Our Earth cycles through day and night regularly. This cycle allows us to have a way to keep track of time and schedule our daily lives. Most of our activities and interactions occur during the day and most of our sleeping occurs at night. Without a regular day and night cycle, people's schedules would be quite different from one another.

Which statements are true about Earth's day and night cycle?

The day and night cycle is the length of time it takes the Earth to rotate one time.
On Earth, one day and night cycle is 24 hours long.
The day and night cycle is the length of time it takes for Earth to travel around the Sun.
The sun appears to rise from the same direction and set in the same direction daily.
The day and night cycle allowed people to be able to tell time before clocks were invented.
One day and night cycle is complete when all four seasons have passed in a year.

The following statements are true :

The day and night cycle is the length of time it takes the Earth to rotate one time.

On Earth, one day and night cycle is 24 hours long.

The sun appears to rise from the same direction and set in the same direction daily.

The day and night cycle allowed people to be able to tell time before clocks were invented.

Explanation:

The day and night cycle is the length of time it takes the Earth to rotate one time is true because Earth takes 1 day to rotate around itself and a day involves day and night.

On Earth, one day and night cycle is 24 hours long is true because one day and night cycle is equal to the rotation of the earth and earth takes 24 hours to rotate.

The day and night cycle is the length of time it takes for Earth to travel around the Sun is false because day and night cycle is 24 hours (or) 1 day whereas Earth takes 365 days to travel around the Sun.

The sun appears to rise from the same direction and set in the same direction daily is true because as the Earth rotates from West to East, the Sun appears to rise from East and sets on West.

The day and night cycle allowed people to be able to tell time before clocks were invented is true because people studied the movements of Sun which caused days and nights and used devices like Sundial to predict time. Before clocks were invented a day was divided into day and night.

One day and night cycle is complete when all four seasons have passed in a year is false because, it takes 365 days for all four seasons to pass, whereas it takes only 1 day for a day and night cycle.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.