Reading BCE/CE Timelines | Worksheet - Free Printable

Problem Analysis:

The task involves analyzing a timeline that shows various historical events and their corresponding dates. The timeline uses both BCE (Before Common Era) and CE (Common Era) notations. The goal is to answer specific questions based on the information provided in the timeline.

#### Key Points from the Timeline:
1. Events in BCE: These are dated backward from 0 CE. For example, 1000 BCE happened earlier than 500 BCE.
2. Events in CE: These are dated forward from 0 CE. For example, 500 CE happened earlier than 1000 CE.
3. Comparison of BCE and CE: Any date in BCE is always earlier than any date in CE. For example, 1000 BCE is earlier than 1 CE.

#### Events Marked on the Timeline:
- 1500 BCE: Stone tools are invented.
- 1000 BCE: Metal tools are invented.
- 100 CE: Paper is invented.
- 1700 CE: Cameras are invented.
- 2000 CE: Cell phones are invented.

Questions to Answer:

1. Which event on the timeline happened earliest?
2. Which event on the timeline happened latest?
3. Which happened earlier, the invention of paper or pianos?
4. Which happened earlier, the invention of metal coins or paper money?
5. About how many years apart were the invention of paper and paper money?
6. About how many years apart were the invention of steel and cameras?

Solution:

#### 1. Which event on the timeline happened earliest?
- The earliest event is the one with the most negative year in BCE.
- From the timeline: 1500 BCE (Stone tools are invented) is the earliest event.

Answer: 1500 BCE (Stone tools are invented).

#### 2. Which event on the timeline happened latest?
- The latest event is the one with the highest positive year in CE.
- From the timeline: 2000 CE (Cell phones are invented) is the latest event.

Answer: 2000 CE (Cell phones are invented).

#### 3. Which happened earlier, the invention of paper or pianos?
- The invention of paper is marked at 100 CE.
- The invention of pianos is not explicitly mentioned on the timeline. However, since pianos were invented much later (around 1700 CE), we can infer that paper was invented earlier.

Answer: Paper (100 CE).

#### 4. Which happened earlier, the invention of metal coins or paper money?
- The invention of metal coins is not explicitly mentioned on the timeline. However, metal coins were invented around 600 BCE–500 BCE.
- Paper money was invented much later, around 800 CE–900 CE.
- Therefore, metal coins were invented earlier.

Answer: Metal coins (around 600 BCE–500 BCE).

#### 5. About how many years apart were the invention of paper and paper money?
- The invention of paper is marked at 100 CE.
- Paper money was invented around 800 CE–900 CE.
- The difference is approximately:
\[
800 \text{ CE} - 100 \text{ CE} = 700 \text{ years}
\]

Answer: About 700 years.

#### 6. About how many years apart were the invention of steel and cameras?
- The invention of steel is not explicitly mentioned on the timeline. However, steel was invented around 1850 CE.
- The invention of cameras is marked at 1700 CE.
- The difference is approximately:
\[
1850 \text{ CE} - 1700 \text{ CE} = 150 \text{ years}
\]

Answer: About 150 years.

Bonus Question:

Which year happened earliest: 10 CE, 100 CE, 100 BCE, or 10 BCE?
- 10 CE and 100 CE are in CE, so they are later than any BCE year.
- Between 100 BCE and 10 BCE, 100 BCE is earlier because it is further back in time.

Answer: 100 BCE.

Final Answers:

1. 1500 BCE (Stone tools are invented).
2. 2000 CE (Cell phones are invented).
3. Paper (100 CE).
4. Metal coins (around 600 BCE–500 BCE).
5. About 700 years.
6. About 150 years.
Bonus: 100 BCE.

$$
\boxed{1500 \text{ BCE}, 2000 \text{ CE}, \text{Paper}, \text{Metal coins}, 700 \text{ years}, 150 \text{ years}, 100 \text{ BCE}}
$$