Podcast
Questions and Answers
What is the main reason why sugar molecules do not pass through the semi-permeable shell of an egg when it is placed in a sugar solution?
What is the main reason why sugar molecules do not pass through the semi-permeable shell of an egg when it is placed in a sugar solution?
- The size of sugar molecules is larger than the pores of the eggshell (correct)
- Sugar molecules are heavier than water molecules
- Sugar molecules are more cohesive than water molecules
- Sugar molecules are attracted to the eggshell
What is the force of attraction between molecules of the same substance called?
What is the force of attraction between molecules of the same substance called?
- Cohesion (correct)
- Osmosis
- Adhesion
- Diffusion
What is the shape of a drop of water on a waxed surface?
What is the shape of a drop of water on a waxed surface?
- Triangular
- Spherical (correct)
- Oval
- Rectangular
Why does a drop of water spread out on a glass plate?
Why does a drop of water spread out on a glass plate?
What is the term for the movement of water molecules from an area of high concentration to an area of low concentration through a semi-permeable membrane?
What is the term for the movement of water molecules from an area of high concentration to an area of low concentration through a semi-permeable membrane?
Why do water molecules move into the egg when it is placed in a sugar solution?
Why do water molecules move into the egg when it is placed in a sugar solution?
What happens to the shape of a large drop of water on a surface?
What happens to the shape of a large drop of water on a surface?
What is the reason for the difference in shape of a drop of water on a glass plate and a waxed surface?
What is the reason for the difference in shape of a drop of water on a glass plate and a waxed surface?
What is the purpose of making a mark on the blank strip of the force meter in step 2?
What is the purpose of making a mark on the blank strip of the force meter in step 2?
What happens to the force pulling the spring of the force meter when another 100 g mass is added?
What happens to the force pulling the spring of the force meter when another 100 g mass is added?
Why is it necessary to 'calibrate' the force meter?
Why is it necessary to 'calibrate' the force meter?
What is the purpose of Activity 2.6?
What is the purpose of Activity 2.6?
What type of material is commonly used in force meters?
What type of material is commonly used in force meters?
What is the device used to measure the magnitude of a force?
What is the device used to measure the magnitude of a force?
What happens to the force acting on the unknown mass when it is hung from the force meter?
What happens to the force acting on the unknown mass when it is hung from the force meter?
Why do we need to record the reading on the spring balance in Activity 2.6?
Why do we need to record the reading on the spring balance in Activity 2.6?
What is the primary function of the books developed by the Ministry of General Education and Instruction in South Sudan?
What is the primary function of the books developed by the Ministry of General Education and Instruction in South Sudan?
Which of the following is NOT a recommended way to take care of your books?
Which of the following is NOT a recommended way to take care of your books?
What should you do if your book gets damaged?
What should you do if your book gets damaged?
What consequence is mentioned regarding the selling of the books?
What consequence is mentioned regarding the selling of the books?
Which action is recommended regarding the usage of bookmarks?
Which action is recommended regarding the usage of bookmarks?
What action should you take if you lose your book?
What action should you take if you lose your book?
What is advised against when it comes to the condition of the book cover?
What is advised against when it comes to the condition of the book cover?
What is the nature of the books published by the Ministry of General Education and Instruction?
What is the nature of the books published by the Ministry of General Education and Instruction?
What do electric circuits use to control the flow of current?
What do electric circuits use to control the flow of current?
Which type of material allows electric charges to flow freely?
Which type of material allows electric charges to flow freely?
Which of the following accurately describes potential difference (p.d)?
Which of the following accurately describes potential difference (p.d)?
What happens to electric current when the resistance in the circuit increases?
What happens to electric current when the resistance in the circuit increases?
What is the primary function of a chemical cell in an electric circuit?
What is the primary function of a chemical cell in an electric circuit?
Which statement is true regarding electrostatic charges?
Which statement is true regarding electrostatic charges?
An electric circuit is considered complete when which condition is met?
An electric circuit is considered complete when which condition is met?
Which device is used to measure electric current in a circuit?
Which device is used to measure electric current in a circuit?
What defines matter in scientific terms?
What defines matter in scientific terms?
Which of the following is NOT one of the three states of matter?
Which of the following is NOT one of the three states of matter?
Which property is associated with solids?
Which property is associated with solids?
What interaction is important for understanding the different states of matter?
What interaction is important for understanding the different states of matter?
Which application best describes the physical properties of liquids?
Which application best describes the physical properties of liquids?
Which process would you investigate to understand surface tension?
Which process would you investigate to understand surface tension?
What is the significance of particle theory in understanding matter?
What is the significance of particle theory in understanding matter?
What causes the change of states of matter?
What causes the change of states of matter?
Study Notes
About the Book
- Developed by the Ministry of General Education and Instruction, Republic of South Sudan
- Designed to meet the secondary school syllabus and equip students with skills for the modern global society
- Property of the Ministry of General Education and Instruction, not for sale
How to Take Care of Your Books
- Do's:
- Cover with plastic or paper
- Keep hands clean before using
- Use a book marker, don't fold pages
- Repair damaged books quickly
- Be careful who you lend to
- Keep in a dry place
- Report lost books immediately
- Don'ts:
- Write on covers or inside pages
- Cut out pictures
- Tear out pages
- Leave open and face down
- Use pens, pencils, or thick objects as bookmarks
- Force into a full schoolbag
- Use as an umbrella or seat
Physics Student's Book 1
Unit 1: States of Matter
- Topics:
- States of matter
- Surface tension, osmosis, and capillarity
- Learning outcomes:
- Understand that matter can exist in different states
- Perform tests to investigate surface tension, osmosis, and capillarity
- Predict based on the particle theory
- Use appropriate measures and interpret results
- Report findings
- Attitudes:
- Show curiosity in carrying out experiments
Topic 1: States of Matter
- Definition of matter: anything that occupies space and has mass
- Matter can be classified into three states: solids, liquids, and gases
- Composition of matter: made up of small particles called molecules
- Physical properties of solids, liquids, and gases
- Applications of physical properties of matter
Activity 1.1: To Describe Matter
- Discuss and compare examples of matter with a partner
- Osmosis: water molecules pass through a semi-permeable shell into an egg in a sugar solution
Cohesive and Adhesive Forces
- Force of attraction between molecules of the same substance: cohesive force
- Force of attraction between molecules of different substances: adhesive force
- Examples:
- A free liquid drop is almost spherical
- A drop of water on a glass plate spreads out due to adhesion
- A drop of water on a waxed surface remains spherical due to weaker adhesion
Activity 2.6: To Determine Your Own Strength
- Measure force using a spring balance
- Record and compare readings with a partner
- Determine the difference between your strengths
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Description
This quiz is based on the secondary school series developed by the Ministry of General Education and Instruction, Republic of South Sudan. It covers the skills and knowledge needed to fit in the modern global society.