General Science Assessment Quiz

<p>chlorenchyma and sieve tubes (C)</p> Signup and view all the answers

<p>Fe (A)</p> Signup and view all the answers

<p>Smooth muscle (B)</p> Signup and view all the answers

<p>All of these (D)</p> Signup and view all the answers

<p>A car is moving on a straight road (B)</p> Signup and view all the answers

<p>J.J. Thomson (D)</p> Signup and view all the answers

<p>Chondrocytes (A)</p> Signup and view all the answers

<p>Virchow (B)</p> Signup and view all the answers

<p>a translucent mixture is formed (B)</p> Signup and view all the answers

<p>No new substances are formed (A), The change can be easily reversed (B)</p> Signup and view all the answers

<p>River lift (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Chemical energy stored in the battery is converted to electrical energy as the battery powers the bulb. The electrical energy is then converted to light and heat energy when the filament in the bulb glows.</p> Signup and view all the answers

<p>Average power is the ratio of the total work done or the total energy consumed to the total time taken for the process.</p> Signup and view all the answers

<p>The water is not pure because the boiling point of pure water at normal pressure is 100 °C. This impure water will freeze at a temperature below 0°C.</p> Signup and view all the answers

<p>The time taken by the sound wave to travel 1.6 km is 2 seconds.</p> Signup and view all the answers

<p>An experiment can be set up to show the sublimation of ammonium chloride by heating the compound in a china dish covered with an inverted funnel. The solid ammonium chloride will directly convert into gaseous state without going through the liquid state and deposit on the cold sides of the funnel, demonstrating sublimation.</p> Signup and view all the answers

<p>The force of friction between the stone and the ice is 4 N.</p> Signup and view all the answers

<p>A bullet fired from a gun possesses high momentum due to its high velocity, which can be lethal when it impacts a person.</p> Signup and view all the answers

<p>The electronic configuration of Na+ is 2, 8.</p> Signup and view all the answers

<p>Echo ranging is a technique that uses sound waves to detect objects underwater. One application of echo ranging is in SONAR (Sound Navigation and Ranging), where it helps locate underwater objects such as submarines, shipwrecks, or schools of fish.</p> Signup and view all the answers

<p>a. The number of waves produced in one second is 180 waves per second. b. The time required to produce one wave is 0.00556 seconds.</p> Signup and view all the answers

<p>The ion is Mg²⁺ (Magnesium ion).</p> <p>The electronic configuration of the Mg²⁺ ion is 2, 8. The electronic configuration of the Magnesium atom is 2, 8, 2.</p> <p>The number of protons is 12 because the atomic number of Magnesium is 12 and the atomic number represents the number of protons in the nucleus.</p> Signup and view all the answers

<p>The maximum height attained by the stone is 1.25 meters, and it takes 0.5 seconds to reach this height.</p> Signup and view all the answers

<p>i. The time taken by the electron to acquire double its initial velocity is 5 seconds. ii. The distance covered in this time is 37.5 × 10⁴ meters.</p> Signup and view all the answers

<p>a. The stretched string of the catapult possesses potential energy. b. The stone will simply fall down without much force if the string is not stretched. c. Shyam prevented his friend from aiming at the bird because he understood that harming a living being was wrong. His behaviour demonstrates empathy and consideration for others.</p> Signup and view all the answers

<p>It is difficult to walk on sand because the sand is loose and provides less resistance to the foot. The foot sinks into the sand, making it harder to move forward efficiently.</p> Signup and view all the answers

<p>The recoil of a heavy gun is less because its mass is greater. The amount of recoil is inversely proportional to the mass of the gun.</p> Signup and view all the answers

<p>Chromatin is a complex of DNA and proteins found in the nucleus of a cell. It appears as a diffuse, thread-like structure. Chromosomes are condensed, rod-shaped structures that form during cell division, visible under a microscope. Chromosomes are essentially condensed forms of chromatin.</p> Signup and view all the answers

<p>There will be no net movement of solvent. Hence, there will be no change in the shape and size of the cell. (A), Cell will shrink due to exosmosis. (B), Cell will swell up due to endosmosis (C)</p> Signup and view all the answers

<p>The protective tissue in plants is called the epidermis. It's the outermost layer of cells that covers the plant and protects it from various external factors. The epidermis is made up of a single layer of closely packed, flattened cells and can be covered with a waxy coating called the cuticle. The epidermis often has specialized structures like stomata, which regulate the exchange of gases, and trichomes, which can provide protection from herbivores or regulate temperature.</p> Signup and view all the answers

<p>i. The total gravitational force due to Jupiter and Saturn on a 50 kg person on Earth is approximately 1.8 × 10⁻⁵ N. This force is negligible compared to the gravitational force due to the Earth itself, which would be around 490 N. ii. The bag of sugar will weigh slightly more when taken to Antarctica. This is because the acceleration due to gravity is slightly higher at the poles (Antarctica) than at the equator.</p> Signup and view all the answers

<p>a. The time taken for the stone to fall the first 50 meters is approximately 3.16 seconds.<br /> b. The time taken for the stone to fall the next 50 meters is approximately 1.31 seconds.</p> Signup and view all the answers

<p>The Golgi apparatus is a cellular organelle that plays a critical role in modifying, sorting, and packaging proteins and lipids. It receives materials from the endoplasmic reticulum and further processes them before they are delivered to their final destinations within the cell or outside the cell. Key functions include:</p> <ol> <li>Modifying proteins and lipids.</li> <li>Sorting and packaging proteins and lipids into vesicles.</li> <li>Producing lysosomes, which are responsible for breaking down waste materials within the cell.</li> <li>Transporting materials to the cell membrane for secretion.</li> </ol> Signup and view all the answers

<p>I apologize, but as a text-based AI, I cannot directly draw or provide images. However, I can describe the components of an animal cell for you to create a labeled diagram. A typical animal cell includes the cell membrane, cytoplasm, nucleus, endoplasmic reticulum, Golgi apparatus, ribosomes, lysosomes, mitochondria, and sometimes centrioles. The cell membrane is a thin, flexible barrier around the cell. The cytoplasm is a jelly-like substance inside the cell that contains the organelles. The nucleus is a control center that contains the cell's genetic material. The endoplasmic reticulum is a network of membranes that helps process proteins and lipids. The Golgi apparatus further packages and distributes these molecules. Ribosomes are responsible for assembling proteins. Lysosomes break down waste materials. Mitochondria, often called the powerhouses of the cell, create energy. And centrioles aid in cell division.</p> Signup and view all the answers

<p>i. Solubility of a solute in a solvent is influenced by several factors, including: a. Temperature: Generally, solubility increases with temperature. b. Pressure: Applying pressure to a solution can increase the solubility of a gas. c. Nature of the solute and solvent: Similar substances often mix more readily, whereas dissimilar ones tend to be less soluble. d. Stirring: Agitation or stirring can enhance the speed at which a solute dissolves. e. Particle size: Smaller particles of a solute dissolve faster. ii.<br /> a. Compounds are formed by chemically combining two or more elements in a fixed ratio. Compounds have distinct characteristic properties. b. Mixtures are a physical combination of two or more substances in variable proportions. Mixtures retain the individual properties of their components.</p> Signup and view all the answers

<p>i. The epidermis of the cell is replaced by a layer of cork cells that are produced by the cork cambium.<br /> ii. The cork acts as a protective tissue because it is made up of dead, compactly arranged cells with suberin deposition. This layer is waterproof and helps to prevent the loss of water.<br /> OR The main disadvantage of suberin deposition is that it makes the cells impermeable to water and gases, meaning that the plant cannot perform efficient gas exchange through this layer.</p> Signup and view all the answers

<p>i. The two types of fisheries based on the mode of obtaining fish are capture fisheries and culture fisheries. ii. Omega-3 fatty acids are found exclusively in fish. iii, Rohu is a bony fish. It is used in fin fisheries. OR Capture fisheries involve catching fish directly from natural habitats, like oceans or rivers. Culture fisheries, on the other hand, involve raising and cultivating fish in controlled environments, such as ponds or tanks.</p> Signup and view all the answers

<p>i. Solubility is defined as the maximum amount of solute that can dissolve in 100 grams of solvent at a given temperature to form a saturated solution. ii. The solubility of the solute is 4%. iii. A saturated solution becomes unsaturated when the temperature is increased or additional solvent is added. OR Concentration of a solution refers to the amount of solute present in a given amount of solution. It can be expressed in terms of mass by mass percentage, which is the mass of the solute divided by the mass of the solution multiplied by 100.</p> Signup and view all the answers

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