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# An Egyptian Clock

Media Type:
Video

Running Time: 4m 57s
Size: 13.7 MB

or

Source: Cyberchase: "Clock Like an Egyptian"

### Collection Developed by:

Collection Credits

### Collection Funded by:

Funding for the VITAL/Ready to Teach collection was secured through the United States Department of Education under the Ready to Teach Program.

In this video segment from Cyberchase, the CyberSquad is trying to rescue Dr. Marbles and the Encryptor chip. The CyberSquad must construct a timekeeper in order to track the amount of time they have left to make the rescue before the door closes and seals their escape route.

Teaching Tips

Here are some Frame, Focus and Follow-up suggestions for using this video in a math lesson.

What is Frame, Focus and Follow-up?

Frame: How do you normally keep track of time? Are there other ways to keep track of time besides using clocks and watches? If you didn’t have a watch or clock and you wanted to time how long it takes you to run once around a track, how might you do it?

Focus: As you watch this video segment, listen for Matt to describe how much time the CyberSquad has to get to the mummy chamber and back. What unit of measure does the CyberSquad use to talk about the amount of time?

Follow Up: How does an hourglass help us tell time? How did the CyberSquad use an hourglass to help them determine how much time they had left? How might you find an hourglass useful?

Transcript

INEZ: It's like every minute, that thing gets lower!

MATT: Come on, we're wasting time. We've gotta find Marbles fast!.

JACKIE: Matt, wait! You heard what that voice said. If we go any further, we could be trapped!

DIGIT: Good point. Time to go home.

INEZ: Hold it. I think time is the key. If only we knew how much time we had before the door shuts.

MATT: Hey, check it out. The water seems to be running out at a steady pace. And it looks like the door is dropping at the same rate.

JACKIE: I bet if we could figure out how long it takes for the water to drop one stripe, we could figure out how much time we have left. Gimme your watch, Matt, I'll time it.

MATT: It's busted.

JACKIE: No problem. You’re in the presence of the queen of steady counting. Just tell me when the water gets to the next stripe and I'll start.

INEZ: Hold it...hold it...count!

JACKIE: One alligator, two alligator, three alligator...- four alligator, five alligator, six alligator...

HACKER: Did you say Dr. Marbles??! I want him!

BINKY That's the problem with you, Hacker. It's always me, me, me. You never think of anyone but yourself.

HACKER: Fine! Let's talk about Marbles, then. Give him to me!

BINKY: I'll get back to you.

MUMMY: Did you make the deal?

BINKY: Not, yet. But I will.

JACKIE: ...sixty-one alligator, sixty-two alligator, sixty-three alligator...DONE! OK, it takes about a second to say each alligator. So, sixty three alligator is about...- a minute.

DIGIT: Except you lost count a couple of times when you sneezed.

INEZ: Close enough! If it falls one stripe every minute - how much time do we have?

MATT: ...fourteen, fifteen stripes left. At a minute a stripe - we have 15 minutes to find Dr. Marbles and get back here before...

JACKIE: Before we get stuck in here forever! That's a little risky, don't you think?

MATT: We have no choice, Jax.

INEZ: Well, wait a second Matt.

MATT: Not again!

INEZ: If we don't keep track of time while we're in there, how will we know when our fifteen minutes is up?

MATT: We'll...let Jax count out in gator time.

JACKIE: No way! What if I lose track? What if I sneeze again? And - how will we know how much time is left?

INEZ: There must be a way to measure the passage of time while the door is dropping.

JACKIE: What we really need is a clock.

DIGIT: Oops. Sorry about the hour glass. Now it's a half-hour glass. HA!

MATT: Wait a minute! An hourglass measures time by dripping sand at a steady rate - all we need is the top part to do that! And something to drip through!

MATT: Let’s try it. Pour some in. Listen!

INEZ: The rubies are dripping at the same rate as the water!

JACKIE: And the same as my alligator count!

MATT: So we can use them to keep track of time!

INEZ: But that means we have to count every single ruby as it falls out! No way we can to do that!

DIGIT: Hey, look what else I found! An ancient me! See the boid! See the boid drink!

MATT: That’s just what we need to measure time!

DIGIT: Uhh! Tell me I didn't see that!

MATT: Let'em drop, Jax.

JACKIE: It works! We don't have to count the rubies one-by-one, we can catch them in the bird cup. Then when it's full... The bird cup fills and tips, the rubies onto the floor.

MATT: It empties itself!

JACKIE: Alright! We can keep time by counting cups instead of rubies!

INEZ: You forgot something, guys.

MATT: Now what?

INEZ: We need to know how many cups it takes for the door to drop one stripe.

MATT: It's almost at the next stripe! Fill it up!

INEZ: Get ready. Start the clock!

MATT: Clock started.

JACKIE: Measuring time!

MATT: Time measured!

INEZ: This is perfect! The bird cup fills up in the same amount of time the door drops one stripe!

MATT: Twelve stripes - that means we’ve got twelve cups of time to get to the mummy chamber and back. Let’s motor!

INEZ: Let's go!

BINKY: Oh, dear. They are stubborn, aren't they?

Standards

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