Ambo Ifa Boru

⏰Day - 2

🎓Chemistry Grade 9 - Unit 1: Chemistry and Its Importance


1. What is the scope of chemistry?

A) Only studying chemical reactions
B) Studying matter and its changes
C) Ignoring the environment
D) Focusing on physics

2. How is chemistry related to other natural sciences?

A) It has no connection to other sciences
B) It overlaps with biology
C) It is independent of other sciences
D) It interacts with physics and biology
3. What role does chemistry play in production and society?

A) None
B) Minimal impact
C) Significant impact
D) Negative impact only
4. Which of the following is a common chemical industry in Ethiopia?

A) Textile manufacturing
B) Agriculture
C) Mining
D) Leather processing
5. The modern periodic table is based on the work of:

A) Lavoisier
B) Rutherford
C) Mendeleev
D) Dalton
6. Which type of bonding involves the transfer of electrons?

A) Covalent bonding
B) Ionic bonding
C) Metallic bonding
D) Hydrogen bonding
7. What is the composition of an atom with the same number of protons but different neutrons?

A) Ion
B) Isotope
C) Molecule
D) Compound
8. Who proposed the fundamental laws of chemical reactions?

A) Avogadro
B) Boyle
C) Lavoisier
D) Mendeleev
9. Which subatomic particle has a positive charge?

A) Proton
B) Neutron
C) Electron
D) Nucleus
10. What is the main focus of chemistry?

A) Studying plants
B) Studying animals
C) Studying matter and its changes
D) Studying weather patterns
11. Which element is essential for all organic compounds?

A) Nitrogen
B) Carbon
C) Oxygen
D) Hydrogen
12. What is the relationship between chemistry and biology?

A) They are completely unrelated
B) Chemistry is a subset of biology
C) Biology is a subset of chemistry
D) They overlap in the study of living organisms
13. Which scientist is known for his contributions to the atomic theory?

A) Aristotle
B) Democritus
C) Newton
D) Galileo
14. What is the significance of Mendeleev's periodic table?

A) It classified elements based on atomic number
B) It arranged elements by increasing atomic mass
C) It predicted the properties of undiscovered elements
D) It focused only on metals
15. How does chemistry impact society?

A) It has no relevance in daily life
B) It influences medicine and technology
C) It is limited to laboratories
D) It only affects the environment negatively
16. Which type of bonding involves the sharing of electrons?

A) Ionic bonding
B) Covalent bonding
C) Metallic bonding
D) Van der Waals bonding
17. What is the smallest unit of an element that retains its chemical properties?

A) Atom
B) Molecule
C) Compound
D) Ion
18. What is the most abundant element in the universe?

A) Hydrogen
B) Oxygen
C) Carbon
D) Nitrogen
19. Who discovered the electron?

A) Rutherford
B) Thomson
C) Dalton
D) Mendeleev

20. Which type of bonding is found in metals?

A) Ionic bonding
B) Covalent bonding
C) Metallic bonding
D) Polar covalent bonding



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Day 1.

Answer for Grade 10 Biology Entrance Exam Preparation Questions from Units 1 & 2:

1. Answer: C) Inorganic composition
Explanation: Living things are characterized by having organic composition, meaning they are made up of carbon-based molecules.

2. Answer: D) To systematically investigate natural phenomena
Explanation: The Scientific Method is a systematic approach to investigating natural phenomena through observation, hypothesis formation, experimentation, and conclusion drawing.

3. Answer: B) GPS device
Explanation: A GPS device is a field tool used by biologists for tracking locations but not specifically for biological research.

4. Answer: B) Condenser
Explanation: The condenser in a light microscope controls the amount of light that passes through the specimen to enhance visibility.

5. Answer: C) Read and understand the safety guidelines
Explanation: Understanding laboratory safety guidelines is crucial before conducting any experiments to prevent accidents and ensure a safe working environment.

6. Answer: A) Classifying living organisms
Explanation: Taxonomy is the science of classifying living organisms into groups based on shared characteristics.

7. Answer: C) Kingdom Protista
Explanation: Kingdom Protista includes unicellular eukaryotic organisms like algae and protozoa.

8. Answer: C) Carl Linnaeus
Explanation: Carl Linnaeus is known as the father of taxonomy for his work in developing the modern system of biological classification.

9. Answer: B) All living organisms are made up of cells
Explanation: The cell theory states that all living organisms are composed of one or more cells, which are the basic units of life.

10. Answer: B) Budding
Explanation: Budding is a form of asexual reproduction where a new organism develops as a growth on the parent organism.

11. Answer: D) Menstruation in females
Explanation: Menstruation is a secondary sexual characteristic that occurs during the menstrual cycle in females.

12. Answer: A) Production of sperm
Explanation: The primary function of the testes is to produce sperm through a process called spermatogenesis.

13. Answer: A) A cycle of hormonal changes in females
Explanation: The menstrual cycle is a series of hormonal changes and physical events that prepare the female body for pregnancy.

14. Answer: B) Substances that provide energy for cells
Explanation: Nutrients are substances that provide energy and essential components for cellular functions.

15. Answer: B) Pathogens such as bacteria and viruses
Explanation: Infectious diseases are caused by pathogens like bacteria, viruses, fungi, and parasites that invade the body and disrupt normal functions.

16. Answer: A) A community of organisms interacting with each other and their environment
Explanation: An ecosystem consists of living organisms interacting with each other and their physical environment.

17. Answer: B) Changes in the composition of a community over time
Explanation: Ecological succession refers to the gradual changes in the species composition of a community over time.

18. Answer: A) Living organisms
Explanation: Biotic components of an ecosystem include living organisms such as plants, animals, and microorganisms.

19. Answer: C) Yonas Yohannes
Explanation: Yonas Yohannes is a renowned taxonomist in Ethiopia known for his contributions to the study of Ethiopian flora and fauna.

20. Answer: A) By the energy requirement
Explanation: Active transport requires energy input to move molecules across a cell membrane, while passive transport does not require energy and occurs through diffusion or osmosis.




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Day 1
Grade 10 Biology Entrance Exam Preparation Questions - Units 1 & 2

1. Which of the following is NOT a characteristic of living things?
A) Growth and development
B) Reproduction
C) Inorganic composition
D) Response to stimuli

2. What is the main purpose of the Scientific Method?
A) To prove preconceived ideas
B) To make predictions
C) To establish universal truths
D) To systematically investigate natural phenomena

3. Which of the following is a field tool commonly used by biologists?
A) Bunsen burner
B) GPS device
C) Microscope
D) Petri dish

4. The part of the light microscope that controls the amount of light passing through the specimen is called the:
A) Objective lens
B) Condenser
C) Eyepiece
D) Stage

5. What should you do first to ensure laboratory safety?
A) Wear gloves and goggles
B) Clean up spills immediately
C) Read and understand the safety guidelines
D) Run experiments without supervision

6. Taxonomy is the science of:
A) Classifying living organisms
B) Studying rocks and minerals
C) Analyzing weather patterns
D) Predicting earthquakes

7. Which kingdom in the five-kingdom system includes unicellular prokaryotic organisms?
A) Kingdom Plantae
B) Kingdom Animalia
C) Kingdom Protista
D) Kingdom Fungi

8. Who is known as the father of taxonomy?
A) Charles Darwin
B) Gregor Mendel
C) Carl Linnaeus
D) Louis Pasteur

9. The cell theory states that:
A) All cells have a nucleus
B) All living organisms are made up of cells
C) Cells can only reproduce asexually
D) Cells do not require nutrients for survival

10. Asexual reproduction methods include:
A) Fertilization
B) Budding
C) Pollination
D) Meiosis

11. Which of the following is NOT a primary sexual characteristic?
A) Development of breasts in females
B) Growth of facial hair in males
C) Deepening of voice in males
D) Menstruation in females

12. What is the primary function of the male reproductive structure called the testes?
A) Production of sperm
B) Storage of sperm
C) Hormone production
D) Menstruation

13. What is the menstrual cycle?
A) A cycle of hormonal changes in females
B) A cycle of cellular respiration
C) A cycle of digestive processes
D) A cycle of photosynthesis

14. What are nutrients?
A) Elements that are not essential for living organisms
B) Substances that provide energy for cells
C) Inorganic compounds found in rocks
D) Compounds that cause diseases

15. Infectious diseases are caused by:
A) Genetic mutations
B) Pathogens such as bacteria and viruses
C) Environmental factors
D) Nutritional deficiencies

16. What is an ecosystem?
A) A community of organisms interacting with each other and their environment
B) A laboratory for studying cells
C) A system of classification for living organisms
D) A method of birth control

17. Ecological succession refers to:
A) The process of organizing organisms into taxonomic groups
B) Changes in the composition of a community over time
C) The movement of substances across a cell membrane
D) The process of reproduction in plants

18. What are the biotic components of an ecosystem?
A) Living organisms
B) Non-living factors
C) Physical environment
D) Inorganic compounds

19. Which of the following is a renowned taxonomist in Ethiopia?
A) Jane Goodall
B) Wangari Maathai
C) Yonas Yohannes
D) Dian Fossey

20. How do you differentiate between active and passive transport in cells?
A) By the energy requirement
B) By the size of molecules transported
C) By the direction of movement
D) By the involvement of carrier proteins



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