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by Ron Kurtus

A total of 256 comments and questions have been sent in. They are listed according to date.

## List of next 10 letters

### Country

Changing States of Matter Converting matter Tanzania

Changing States of Matter Why does temperature remain constant? USA

Density Define the term relative density Kenya

Changing States of Matter Project on changing phases or state of matter USA

Density Factors Exceptions to the trend in densities Pakistan

Kinetic Theory of Matter Discuss kinetic theory of matter Liberia

Density Factors Increase in density beneath volcano Ghana

Subatomic Particles Bose–Einstein condensate state of matter India

Kinetic Theory of Matter Behaviour of atoms during evaporation Namibia

Kinetic Theory of Matter Attraction or repulsion between the particles of a gas Nigeria

Next 10

First 10 letters

## Converting matter

Topic: Changing States of Matter

### Question

December 8, 2015

Explain how can matter be converted into another matter specify the process involved

EVASIUS NDAMILA - Tanzania

26600

You can change the state or phase of a material from solid to liquid to gas and back by applying heat or cold.

However, one material cannot be changed to another material. Iron cannot be changed to copper.

## Why does temperature remain constant?

Topic: Changing States of Matter

### Question

December 2, 2015

I am teacher of 6th graders learning about phase of matter change. I am having trouble explaining why the temperature remains the same while freezing is happening. Any help would be appreciated. Thank you

mary - USA

26587

I just added an explanation at Temperature Constant During Phase Change. I hope that helps. Let me know if it clarifies things for your students.

## Define the term relative density

Topic: Density

### Question

November 30, 2015

define the term relative density?

Khamisi - Kenya

26579

Density is mass per unit volume. Relative density is comparing the density with respect to that of water, which equals 1.0. It is also called specific gravity.

## Project on changing phases or state of matter

Topic: Changing States of Matter

### Question

November 24, 2015

Dear School for Champions,

We are students from ZWMS in Indiana. We're doing a project on why some substances skip a phase change. We were wondering if you could give us some pointers?
Thank you for your time and consideration!

Sincerely, Talli and Eleanor

Talli - USA

26560

The change in phase of state of matter is affected by temperature and pressure, as well as the molecular structure of the material. See Pressure and States of Matter for a nice illustration of changing phases, including skipping a phase.

I hope that helps. Best wishes for success in your project.

## Exceptions to the trend in densities

Topic: Density Factors

### Question

October 15, 2015

My question is!!
Kindly tell the few major exception in the trend of density among periodic table

aysha - Pakistan

26443

It seems that the inert gases, such as helium, neon, argon, etc, are exceptions to the density trend in the periodic table. See Periodic Trends for an explanation.

## Discuss kinetic theory of matter

Topic: Kinetic Theory of Matter

### Question

October 11, 2015

Discuss the kinetic theory of matter and base on collision temperature. Pressure. Particles, expansion

Alfan - Liberia

26432

You can use the lesson material to discuss the features when you consider the effects of the motion of atoms and molecules. Their collisions result in the effects of temperature, pressure and expansion.

## Increase in density beneath volcano

Topic: Density Factors

### Question

October 2, 2015

what causes an increase in density beneath a recently active volcano?

maud - Ghana

26415

It could be that the molten lava can be compressed, thus increasing the density over solid rock.

## Bose–Einstein condensate state of matter

Topic: Subatomic Particles

### Question

September 11, 2015

is bose-einstien latest disscovered state of matter ?
about it on class 12 level and also general

shivansh - India

26373

A Bose–Einstein condensate is a state of matter of a dilute gas of bosons cooled to temperatures very close to absolute zero. A boson is what is called a "force carrier" subatomic particle.

The Bose–Einstein state of matter was discovered in 1995, but it is the most recent new state.

## Behaviour of atoms during evaporation

Topic: Kinetic Theory of Matter

### Question

August 12, 2015

what is the behaviour of atoms during the evaporation phase change in terms of kinetic theory?

Wilka - Namibia

26268

Evaporation is when the higher energy atoms escape the body of the liquid. Those atoms have enough kinetic energy to remain in the gas phase. The average energy of those atoms remaining in the liquid drops, because of the loss of high kinetic energy atoms.

## Attraction or repulsion between the particles of a gas

Topic: Kinetic Theory of Matter

### Question

August 11, 2015

According to kinetic theory of matter,the force of attraction or repulsion between the particles of a gas are
a.elastic
b.large
c.small
d.strong
e.weak

Timilehin olawumi - Nigeria

26267

Although the collisions between particles are elastic, the attraction or repulsions between particles is very weak.

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## Resources and references

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