Temperature, Pressure, and States of Matter

What are the two main factors that determine the state of matter?

• Temperature and pressure

• Volume and mass

• Density and viscosity

• Color and texture

At what temperature does water boil at standard atmospheric pressure?

• 0°C

• 50°C

• 100°C

• 150°C

What happens to the particles of a substance when it is heated?

• They move faster and spread out

• They move slower and come closer together

• They stop moving

• They change color

Why does it take longer to cook food on a mountain than at sea level?

• Because the air pressure is lower at higher altitudes

• Because the temperature is higher at higher altitudes

• Because the water freezes at higher altitudes

• Because the air is denser at higher altitudes

What is plasma?

• A state of matter where particles are ions and free electrons

• A state of matter where particles are tightly packed

• A state of matter where particles are loosely packed

• A state of matter where particles are in fixed positions

What is the main idea of the text?

• Water boils at different temperatures depending on altitude.

• Temperature and pressure determine the state of matter.

• Plasma is the most common state of matter in the universe.

• The behavior of particles changes with temperature.

According to the text, what happens to particles when a substance is heated?

• They slow down and come closer together.

• They move faster and spread out.

• They turn into plasma.

• They stop moving completely.

Which of the following best explains why water boils at a lower temperature on a mountain?

• The air pressure is higher at high altitudes.

• The temperature is colder at high altitudes.

• The air pressure is lower at high altitudes.

• The particles move faster on a mountain.

What can happen to matter under extreme temperatures and pressures, according to the text?

• It can change into a gas.

• It can become plasma.

• It can evaporate.

• It can melt.

Which sentence from the text best supports the idea that pressure affects the state of matter?

• "The state of matter depends on two main factors: temperature and pressure."

• "When you heat a substance, its particles move faster and spread out."

• "Pressure... affects how closely particles in a substance are packed together."

• "Plasma is found in stars, including our Sun."