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# Science for Kids/Experts

ExpertAverage RatingsExpertise

## Ralph Salier-Hellendag

Available
Science Fair Judge for many years and experience with robotics, biology, chemistry, industrial processes, metalurgy and metal forming.

## walter hintz

U.S.
Available
I can answer questions from kids in all grades in the areas of general science, biology and nature study

## Sue Kayton

U.S.
Available
I can answer almost any student science question! I especially like ones involving silkworms, spacecraft and computers.

#### 2017-02-27 Help:

Hi Aishwarya,    All matter is made of something.  In the case of water, it is made of two elements, hydrogen and oxygen.  Since it is a combination of two elements it is called a molecule.  Hydrogen and

#### 2017-02-26 Help:

The basis of all matter are atoms and the particles that make the atom.  It is the particles within the atom which have mass.  Add together the mass of all of the particles within an atom and you get the

#### 2017-02-26 Help:

Aishwarya,    Volume has nothing to do with density or matter, all volume is, is a way to measure something be it a gas, liquid or solid.  You can even measure a vacuum by volume.  Density is only a property

#### 2017-02-26 Help:

Aishwarya,    Density is only one of many properties (characteristics) of matter.  Matter is the basis.  It is made of atomic particles that have mass.  Density does not have mass.  Density speaks to how

#### 2017-02-25 Help:

Hi Aishwarya,    I'm not sure I understand your question.  There are 4states of matter: gas, liquid, solid and plasma.  Each can have different densities.  This depends on various physical factors such

Science for Kids