Observing Daylight Through Seasons — Make observations of daylight at different times of year (or use records). - 1st Grade Science

SECTION 1

Why Do People Watch the Sun?

A long, long time ago, people looked up at the sky every day. They noticed that the Sun did not always act the same way. In summer, the Sun stayed up for a long time. In winter, it got dark early! People wanted to know why.

Farmers needed to know how much daylight they would get. Daylight is the time when the Sun is up and it is light outside. More daylight meant more time to grow food!

Long Ago • Ancient People Watch the Sky

People all over the world noticed the Sun rises and sets at different times during the year. They drew pictures of the Sun on rocks!

Hundreds of Years Ago • Farmers Track Daylight

Farmers kept track of when the Sun came up and went down. This helped them know when to plant seeds and when to pick crops.

About 100 Years Ago • Scientists Make Charts

Scientists began writing down sunrise and sunset times every day. They made charts and records so everyone could see the patterns.

Today • We Use Records and Tools

Now we can look at records, calendars, and even apps to see how much daylight we get each day. You can observe it too!

Today we are going to be daylight detectives! We will look at patterns in how much sunlight we get in different seasons. A pattern is something that happens the same way again and again.

SECTION 2

Big Ideas About Daylight and Seasons

There are some important ideas to learn before we start observing daylight. Let's look at the big ideas together!

Daylight Changes

The amount of daylight is not the same every day. Some days have more sunlight. Some days have less. This change follows a pattern.

Four Seasons

A year has four seasons: spring, summer, fall, and winter. Each season has a different amount of daylight.

Summer Has the Most Light

In summer, we get the most hours of daylight. The Sun comes up early and goes down late.

Winter Has the Least Light

In winter, we get the fewest hours of daylight. The Sun comes up late and goes down early.

We Can Observe and Record

We can observe (watch and notice) daylight. We can also use records that other people made.

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KEY TAKEAWAY

Think of daylight like a bathtub filling with water. In summer, the bathtub fills up really high — that means lots and lots of sunlight! In winter, only a little water goes in — that means less sunlight. Spring and fall are right in the middle. This happens the same way every year, over and over again. That is a pattern!

SECTION 3

See the Daylight Pattern

Let's look at a picture that shows how daylight changes through the four seasons. The yellow part shows when the Sun is up. The dark blue part shows nighttime.

This diagram shows four seasons side by side. Look at how the yellow Sun area gets bigger in summer and smaller in winter. The number inside each Sun tells you how many hours of daylight that season gets.

Do you see the pattern? Winter has the smallest yellow area. Then spring gets bigger. Summer has the biggest yellow area of all! Then fall gets smaller again. This happens every single year.

SECTION 4

How Daylight Changes — Counting Hours

We can count how many hours of daylight we get each day. We look at when the Sun comes up — that is called sunrise. Then we look at when the Sun goes down — that is called sunset. The time between sunrise and sunset is our daylight!

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How to Count Daylight Hours

If the Sun comes up at 7 in the morning and goes down at 5 in the evening, we count the hours in between. That is 10 hours of daylight! In summer, the Sun might be up from 6 in the morning until 9 at night — that is about 15 hours!

Season	Sun Comes Up	Sun Goes Down	Daylight Hours
Winter	About 7:30 AM	About 4:30 PM	About 9 hours
Spring	About 6:30 AM	About 6:30 PM	About 12 hours
Summer	About 5:30 AM	About 8:30 PM	About 15 hours
Fall	About 6:30 AM	About 6:30 PM	About 12 hours

Approximate sunrise and sunset times for a city in the northern United States

Look at the table above! Summer has the most daylight hours — about 15 hours. Winter has the fewest — only about 9 hours. Spring and fall are in the middle with about 12 hours each.

SECTION 5

A Closer Look at Each Season

Let's look at a picture that shows what the Sun does in the sky during each season. In summer, the Sun goes up really high. In winter, it stays low. This changes how much light we get!

This diagram shows the Sun's path across the sky. The yellow arc is the summer path — it is tall and wide, so the Sun is up for a long time. The blue arc is the winter path — it is short and narrow, so the Sun is up for less time.

When the Sun takes a tall, wide path across the sky, it is up for many hours. That gives us a long, sunny day! When the Sun takes a short, low path, it is up for fewer hours. That gives us a short day with more nighttime.

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Fun Fact!

The longest day of the year is in summer. It is called the summer solstice. The shortest day is in winter. It is called the winter solstice. Solstice is a big word that means the Sun stops getting higher or lower!

SECTION 6

Let's Figure Out Daylight Together!

Imagine you are keeping a daylight record. Your teacher gave you the sunrise and sunset times for a day in June and a day in December. Let's find out which day has more daylight!

Comparing a Summer Day and a Winter Day

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Step 1 — Read the Records

The record says: On June 21, the Sun came up at 6:00 AM and went down at 9:00 PM. On December 21, the Sun came up at 7:00 AM and went down at 5:00 PM.
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Step 2 — Count the Summer Hours

From 6:00 AM to 9:00 PM, let's count on our fingers: 6, 7, 8, 9, 10, 11, 12, 1, 2, 3, 4, 5, 6, 7, 8, 9. That is 15 hours of daylight!

June 21 → 15 hours of daylight
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Step 3 — Count the Winter Hours

From 7:00 AM to 5:00 PM, let's count: 7, 8, 9, 10, 11, 12, 1, 2, 3, 4, 5. That is 10 hours of daylight.

December 21 → 10 hours of daylight
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Step 4 — Compare!

15 hours is more than 10 hours. So the summer day has 5 more hours of daylight than the winter day! That is a big difference.

Summer has MORE daylight than winter!

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GREAT JOB!

You just used records to compare daylight, just like a real scientist! Scientists look at records and data to find patterns. You found the pattern: summer days are longer than winter days.

SECTION 7

Ways to Observe Daylight

There are different ways you can observe and record daylight. Some ways you can do by yourself. Other ways use records that someone else already made. Both ways are great for finding patterns!

Method	What You Do	Good Things About It
Look Outside	Notice when it is light and dark outside at different times.	Easy to do! You just use your eyes.
Draw Pictures	Draw the sky in the morning and evening each month.	Fun and creative! You can see changes over time.
Use a Chart	Write down sunrise and sunset times on a chart each week.	You can compare numbers and see the pattern clearly.
Use Records	Look at sunrise and sunset data from books or websites.	You can see a whole year of data right away!

Four ways to observe and record daylight changes

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KEY TAKEAWAY

Recording daylight is like keeping a weather diary. Each time you write down what you see, you add another piece to the puzzle. After many days, you can look back and see the pattern — just like flipping through a flip-book and seeing a story!

SECTION 8

Connecting to Bigger Ideas

Right now, you are learning to observe and record how daylight changes. When you get older, you will learn why this happens! Here is a little peek at what is coming.

What You Know Now	What You'll Learn Later
Daylight changes with the seasons.	Earth is tilted, and that tilt causes the seasons.
Summer has more daylight than winter.	In summer, your part of Earth tilts toward the Sun.
The pattern repeats every year.	Earth goes around the Sun once every year, making the pattern.
We can use records to see the pattern.	Scientists use data and graphs to study patterns in nature.

Your learning journey — from observing to understanding!

For now, the most important thing is to be a good observer! Watch the sky. Notice when it gets light and when it gets dark. You are building the skills that real scientists use every day.

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Try This at Home!

Ask a grown-up to help you look up today's sunrise and sunset times. Write them down! Do it again in a few months. Are the times different? You are doing real science!

SECTION 9

Practice — Test What You Know!

Question 1: CONCEPTUAL

Which season has the most hours of daylight — summer or winter?

Show answer

Summer has the most hours of daylight. In summer, the Sun comes up early in the morning and stays up late into the evening. This gives us many hours of sunlight — about 15 hours in many places. Winter has much less daylight, only about 9 hours.

Question 2: BASIC CALCULATION

If the Sun comes up at 6:00 AM and goes down at 6:00 PM, how many hours of daylight is that?

Show answer

That is 12 hours of daylight! You can count from 6 in the morning to 6 in the evening: 6, 7, 8, 9, 10, 11, 12, 1, 2, 3, 4, 5, 6. That is 12 numbers. This is about how much daylight we get in spring and fall.

Question 3: INTERMEDIATE

Look at this record: In March, the Sun sets at 6:00 PM. In June, the Sun sets at 8:30 PM. What does this tell you about how daylight is changing from spring to summer?

Show answer

The Sun is setting later in June than in March. This means the days are getting longer as we move from spring to summer. The Sun stays up for more hours, giving us more daylight. This is part of the pattern — daylight increases from spring into summer.

Question 4: APPLIED

Imagine you want to play outside after dinner. In which season would you have more time to play in the sunlight — summer or winter? Use what you know about daylight to explain why.

Show answer

You would have more time to play outside in summer! In summer, the Sun does not go down until about 8:30 or 9:00 PM. So even after dinner, it is still light outside. In winter, the Sun goes down around 4:30 or 5:00 PM, which is before or right at dinner time. So there is no daylight left to play in after eating.

Question 5: CRITICAL THINKING

Your friend says, 'Every day has the same amount of daylight.' Do you agree or disagree? Use what you learned about the seasons to explain your answer.

Show answer

I disagree! Every day does NOT have the same amount of daylight. We learned that daylight changes through the seasons. Summer days have the most daylight — about 15 hours. Winter days have the least — only about 9 hours. Spring and fall have about 12 hours. The amount of daylight follows a pattern that repeats every year, but it is different in each season.

SUMMARY

What We Learned

Summary

We learned that the amount of daylight changes with the seasons. Summer has the most hours of sunlight, winter has the fewest, and spring and fall are in the middle. This change follows a pattern that repeats every year.

We can find this pattern by making observations — watching when the Sun comes up (sunrise) and when it goes down (sunset). We can also use records that other people made. By looking at data from the whole year, we see that daylight gets longer in summer and shorter in winter. You are learning to think like a scientist!