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Last edited 25 days ago by Learn LoopHQ.

Answer key

Chapter: 02. Matter

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Practice Exam: Chapter 2 - Matter

Name: _________________________________

Date: _________________________________

Instructions: Read each question carefully and answer to the best of your ability.

Section A: Multiple Choice Questions (Choose the best answer)

Which of the following is an example of human-made matter? a) Rock b) Air c) Plastic d) Wood

What is the quantity of matter contained in an object called? a) Volume b) Space c) Mass d) Energy

In which state of matter are molecules very closely packed? a) Solid b) Liquid c) Gas d) Plasma

The continuous zigzag motion of particles is known as: a) Circular motion b) Straight-line motion c) Brownian motion d) Fixed motion

Which process involves a substance changing directly from a solid to a gas on heating? a) Melting b) Boiling c) Condensation d) Sublimation

Section B: Fill in the Blanks

Anything that has mass and occupies space is called _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

The space occupied by matter is called its _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

The force of attraction between the same kind of particles is called _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ force.

Liquids have a definite _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ but no definite shape.

When a liquid changes into a solid on cooling, the process is called _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ or solidification.

Section C: True or False

Heat and sound are considered matter.

All living things are made of matter.

Particles of matter are always stationary.

Gases are highly compressible.

The melting point of ice is 100°C.

Section D: Short Answer Questions

List two common properties of all matter.

What is the main difference between an atom and a molecule?

Name the three main states of matter.

Why do solids not flow?

What is a chemical change?

Section E: Diagram-Based Question

Observe the diagram showing different molecular arrangements.

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"image_description": "A diagram showing three boxes labeled A, B, and C. Box A has densely packed, orderly arranged spheres. Box B has spheres that are close together but randomly arranged and slightly spread out. Box C has spheres that are far apart and scattered randomly throughout the box.",

"style": "simple diagram, molecular arrangement, particle representation",

"elements_to_include": ["Box A with ordered, dense particles", "Box B with less dense, disordered particles", "Box C with very sparse, scattered particles"],

"keywords_for_ai_generator": ["molecular states diagram", "particle arrangement solid liquid gas", "matter states visual"]

}

a) Which box (A, B, or C) represents the arrangement of molecules in a gas? b) Which box (A, B, or C) shows the arrangement of molecules in a solid? c) In which box would the intermolecular force of attraction be the weakest?

Section F: Identifying and Differentiating Concepts

Differentiate between boiling and evaporation based on temperature.

How is a natural matter different from human-made matter? Give an example for each.

Section G: Observation-Based Questions

In Activity 1 (beam balance with glasses), what observation proved that water has mass?

In Activity 4 (inverted glass in water), why did water not enter the glass initially?

Section H: Long Answer Questions

Explain why solids have a definite shape and definite volume, but liquids have a definite volume but no definite shape. Describe the molecular reasons for these properties.

Describe the process of interconversion of states of water (ice, water, steam), mentioning the terms for heating and cooling changes.

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