Why is there Day and Night?

Why is the world divided into 24 time zones?

• each time zone represents about one hour of the day

• the zones change once a week

• it takes the Earth 24 hours to orbit the sun

• that is how many hours there are in two days

Some states, such as Arizona, do not observe Daylight Savings Time. This means that the sun sets later in Arizona than it sets in other states in the same time zone. Which of the following statements is true?

• More limited road visibility in Arizona during the months of October through March means that there are likely more car crashes.

• Greater road visibility in Arizona during the months of October through March means that there are likely fewer car crashes.

• More limited road visibility in Arizona during the months of October through March means that there are likely fewer car crashes.

• Greater road visibility in Arizona during the months of October through March means that there are likely more car crashes.

As you travel west across the United States

• it becomes earlier in the day.

• it becomes later in the day.

• the time does not change.

• it is impossible to accurately keep track of the time of day.

In every 24 hour period,

• there will be a sunrise and a sunset.

• there will be a daytime and a nighttime.

• the Earth will rotate once about its axis.

• the Earth will make one revolution around the sun.

Tags

NGSS.MS-ESS1-1

Any time the sun is not in the sky is considered

• night

• day

• morning

• evening

Tags

NGSS.MS-ESS1-1

Any time the sun is in the sky is considered

• night

• evening

• morning

• day

Tags

NGSS.MS-ESS1-1

Why does the sun appear to move in the sky?

• The sun spins around Earth.

• The sun gets dimmer at night.

• Earth rotates around an axis.

• Earth and the sun switch places.

Tags

NGSS.MS-ESS1-1

A ___________ is a part of the world where the same standard time is used.

• rotation

• axis

• horizon

• time zone

At midnight, your part of Earth is

• facing directly away from the sun.

• facing the sun directly.

• half way around the sun.

• facing the equator.

Tags

NGSS.MS-ESS1-1

The line that seems to separate the Earth from the sky.

• time zone

• rotation

• horizon

• axis