Science - Chapter 2 Lesson 2 What are the states of matter? Lesson Review

Describe matter in the state of *gas*.

1. If in a container, they *take up the space* of their container 2. Bounce off each other & move quickly

All matter has ___1____ and takes up ____2____.

1. Mass 2. Space

Describe matter in the state *solid.*

1. The particles are packed tightly together. 2. Have their own shape

Describe matter in the state of *liquid*.

1. The particles are packed together less tightly. 2. Flow past one another 3. *Take the shape* of their containers

Name 2 ways that matter can change shapes.

1. by heating it 2. by cooling it

In what state cannot you not "see water?"

Gas

What state of matter does water change into when it evaporates?

Gas

What kind of matter is "all around us ?"

Gas (our air and atmosphere)

What happens when *water boils*?

It *evaporates*, or changes from liquid water to water vapor.

What happens when liquid water cools to 0⁰C (32⁰F)?

It *freezes* , or changes from a liquid to a solid (*ice*)

What happens when water vapor in the air cools?

It condenses. (condensation)

What kind of matter takes the shape of its container?

Liquid Matter

In what two states can you "see water?"

Liquid and Solid

Are *water vapor* and *steam* the same thing?

No. *Water vapor is a gas*. *Steam is droplets of liquid water* in the air.

What are the *states of matter?*

The forms that matter can take. Three states of matter are: 1. Solid 2. Liquid 3. Gas

Name the substance that can change into all 3 states of matter.

Water

What terms did you learn that describe the changes water undergoes when it *changes states through heating*?

Water Vapor - a gas Steam - droplets of liquid water in the air Gas - water you cannot see Condensation - to change from a gas into a liquid Evaporation - to change from liquid water to water vapor (gas)

Ice melting into water is a change between which two states. A. liquid to gas B. solid to liquid C. gas to liquid D. liquid to solid

solid to liquid

What happens when you add heat to a solid?

*ADD HEAT= SOLID → LIQUID → GAS* *ice(solid)* turn to *water(liquid)* turn to *water vapor(gas)*

What happens when you cool a gas?

*COOL A GAS = GAS → LIQUID → SOLID * *water vapor(gas)* to *water(liquid)* to *ice(solid)*

What happens when water is heated to 100⁰Celsius?

*It boils*, or changes from liquid water to *water vapor*.

What do the melting temperature and freezing temperature of water have in common?

*THE FREEZING TEMPERATURE & MELTING TEMPERATURE ARE THE SAME - 0⁰C (32⁰F)* 1. Water freezes at 0⁰C (32⁰F), and ice melts at 0⁰C (32⁰F). 2. 0⁰C (32⁰F) is the temperature where *matter can change from solid to liquid or liquid to solid*.

What is water as a *gas* called?

*Water Vapor*