Could somebody answer these questions for me? Thanks!

1. What percentage of the earth is covered by water?

2. What sorts of signals does the brain use to communicate sensations, thoughts and actions?

3. Did dinosaurs and humans ever exist at the same time?

4. What is Darwin's theory of the origin of species?

5. Why does a year consist of 365 days and a day of 24 hours?

Answers

Answer 1

Explanation:

1) %70 earth is water and %30 is land.

2)" The single cells in the brain communicatethrough electrical and chemical signals.

3) b'coz earth revolve around the sun in365 days and rotates on its axis in 24 hours. It takes 365 days , because it takes that much time to complete one revolution and it takes 24 hours,because it takes time to complete one rotation as mercury takes 81 earthdays to complete one revolution.

4) Human originated from Adam And Eve.


Related Questions

how many number of electrons are in aluminium and nitrogen in their free state?​

Answers

Answer:

MRCORRECT has answered the question

Explanation:

13 electrons

So... for the element of ALUMINUM, you already know that the atomic number tells you the number of electrons. That means there are 13 electrons in a aluminum atom. you can see there are two electrons in shell one, eight in shell two, and three in shell three.

7 electrons

So... for the element of NITROGEN, you already know that the atomic number tells you the number of electrons. That means there are 7 electrons in a nitrogen atom. Looking at the picture, you can see there are two electrons in shell one and five in shell two.

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