Sciences 7e année - Weeblymstilley.weebly.com/uploads/8/1/2/6/81265442/sc7.2.2... · Web viewApplication of thermal expansion and contraction of solids liquids and gasses Train tracks

Grade 7 Science 2016 Name: ___________________________

Sc7.2.2: The Particle Theory of MatterChapter 5 Plan – Study Guide

1. States of matter a) 3 States of matter (p.146-147)b) Particles in the 3 states of matter (p.147-148; p.156)c) Thermal expansion and contraction – particle explanation (p.149-150)

2. Matter, their particles and movement : a) Definition of matter (p.136)b) 5 points of the particle theory (p.138)c) Kinetic Energy (p.138)d) Kinetic energy and temperature; definition of temperature (p.140-141)

3. State changes a) 6 state changes (p160-161)b) Temperature and state changes.c) Core Lab 5-3B : The plateau problem (p.166-167)

Sc7.2.2 The particle theory of matter – p.1

Vocabularykinetic gas  particlecondensation   liquid solid  deposition matter  sublimationevaporation  molecule temperaturefreezing  melting

Definitions: put the correct word with the correct definition

1.___________________________: anything that takes up space and has mass.

2.___________________________: state of matter that keeps its shape and volume.

3.____________________________: state of matter that keeps its volume but can change shape depending on the container.

4. _____________________________: state of matter that changes its shape and volume to take up all the space in a container.

5. _________________________ or ___________________________: the smallest “piece”; too small to be seen even with the most powerful microscopes.

6.___________________________________ energy: the energy of movement.

7.____________________________: the measure of the degree of heat of a substance; a measure of the average kinetic energy of particles in a substance.

8.___________________________________: when a solid changes into a gas.

9.___________________________________: when a gas changes into a sold.

10. _________________________ : when a gas changes into a liquid

11. ____________________________: when a liquid changes into a gas.

12. ____________________________: when a liquid changes into a solid.

13. ___________________________________ : when a solid changes into a liquid

States of matterSc7.2.2 The particle theory of matter – p.2

What are the 3 states of matter? ________________________________________

Complete the table:

Solid Liquid GasDoes it keep or change its

shape?Does it keep or change its

volume?

3 examples

Sc7.2.2 The particle theory of matter – p.3

Use p.138 of your textbook. Copy the 5 points of the particle theory in the first column. In the second column, explain it in your own words and/or with drawings

5 points of the particle theoryTextbook Own words/drawings

States of matter and the particle theory.Object(solid, liquid gas)

Space between particles

Force of attraction between particles

Movement of particles

Sc7.2.2 The particle theory of matter – p.4

_____________

_____________

_____________

How can the particle theory of matter explain thermal expansion and contraction of substances?

Thermal expansion and contraction and the particle theory of matter (PTM)

(p.149)

Sc7.2.2 The particle theory of matter – p.5

Application of thermal expansion and contraction of solids liquids and gasses

Train tracks (p. 150)

Sc7.2.2 The particle theory of matter – p.6

Season:_________

Explanation :

In Summer, the tracks expand with heat. Particles in the solid move faster/slower and the force of attraction between particles gets more/less intense. The space between the tracks is smaller/bigger.

In winter, the tracks contract with the cold. Particles in the solid move faster/slower and the force of attraction between the particles gets more/less intense. The space between the tracks is smaller/bigger.

Season :_________

Soccer ball

Season :_________

Explanation :

In summer, air inside the soccer ball expands with heat. The particles of gas move slower/faster and the force of attraction between the particles becomes more/less intense. The space between the particles of gas is smaller/bigger.

In winter, air the in soccer ball ___

Season :_________Liquid thermometer

Explanation :When we put a liquid thermometer in a cold substance, the liquid will expand/contract. The particles move slower/faster and the force of attraction between the particles becomes more/less intense. The space between the particles of liquid is smaller/bigger.When we put a liquid thermometer in a hot substance it ________

Sc7.2.2 The particle theory of matter – p.7

Kinetic Energy1. What is kinetic energy? (p. 138)

2. Imagine the people described in the situations in question a, b & c are similar to particles in a substance. For all questions, use your imagination to describe a situation.

a. Students in school have a lot of kinetic energy :

b. Students in school have a little bit of kinetic energy :

c. Who has more kinetic energy: a marathon runner or a sprinter that runs 100m? Explain your answer

3. Describe the molecules in the following situations: a. Describe a situation where molecules in a substance have a lot of kinetic energy

b. Describe a situation where molecules in a substance have a little bit of kinetic energy

3. What is the relationship between the kinetic energy of molecules and temperature?

Sc7.2.2 The particle theory of matter – p.8

Changes of stateDraw a diagram that shows the changes of state between a solid, liquid and gas. Use p. 160 of your textbook.

Sc7.2.2 The particle theory of matter – p.9

What change of state is happening in the photo? ________________________

Explain what is happening to the molecules during the change of state.

Is heat added or taken away from the water during this change of state?

Class discussion: This diagram shows what happens to molecules when heatedWrite a description for each step.

Sc7.2.2 The particle theory of matter – p.10

A B C D E

A –

B-

C-

D –

E -

This graph shows what happens to the temperature when heatedAdd a description of what is observed in the beaker on each section of the graph.

Sc7.2.2 The particle theory of matter – p.11

Questions: 1. Why did the temperature not change between 5 and 10 minutes?

2. Why did the temperature not change between 15 and 20 minutes?

Sc7.2.2 The particle theory of matter – p.12

RevisionSolid Liquid Gas

Keep or change shape?Keep or change volume?Distance between particles

Movement of particles

Drawing of particles

2. 5 points of the particle theory.

123

Sc7.2.2 The particle theory of matter – p.13

453. What is kinetic energy?

4. Give three examples of situations where the objects have different amounts of kinetic energy

5. What is the relationship between the movement of particles and kinetic energy

6. Draw a diagram to show the 6 changes of state.

Sc7.2.2 The particle theory of matter – p.14

7. Explain what happens to the molecules in a liquid when they freeze.

8. Explain why the temperature of a mixture of ice and water stays exactly at 0 oC while the ice is melting.

9. Explain why the temperature of boiling water always stays exactly at 100 oC the whole time the water is evaporating.

Sc7.2.2 The particle theory of matter – p.15