The video tutorial introduces the concept of states of matter and how thermal energy affects them. It explains that changes in states of matter are physical changes, as the substance remains the same. The tutorial discusses how adding or removing energy affects particle motion, leading to changes in state. The teacher provides examples and encourages students to fill in notes and watch a supplementary video. The session concludes with a brief overview and a look ahead to future activities.

What is the main task for today?

• Complete a worksheet and watch a video

• Read a chapter and take a quiz

• Write an essay and submit it

• Participate in a group discussion

What does thermal energy refer to?

• Electricity

• Light

• Sound

• Heat

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

What type of change occurs when ice melts into water?

• Chemical change

• Physical change

• Nuclear change

• Biological change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is an example of a physical change?

• Burning wood

• Baking a cake

• Rusting iron

• Melting gold

What happens to particles when energy is added?

• They disappear

• They speed up

• They stop moving

• They slow down

Tags

NGSS.MS-PS1-4

What is the effect of removing energy from particles?

• They move closer together

• They change color

• They speed up

• They become larger

Tags

NGSS.MS-PS1-4

Why do gases have an indefinite volume?

• Particles are very close together

• Particles are fixed in place

• Particles are very large

• Particles are far apart and move freely

What happens to the attractive forces between particles when energy is added?

• They remain the same

• They decrease

• They increase

• They become negative

Tags

NGSS.MS-PS1-4

What analogy is used to describe adding energy to particles?

• Adding paint to a wall

• Adding salt to water

• Adding sugar to your stomach

• Adding oil to a car

Tags

NGSS.MS-PS1-4

What will be the focus of next week's activities?

• Learning new concepts

• Reviewing old material

• Taking a final exam

• Applying concepts to real-life examples