BIOLOGY MIDDLE SCHOOL

What is mouth explain in brief ​

Answers

Answer 1
Answer:

Answer:

Mouth is the first portion of the alimentary canal that receives food and produces saliva.

Answer 2
Answer: The mouth is the opening of the lower part of the human face where the lips are through which food and drink are taken and through which people are able to communicate with one another

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HIGH SCHOOL

The invention of the telegraph in 1844 enabled meteorologists to share information about weather conditions quickly. This led to what meteorlogical creation?

Answers

The invention of the telegraph during the early 19th century paved way for meteorologists to invent the weather map as well. Weather maps are primarily used to display a geographical map in a specific location wherein its weather features were attached in a particular time as represented by symbols.
HIGH SCHOOL

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.

Answers

I hope this helps a little bit 
Isotope

are alternate mass forms of an element. It has the same number of protons and electrons but differ in their number of neutrons

HIGH SCHOOL

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

Answers

A. objects made of crystals minerals water and air

Process of elimination-
there isn’t organic matter in rocks so D is out
they are made of minerals so B is out
some types of rock (pumice) have air bubbles in them so A is more likely than C

Answer: C

Explanation:

HIGH SCHOOL

What does "Mean" in science mean?

Answers

The mean in science is a measure of central tendency which tells you what the most average value of a certain sample is. When you take all the values and sum them up and finally divide them by the number of values which you took, this tells you what the average of your sample is. 
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