one of the first was the sundial, which uses the suns shadow to tell the hour of the day. travelers in the 1600s even carried small, portable sundials. some ancient tools, like star dials, could also tell time by using bright constellations such as the big dipper.
question 2 (ngss practice: developing and using models):
what do sundials and star dials have in common?
a) they both use light from space to measure time.
b) they only work when it rains.
c) they were used to measure distance, not time.
d) they could only be used by scientists.

Accepted Answer

# Brief Explanations:
Question 1: The section states people have been curious about stars for thousands of years, formed constellations, used them for practical purposes, and developed tools to study the universe. Option B aligns with this main idea.
Question 2: The text notes sundials use the Sun’s shadow (solar light from space) and star dials use bright constellations (stellar light from space) to measure time. Option A correctly identifies this commonality.

# Answer:
1. B) People have always been curious about the stars and developed tools to study them.
2. A) They both use light from space to measure time.

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