AzSci

Which is true about the Theory of Natural Selection?

• Not all organisms that are born survive to reproduce,

• Organisms compete with each other to survive.

• Variations exist among organisms.

• All of answers are true.

Tags

NGSS.MS-LS4-4

What does "A" represent?

• Proton

• Neutron

• Electron

Tags

NGSS.MS-PS1-1

What does B represent?

• Proton

• Neutron

• Electron

Tags

NGSS.MS-PS1-1

What is the atomic mass of this element?

• 20

• 60

• 40

• 41

What charge do neutrons have and where are they located in the atom?

• no charge, outside nucleus

• positive charge, nucleus

• neutral, nucleus

• negative charge, outside nucleus

What charge do protons have and where are they located in the atom?

• negative charge, nucleus

• positive charge, outside nucleus

• positive charge , nucleus

• neutral charge, nucleus

What charge do electrons have and where are they located in the atom?

• no charge, nucleus

• positive charge, nucleus

• negative charge, outside nucleus

• negative charge, nucleus

Gold is an example of a(n) 

• pure element

• pure compound

• pure mixture

What is the number of electrons for this element?

• 20

• 60

• 40

• 41

This layer of the earth is the thinnest part

• crust

• outer core

• mantle

• inner core