How did ancient people tell time?

Natural ways of keeping time

In ancient time,people had to use the sun and the moon to tell timeThey got up when the sun came up and worked in the fields until the sun went down

Man-made things

The sand clock is made of two glass balls joined by a narrow neckThe top ball was filled with sandThe sand slowly moved through the neck into the bottom底部ballPeople knew the time by watching how much sand fell to the bottom hallPeople also made the water clockThey made a small hole near the bottom of a potwhen the water in the pot drippedout,marking刻度inside the pot showed how much time passed

Body clocks in living things

Animals' body clock

Animals don't need clocks to know timeThey have their body clocksBirds know when to fly to warmer places before winterSome animals know when to keep more food for the winterSome fish know when it's time to move up the river and lay eggs

Plants' own clock

Plants have their own clocks to keep timePlants know when to open flowers or when to drop their leaves

Body clock in human beings

People also have their own body clocksWhen we get used to our livesour body clocks can be very exactIt can tell us when it's time to wake upIt can also tell us when to eat or to go to sleep

1How could an ancient farmer know when to go back home from the field in the daytime?

ABy looking at the moon                         BBy the sand clock or the water clock

CBy looking at the sun                               DBy feeling whether tired or not

2According to the passagehow can animals know time?

AThey use body clocks                           BThey ask other animals

CThey use the sun and the moon                DThey make something to tell time

3How many kinds of living things with body clocks are mentioned here?

ATwo                BThree               CFour                   DSix

4In what way is the sand clock the same as the water clock in telling time?

ABoth of them have a neck

BBoth of them have two glass balls

CBoth of them can be used only once

DBoth of them give the time by quantity數(shù)量).

5The passage is mainly about _________

Aman-made clocks                                    Bnature's clocks

Ctime and clock                                           Dhow people keep time

1、CABDC

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How did ancient people tell time?

◆Natural ways of keeping time

In ancient time,people had to use the sun and the moon to tell time.They got up when the sun came up and worked in the fields until the sun went down.

◆Man-made things

The sand clock is made of two glass balls joined by a narrow neck.The top ball was filled with sand.The sand slowly moved through the neck into the bottom(底部)ball.People knew the time by watching how much sand fell to the bottom hall.People also made the water clock.They made a small hole near the bottom of a pot.when the water in the pot dripped(滴)out,marking(刻度)inside the pot showed how much time passed.

◆Body clocks in living things

Animals' body clock

Animals don't need clocks to know time.They have their body clocks.Birds know when to fly to warmer places before winter.Some animals know when to keep more food for the winter.Some fish know when it's time to move up the river and lay eggs.

Plants' own clock

Plants have their own clocks to keep time.Plants know when to open flowers or when to drop their leaves.

Body clock in human beings

People also have their own body clocks.When we get used to our lives,our body clocks can be very exact.It can tell us when it's time to wake up.It can also tell us when to eat or to go to sleep.

1.How could an ancient farmer know when to go back home from the field in the daytime?

A.By looking at the moon.                         B.By the sand clock or the water clock.

C.By looking at the sun.                               D.By feeling whether tired or not.

2.According to the passage,how can animals know time?

A.They use body clocks.                           B.They ask other animals.

C.They use the sun and the moon.                D.They make something to tell time.

3.How many kinds of living things with body clocks are mentioned here?

A.Two.                B.Three.               C.Four.                   D.Six.

4.In what way is the sand clock the same as the water clock in telling time?

A.Both of them have a neck.

B.Both of them have two glass balls.

C.Both of them can be used only once.

D.Both of them give the time by quantity(數(shù)量).

5.The passage is mainly about _________.

A.man-made clocks                                    B.nature's clocks

C.time and clock                                           D.how people keep time

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