Energy and state of Matter

General SCIENCE
Grade 7

My dear girls…………
Good Morning

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before we start:

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Notebook

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Unit 3 – Understanding matter

Module - Classification and

states of matter

Energy and
States of Matter

Lesson 1

Energy and
States of Matter

Pretest

Lesson 1

Multiple Choice

Matter is made up of motionless particles. _______________

• True

• False

Multiple Choice

Each of the following is a state of matter EXCEPT ____.

• solid

• Liquid

• Gas

• Density

Multiple Choice

Kinetic energy is the _____ of motion.

• temperature

• energy

• heat

• state

Multiple Choice

The model shown represents one molecule of hydrazine, a chemical in rocket fuel. The black spheres represent nitrogen atoms, and the white spheres represent hydrogen atoms. Based on the model, what is the atomic composition of hydrazine?

• 1 atom of nitrogen and 1 atom of hydrogen

• 4 atoms of nitrogen and 2 atoms of hydrogen

• 2 atoms of nitrogen and 2 atoms of hydrogen

• 2 atoms of nitrogen and 4 atoms of hydrogen

Multiple Choice

A student drew this molecular model to represent liquid water at 10°C.

How should the student change the model to best represent the water at 20°C?

• Show the water molecules packed more tightly together.

• Show some of the chemical bonds in the water molecules breaking

• Show some of the water molecules forming chemical bonds with each other.

• Show the water molecules with longer arrows to represent an increase in motion.

Learning Objectives

•

Understand what gives each state of matter its unique
properties.

•

Identify what energy can a particle have.

•

Explain what makes up a substance.

•

Analyze how else can the elements in a substance be
represented.

Vocabulary

✓ Matter
✓Compress
✓ Particle
✓ Molecules
✓ Kinetic energy
✓ Temperature
✓Celsius
✓ Thermometer

✓ Potential energy
✓Thermal energy
✓ Atom
✓ Substance
✓ Element
✓ Compound
✓Chemical formula
✓ Element symbol

Textbook # 76

Starter Activity

Which student do you agree with the most?

Open Ended

Open ended Question:

What properties do solids, liquids, and gases have?

Draw

Draw the Particles in a solid

Draw

Draw the Particles in a gas

Draw

Draw the Particles in a Liquid

What gives each state of matter its unique

properties?

Inclass Activity - Investigation

Textbook # 78

Activity - Investigation

Textbook # 78

Activity - Investigation

Textbook # 78

Activity - Investigation

Textbook # 78

The shape of the rock is constant, whereas the
shape of the water and inflated balloon can be
changed. The volume of the rock and water are
constant, but the balloon can be compressed
under pressure.

Activity - Investigation

Textbook # 78

Activity - Investigation

Textbook # 78

Solids do not
change volume
or shape; they
cannot be
compressed

Liquids do not change
volume but they can
change shape; they
cannot be compressed

Gases can
change volume
and shape; they
can be
compressed

Liquids can flow from container to container as seen in the lab.
Gases also flow.
The gas can flow out of the balloon.

Multiple Choice

Which state of matter has both definite shape and definite volume?

• Solid

• Liquid

• Gas

• Plasma

Poll

In which state of matter are the particles only vibrating?

• Solid

• Liquid

• Gas

• Plasma

Multiple Choice

Which state of matter has no definite shape and no definite volume?

• Solid

• Liquid

• Gas

• Plasma

Multiple Choice

This state of matter has a changeable shape but the volume does not change. What is it?

• Solid

• Liquid

• Gas

• Plasma

What gives each state of matter its unique

properties?

What gives each state of matter its unique

properties?

What gives each state of matter its unique

properties?

Activity: Complete the table

➢
Properties of matter

Properties

Solid

Liquid

Gas

Shape and

volume

Movement
between
containers

Compressibility

Activity - Investigation

Textbook # 81

https://nt7-mhe-complex-assets.mheducation.com/nt7-mhe-complex-
assets/K-
5SCI_FastTrack_Complex_Assets/StatesOfMatterBasics/states-of-
matter-basics_en.html

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What gives each state of matter its unique

properties?

What gives each state of matter its unique

properties?

Question time:

➢
Why can gases can be compresses easily while solids
and liquids cannot?

Answer:

Question time:

➢
Why can gases can be compresses easily while solids
and liquids cannot?

Answer: Particles in gases are widely spaced. Particles
in liquids and solids are close to one another.

Multiple Choice

As matter changes state from liquid to solid, the atoms move___?

• Closer together

• Stay the same

• Farther apart

Activity

Textbook # 80

Write the answer in the textbook

Activity

Textbook # 80

Answer

Multiple Choice

All particles that make up matter are in constant motion.

• Agree

• Disagree

Multiple Choice

What two states of matter are pictured in the image below?

• liquid and gas

• gas and solid

• solid and liquid

• volume and solid

Multiple Choice

Particle motion in ice is -----------than particle motion in water.

• slower

• faster

• similar