lesson 3
fill in the missing vocabulary word for each definition.
- ______ atoms or molecules which have gained or lost electrons
- ______ anything that has mass and takes up space
- ______ the temperature at which the vapor pressure of a liquid equals the pressure surrounding it so that the liquid changes into a vapor
- what does boiling depend on?
- why does water boil faster at the top of a mountain? see picture below

Question

Accepted Answer

### First Definition (atoms or molecules which have gained or lost electrons)
# Brief Explanations:
The term for atoms or molecules that have gained or lost electrons is "ion". Ions are formed when an atom or molecule undergoes a process of losing or gaining electrons, resulting in a net electrical charge.
# Answer:
ion

### Second Definition (anything that has mass and takes up space)
# Brief Explanations:
The term for anything that has mass and takes up space is "matter". Matter is the substance of which all physical objects are composed, and it has mass and occupies volume (takes up space).
# Answer:
matter

### Third Definition (the temperature at which the vapor pressure of a liquid equals the pressure surrounding it so that the liquid changes into a vapor)
# Brief Explanations:
The term for this temperature is "boiling point". The boiling point is a characteristic property of a liquid, and it varies with the surrounding pressure. When the vapor pressure of the liquid equals the external pressure, the liquid boils and turns into vapor.
# Answer:
boiling point

### Question: What does boiling depend on?
# Brief Explanations:
Boiling depends on the surrounding pressure (and the nature of the liquid). The boiling point of a liquid is the temperature at which its vapor pressure equals the external (surrounding) pressure. So, if the surrounding pressure changes, the boiling point (and thus the boiling process) changes. For example, at higher altitudes (lower atmospheric pressure), water boils at a lower temperature. Also, different liquids have different boiling points at a given pressure due to their molecular structures and intermolecular forces.
# Answer:
Boiling depends on the surrounding pressure (and the liquid's nature, with different liquids having different boiling points at a given pressure due to intermolecular forces).

### Question: Why does water boil faster at the top of a mountain?
# Brief Explanations:
At the top of a mountain, the atmospheric pressure is lower than at sea level. The boiling point of water is the temperature at which its vapor pressure equals the surrounding atmospheric pressure. Since the atmospheric pressure is lower at higher altitudes, the vapor pressure of water reaches the surrounding pressure at a lower temperature. So, water can reach its boiling point (which is lower than 100°C at sea level) faster, meaning it boils faster.
# Answer:
Water boils faster at the top of a mountain because the atmospheric pressure is lower there. The boiling point of water (the temperature at which its vapor pressure equals the surrounding pressure) is lower at lower pressures, so water reaches its boiling point more quickly.

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QUESTION IMAGE

Question

Explanation:

First Definition (atoms or molecules which have gained or lost electrons)

Answer:

Second Definition (anything that has mass and takes up space)