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Practicals

SOLUTIONS KINDLY CROSS CHECK ✍🏽 1. 396 birds 2. I and II only 3. Ewes come on heat within a short period of time 4. 75kg 5. Emits sparks 6. A floating body displaces its own weight 7. Carbon, hydrogen and Oxygen 8. 32 weeks 9. 40seconds 10. Dipping 11. Anaerobic fermentation of organic waste 12.Polymerization 13.Coagulate milk Protein 14. View near object but not far object 15. for preparing soap 16. cobalt 17. 66.7J 18. I and III only 19. global warming 20. close to the ground 21. Heavier than air 22. Iris 23. Cabbage

BONO

Obj

6di.The instruments used to measure the following quantities are: 1. Potential Difference (Voltage): The instrument used to measure potential difference or voltage is called a Voltmeter. 2. Electric Current: The instrument used to measure electric current is called an Ammeter.

Question 4 Ai. Hay and silage are both forms of forage used as animal feed, but they differ in their preparation and moisture content. Hay is dried and cured grass or legume plants that are cut, dried, and baled. Silage, on the other hand, is made by fermenting green forage crops, such as corn or grass, in airtight conditions, resulting in a moist and acidic feed. Ii. Some common sources of protein for poultry feed are soybean meal, fish meal, and poultry by-product meal. Ci. The nitrogen cycle has several benefits, including promoting plant growth. 2.maintaining soil fertility. 3. and supporting the production of proteins in living organisms. Ii. Human activities such as agriculture and industrial processes can significantly impact the nitrogen cycle. The use of synthetic fertilizers in agriculture 2. and the burning of fossil fuels release excessive amounts of nitrogen into the environment, disrupting the natural balance of the nitrogen cycle.

6cii. When selecting a suitable housing system for livestock, it's important to consider the following three factors: 1. Climate and Environmental Conditions: The local climate and environmental conditions play a significant role in determining the appropriate housing system. For example, in areas with extreme temperatures or heavy rainfall, shelter from the elements may be crucial. Consider whether the housing system provides protection from adverse weather conditions and temperature extremes. 2. Type of Livestock: Different species of livestock have varying housing requirements. Consider the specific needs of the animals, including their size, behavior, and space requirements. Dairy cattle, for example, may require a different housing setup compared to poultry or pigs. 3. Management Goals and Resources: Your management goals and available resources, such as land, labor, and budget, will influence your choice of housing system. Assess whether you have the infrastructure and capacity to implement and maintain the chosen system effectively. Consider factors like feeding practices, waste management, and disease control in line with your goals and available resources.

6ci.Two common housing systems for keeping livestock in Ghana are: 1. Free-Range or Pasture-Based Systems: In this system, livestock such as cattle, sheep, and goats are allowed to graze and forage in open pastures or communal lands. 2. Zero-Grazing or Stall Feeding Systems: In contrast to free-range systems, zero-grazing involves confining livestock in stalls or pens.

6aii. Two examples of abiotic factors in an ecosystem are: 1. Temperature: The temperature of an ecosystem, whether it's hot or cold 2. Soil pH: Soil pH refers to the acidity or alkalinity of the soil.

(e) (i) Movable joints in the human body can be found in locations such as the shoulders, hips, and knees. (ii) Immovable joints, also known as fixed or fibrous joints, are present in the human skull, where the cranial bones are tightly fused together. (2) (a) Diaphragm: The diaphragm is a respiratory muscle that contracts and flattens during inhalation, increasing the volume of the chest cavity and allowing air to be drawn into the lungs. (b) Intercostal muscle: The intercostal muscles are found between the ribs and aid in the expansion and contraction of the chest cavity during breathing. (c) Ribs: Ribs protect vital organs like the heart and lungs. (3) Three problems contributing to poor pig production in Ghana are disease outbreaks, inadequate nutrition, and poor management practices. Two management practices performed on piglets are castration and tail docking. (d) (i) One location of a movable joint in the human body is the shoulder joint. (ii) One location of an immovable joint in the human body is the sutures of the skull. 6. (a) (i) Biotic factors are living organisms and their interactions within an ecosystem. (ii) Two examples of abiotic factors in an ecosystem are sunlight and temperature. (b) (1) Structural formulas of organic compounds: (a) CH4 (b) CH3OH (methanol) (c) CH3COOH (acetic acid) (2) Names of organic compounds: (a) Methane (b) Methanol (c) Acetic acid (4) (ii) Two housing systems for keeping livestock in Ghana are free-range systems and confinement systems. Three factors to consider when selecting a suitable housing system for livestock are climate conditions, the type of livestock being raised, and available resources and space. (d) (i) Instruments used to measure quantities: (a) Potential difference is measured using a voltmeter. (b) Electric current is measured using an ammeter. To determine the resistance of the resistor in the electric circuit, you can use Ohm's law: R = V/I, where R is resistance, V is potential difference (240 V), and I is current (24 A). Therefore, the resistance is R = 240 V / 24 A = 10 ohms.

2. d(i) Biodiversity refers to the variety of living organisms in a particular area or on Earth. It includes the diversity of species, their genetic variations, and the different ecosystems they inhabit. Biodiversity is important because it contributes to the stability and resilience of ecosystems, supports essential ecological processes, and provides us with valuable resources. It's like having a wide range of different plants, animals, and ecosystems all living together in harmony. 🌿🦁🌍. 2. d(ii) 1. Ecological Services 2. Medicinal Resources 3. Economic Benefits

2. a(ii) (a) Hoeing: Hoeing helps to break up the soil, remove weeds, and improve soil aeration. (b) Stumping: Stumping involves removing tree stumps from the land, which helps to clear the area and create a smooth surface for farming or construction. 2.b(i)Sea breeze occurs when cooler air from the sea moves towards the land, replacing the warmer air over the land. This happens because during the day, the land heats up faster than the sea. The warm air over the land rises, creating a low-pressure area. The cooler air from the sea then moves in to fill this void, creating a refreshing breeze. It's a natural way for the land and sea to balance out temperature differences. 🌊🌬️. 2c. (i) (a) Malleability: Malleability refers to the ability of a metal to be hammered or pressed into different shapes without breaking. It's like when you can easily flatten a piece of metal into a thin sheet. (b) Soronity: I'm sorry, but I'm not familiar with the term "soronity." It might be a typo or a less common term. Could you please provide more context or clarify the term? (c) Lustre: Lustre refers to the shininess or reflectivity of a metal's surface. Metals with high lustre have a bright and reflective appearance, like a polished mirror.

5ci. Immovable Joint: The skull sutures, such as the coronal suture, are examples of immovable joints in the human body. Movable Joint: The knee joint is an example of a movable joint in the human body.

(e) (i) Movable joints in the human body can be found in locations such as the shoulders, hips, and knees. (ii) Immovable joints, also known as fixed or fibrous joints, are present in the human skull, where the cranial bones are tightly fused together. (2) (a) Diaphragm: The diaphragm is a respiratory muscle that contracts and flattens during inhalation, increasing the volume of the chest cavity and allowing air to be drawn into the lungs. (b) Intercostal muscle: The intercostal muscles are found between the ribs and aid in the expansion and contraction of the chest cavity during breathing. (c) Ribs: Ribs protect vital organs like the heart and lungs. (3) Three problems contributing to poor pig production in Ghana are disease outbreaks, inadequate nutrition, and poor management practices. Two management practices performed on piglets are castration and tail docking. (d) (i) One location of a movable joint in the human body is the shoulder joint. (ii) One location of an immovable joint in the human body is the sutures of the skull. 6. (a) (i) Biotic factors are living organisms and their interactions within an ecosystem. (ii) Two examples of abiotic factors in an ecosystem are sunlight and temperature. (b) (1) Structural formulas of organic compounds: (a) CH4 (b) CH3OH (methanol) (c) CH3COOH (acetic acid) (2) Names of organic compounds: (a) Methane (b) Methanol (c) Acetic acid (4) (ii) Two housing systems for keeping livestock in Ghana are free-range systems and confinement systems. Three factors to consider when selecting a suitable housing system for livestock are climate conditions, the type of livestock being raised, and available resources and space. (d) (i) Instruments used to measure quantities: (a) Potential difference is measured using a voltmeter. (b) Electric current is measured using an ammeter. To determine the resistance of the resistor in the electric circuit, you can use Ohm's law: R = V/I, where R is resistance, V is potential difference (240 V), and I is current (24 A). Therefore, the resistance is R = 240 V / 24 A = 10 ohms.

(e) (i) Movable joints in the human body can be found in locations such as the shoulders, hips, and knees. (ii) Immovable joints, also known as fixed or fibrous joints, are present in the human skull, where the cranial bones are tightly fused together. (2) (a) Diaphragm: The diaphragm is a respiratory muscle that contracts and flattens during inhalation, increasing the volume of the chest cavity and allowing air to be drawn into the lungs. (b) Intercostal muscle: The intercostal muscles are found between the ribs and aid in the expansion and contraction of the chest cavity during breathing. (c) Ribs: Ribs protect vital organs like the heart and lungs. (3) Three problems contributing to poor pig production in Ghana are disease outbreaks, inadequate nutrition, and poor management practices. Two management practices performed on piglets are castration and tail docking. (d) (i) One location of a movable joint in the human body is the shoulder joint. (ii) One location of an immovable joint in the human body is the sutures of the skull. 6. (a) (i) Biotic factors are living organisms and their interactions within an ecosystem. (ii) Two examples of abiotic factors in an ecosystem are sunlight and temperature. (b) (1) Structural formulas of organic compounds: (a) CH4 (b) CH3OH (methanol) (c) CH3COOH (acetic acid) (2) Names of organic compounds: (a) Methane (b) Methanol (c) Acetic acid (4) (ii) Two housing systems for keeping livestock in Ghana are free-range systems and confinement systems. Three factors to consider when selecting a suitable housing system for livestock are climate conditions, the type of livestock being raised, and available resources and space. (d) (i) Instruments used to measure quantities: (a) Potential difference is measured using a voltmeter. (b) Electric current is measured using an ammeter. To determine the resistance of the resistor in the electric circuit, you can use Ohm's law: R = V/I, where R is resistance, V is potential difference (240 V), and I is current (24 A). Therefore, the resistance is R = 240 V / 24 A = 10 ohms.

3. (a) (i) Greenhouse gases are gases in the Earth's atmosphere that can trap heat from the sun, leading to the greenhouse effect. Two examples of greenhouse gases are carbon dioxide (CO2) and methane (CH4). (ii) Greenhouse gases are important to humans because they help regulate the Earth's temperature by trapping heat, which keeps the planet warm enough to support life. They also play a crucial role in agriculture by enhancing the growth of plants through the greenhouse effect. (b) Four basic components of the mammalian skeleton include bones, cartilage, ligaments, and tendons. (c) (i) Heaping soil around the base of a growing plant is called "hill planting." (ii) Replanting at spots where seeds failed to germinate is called "reseeding" or "replanting." (iii) Exposing seedlings to harsh weather conditions before transplanting is often referred to as "hardening off." (iv) Cutting excess plant parts is known as "pruning." (v) Reducing overcrowding of seedlings on a nursery is called "thinning." (d) (i) Three harmful effects of radioactivity include radiation sickness, increased risk of cancer, and genetic mutations. (ii) Radioactivity is the process by which unstable atomic nuclei decay, emitting radiation in the form of particles or electromagnetic waves. 4. (a) (i) Hay is dried grass or legumes that are typically stored for later use as animal feed. Silage, on the other hand, is fermented green forage, often stored in a silo. The main difference is the moisture content and preservation method. (ii) Three sources of protein in poultry feedstuff are soybean meal, fish meal, and corn gluten meal. (b) (i) The energy the body will have at a height of 5 m above the ground can be calculated using the gravitational potential energy formula: E = m * g * h, where E is energy, m is mass, g is acceleration due to gravity, and h is height. (ii) The velocity of the body at a height of 5 m above the ground can be calculated using the equation: v = sqrt(2 * g * h), where v is velocity, g is acceleration due to gravity, and h is height. (c) (i) Three benefits that humans derive from the nitrogen cycle include nitrogen fixation by legumes improving soil fertility, the availability of nitrogen for plant growth, and the role of nitrogen in the synthesis of proteins and DNA. (ii) Two human activities that affect the nitrogen cycle are the excessive use of synthetic fertilizers, which can lead to nitrogen runoff and water pollution, and the burning of fossil fuels, which releases nitrogen oxides into the atmosphere. (d) (i) To confirm that a colorless liquid in the laboratory is water, perform a simple test like adding a small amount of anhydrous copper(II) sulfate (white) to the liquid. If the copper sulfate turns blue, it confirms the presence of water. (ii) Two stages in the large-scale water treatment process are coagulation/flocculation and sedimentation. 5. (a) (i) To calculate the mass of ammonium chloride crystals needed for a 200 cm³ aqueous solution with a concentration of 0.5 mol dm³, you can use the formula: mass = moles × molar mass. First, calculate the moles of ammonium chloride: moles = concentration × volume (in dm³). Then, use the molar mass of NH4Cl to find the mass. (ii) Two apparatus that will be needed for the preparation of the solution are a balance for measuring the mass of ammonium chloride and a beaker for mixing the solution. (b) (i) Doping in electronics involves intentionally introducing impurities into a semiconductor material to alter its electrical properties. It can make a semiconductor more conductive (n-type doping) or less conductive (p-type doping). (ii) The charge carriers in semiconductors are electrons (in the conduction band) for n-type doping and holes (vacant electron positions in the valence band) for p-type doping.

3. (a) (i) Greenhouse gases are gases in the Earth's atmosphere that can trap heat from the sun, leading to the greenhouse effect. Two examples of greenhouse gases are carbon dioxide (CO2) and methane (CH4). (ii) Greenhouse gases are important to humans because they help regulate the Earth's temperature by trapping heat, which keeps the planet warm enough to support life. They also play a crucial role in agriculture by enhancing the growth of plants through the greenhouse effect. (b) Four basic components of the mammalian skeleton include bones, cartilage, ligaments, and tendons. (c) (i) Heaping soil around the base of a growing plant is called "hill planting." (ii) Replanting at spots where seeds failed to germinate is called "reseeding" or "replanting." (iii) Exposing seedlings to harsh weather conditions before transplanting is often referred to as "hardening off." (iv) Cutting excess plant parts is known as "pruning." (v) Reducing overcrowding of seedlings on a nursery is called "thinning." (d) (i) Three harmful effects of radioactivity include radiation sickness, increased risk of cancer, and genetic mutations. (ii) Radioactivity is the process by which unstable atomic nuclei decay, emitting radiation in the form of particles or electromagnetic waves. 4. (a) (i) Hay is dried grass or legumes that are typically stored for later use as animal feed. Silage, on the other hand, is fermented green forage, often stored in a silo. The main difference is the moisture content and preservation method. (ii) Three sources of protein in poultry feedstuff are soybean meal, fish meal, and corn gluten meal. (b) (i) The energy the body will have at a height of 5 m above the ground can be calculated using the gravitational potential energy formula: E = m * g * h, where E is energy, m is mass, g is acceleration due to gravity, and h is height. (ii) The velocity of the body at a height of 5 m above the ground can be calculated using the equation: v = sqrt(2 * g * h), where v is velocity, g is acceleration due to gravity, and h is height. (c) (i) Three benefits that humans derive from the nitrogen cycle include nitrogen fixation by legumes improving soil fertility, the availability of nitrogen for plant growth, and the role of nitrogen in the synthesis of proteins and DNA. (ii) Two human activities that affect the nitrogen cycle are the excessive use of synthetic fertilizers, which can lead to nitrogen runoff and water pollution, and the burning of fossil fuels, which releases nitrogen oxides into the atmosphere. (d) (i) To confirm that a colorless liquid in the laboratory is water, perform a simple test like adding a small amount of anhydrous copper(II) sulfate (white) to the liquid. If the copper sulfate turns blue, it confirms the presence of water. (ii) Two stages in the large-scale water treatment process are coagulation/flocculation and sedimentation. 5. (a) (i) To calculate the mass of ammonium chloride crystals needed for a 200 cm³ aqueous solution with a concentration of 0.5 mol dm³, you can use the formula: mass = moles × molar mass. First, calculate the moles of ammonium chloride: moles = concentration × volume (in dm³). Then, use the molar mass of NH4Cl to find the mass. (ii) Two apparatus that will be needed for the preparation of the solution are a balance for measuring the mass of ammonium chloride and a beaker for mixing the solution. (b) (i) Doping in electronics involves intentionally introducing impurities into a semiconductor material to alter its electrical properties. It can make a semiconductor more conductive (n-type doping) or less conductive (p-type doping). (ii) The charge carriers in semiconductors are electrons (in the conduction band) for n-type doping and holes (vacant electron positions in the valence band) for p-type doping.

1.c(ii) Sure! Two examples of single fertilizers are urea, which is a nitrogen-based fertilizer, and superphosphate, which is a phosphorus-based fertilizer.

1. d(i) When evaporation happens, liquid turns into vapor and takes away heat energy from the surroundings. This process cools down the environment. It's like sweating on a hot day, making you feel cooler