Mouth is the first portion of the alimentary canal that receives food and produces saliva.
The invention of the telegraph in 1844 enabled meteorologists to share information about weather conditions quickly. This led to what meteorlogical creation?
Explain how the isotopes of an element differ. a. They each have a different number of electrons in their outermost energy level.
b. they each have a different number of protons in their nuclei.
c. they each have a different number of neutrons in their nuclei.
d.they each have a different charge.
are alternate mass forms of an element. It has the same number of protons and electrons but differ in their number of neutrons
Which phrase best defines rocks? A. objects made of crystals, minerals, water, and air B. objects made of crystals and water C. objects made of one or more minerals D. objects made of minerals and organic matter
What does "Mean" in science mean?