G2 History of Clocks①

Ancient people used ( ) to read the time.

• rain

• sky

• nature

• sun

About 6,000 years ago, Egyptians used the ( ).

• sun

• water

• time

• flower

They put sticks in the ground, and the ( ) told them the time.

• people

• sun

• shadows

• water

About 3,500 years ago,

Egyptians started to measure the time without ( ).

• water

• rain

• people

• sun

They put water in ( ).

• glasses

• bottles

• pots

• cups

The ( ) in the pots told them the time.

• lines

• names

• points

• sun

About 1,500 years ago, other people used ( ).

• fire

• sun

• water

• flower

Fire burned candles, so people saw the time by the ( ) on them.

• fire

• points

• lines

• candles

Q. Was it easy to check the time long ago?

A. ( ) it ( ).

Q. What did people burn to see the time?

A. They ( ) candles.