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## How does density affect speed of sound?

When the medium is dense, the molecules in the medium are closely packed which means that the sound travels faster. Therefore, the speed of sound increases as the density of the medium increases.

## What increases as an object’s particles vibrate faster?

As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space. The atoms can get closer which results in the matter contracting.

## What causes particles of a substance to move faster?

When a substance is heated, it gains thermal energy. Therefore, its particles move faster and its temperature rises. When a substance is cooled, it loses thermal energy, which causes its particles to move more slowly and its temperature to drop.

## What are the 4 changes of state?

Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization.

## What are 3 examples of state changes?

Phase changes include vaporization, condensation, melting, freezing, sublimation, and deposition. Evaporation, a type of vaporization, occurs when particles of a liquid reach a high enough energy to leave the surface of the liquid and change into the gas state. An example of evaporation is a puddle of water drying out.

## How do you calculate change of state?

Calculate the thermal energy change when 0

## What are 2 ways to change the state of a substance?

Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING. If water is heated, it changes to steam (a gas).

## How can we change the state of any matter explain with an example?

You can take matter from one state to another by adding or removing energy. Watch this! Substances change state when its thermal energy increases or decreases sufficiently. Particles of a liquid have more thermal energy than particles of the same substance in a solid form.

## Can matter changes its state?

Matter changes state when energy is added or taken away. Most matter changes because of heat energy. When matter is heated enough, the molecules move faster and with greater energy. If enough heat is added, a solid can become liquid and a liquid can become gas.

## What are three signs that a chemical change has taken place?

Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.

2021-05-15