Who Set The First Clock?

• 12 AM Midnight

• 12 AM Noon

• 12 PM Midnight

• 12 PM Noon

Tags

NGSS.MS-ESS1-1

• 1 AM

• 1 PM

• 7 AM

• 7 PM

Tags

NGSS.MS-ESS1-1

• 12 AM Noon

• 12 AM Midnight

• 12 PM Noon

• 12 PM Midnight

Tags

NGSS.MS-ESS1-1

• 6 PM

• 6 AM

• 12 AM

• 3 PM

Tags

NGSS.MS-ESS1-1

In ancient times, why would a cloudy day make it hard to know what time it is?

• People use shadow clocks to tell the months of the year. Without the sun, you can't use a shadow clock.

• Ancient people used shadow clocks to tell time. Without the sun, you can't use a shadow clock.

• Ancient people used shadow clocks to tell time. Without the moon, you can't use a shadow clock.

• People use shadow clocks to tell time. Without the sun, you can still use a shadow clock.

Say one morning the Earth suddenly stopped spinning. Would a shadow clock still work?

• YES

• NO

The planet Mercury takes 176 days to do one spin around its pole. Compared to the Earth, would the Sun appear to move more quickly across Mercury's sky or more slowly?

• More quickly

• More slowly

A girl named Lindsey has 4 creases on each finger instead of 3. If she counts like an Egyptian, what number will she count to with one hand?

• 12

• 14

• 16

• 18

Lindsey built a clock with 16 divisions, which we’ll call Lindsey Hours. Just like our clocks, the hour-hand on Lindsey’s clock goes around twice per day. How many Lindsey Hours are in one day?

• 16

• 12

• 32

• 24