Science, Unit 1, Unit 2

 Unit - 1

Scientific Learning

Choose the appropriate word and fill in the blank:

smell, scientific, careful, observe, perceptual, taste

(a) Observations play an important role.

(b) Careful should be adopted in the laboratory.

(c) The chemicals in the laboratory are not perceptual and taste.

(d) External properties of events or objects can be known from observation.

Mark (√) if correct and (x) if incorrect:

(a) Observation is not necessary in the scientific learning process. √

(b) Experimentation is an integral part of the scientific learning process. x

(c) Do not trample indiscriminately in the laboratory. x

(d) After working in the laboratory, the equipment should be kept in the right place. x

Answer the following questions:

(a) What is scientific learning process?

👉 The scientific learning process refers to the systematic approach of acquiring knowledge and understanding of the natural world through scientific methods. It involves observing, questioning, experimenting, analyzing data, and drawing conclusions based on evidence.

(b) Why is observation necessary in scientific learning?

👉 Observation is necessary in scientific learning because it allows scientists to gather empirical data and information about the natural world. Through observation, scientists can make measurements, record phenomena, and collect data that serve as the foundation for scientific investigations and the formulation of hypotheses.

(c) Write the importance of experiment in scientific learning.

👉  The importance of experiments in scientific learning is manifold. Experiments enable scientists to test hypotheses, validate or refute theories, and gather empirical evidence to support their claims. They provide a controlled environment where variables can be manipulated and their effects observed, allowing for a deeper understanding of cause-and-effect relationships and the development of scientific knowledge.

(d) How does inquiry help scientific learning?

👉  Inquiry plays a crucial role in scientific learning as it promotes critical thinking, curiosity, and the exploration of scientific concepts. By engaging in inquiry-based learning, students and scientists actively ask questions, seek answers, and investigate phenomena. This process fosters a deeper understanding of scientific concepts and encourages the development of problem-solving skills, analytical thinking, and creativity.

(e) Write any four precautions to be taken while doing scientific experiments.

👉  Precautions to be taken while doing scientific experiments:

• Follow safety guidelines and protocols: Ensure you are familiar with and adhere to the safety procedures specific to the experiment and the laboratory environment.
• Wear appropriate protective gear: Use safety goggles, gloves, lab coats, and other necessary protective equipment to safeguard yourself from potential hazards.
• Handle chemicals and equipment with care: Be cautious when handling chemicals, fragile equipment, and sharp objects. Use proper techniques and ensure proper storage and disposal of materials.
• Control variables: Maintain control over variables to ensure accurate and reliable results. Keep track of and manipulate only the variables that are necessary for the experiment.

(f) You saw a new plant in your vegetable garden. of the said plant What do you do to know the quality?

👉 To determine the quality of the new plant in the vegetable garden, you can take the following steps:

• Observe the plant's physical characteristics: Look at the shape, color, size, and texture of the leaves, stems, and flowers of the plant.
• Research and compare: Use plant identification resources such as books, online databases, or consult with experts to compare the observed features of the plant with known plant species.
• Conduct tests: Perform tests such as a soil test to check the pH and nutrient content of the soil, or a simple spot test to identify specific compounds in the plant.
• Seek expert opinion: Consult with a botanist, horticulturist, or a local gardening expert who can help identify the plant and provide insights into its quality, potential uses, or any concerns.

(g) A beaker falls from Savina's hand while working in the science laboratory will break Now write what he should do.

👉  If a beaker falls from Savina's hand while working in the science laboratory and is likely to break, she should take the following actions:

• Prioritize safety: Ensure that there is no immediate danger to herself or others. If there is a risk of injury, she should move away from the broken glass and notify the laboratory supervisor or teacher.
• Handle broken glass safely: If it is safe to do so, Savina should carefully pick up the broken glass using gloves or other appropriate tools to avoid injuries. She should place the broken glass in a designated container for disposal.
• Notify the appropriate personnel: Savina should inform her laboratory supervisor or teacher about the incident, providing details about the broken beaker and any potential hazards.
• Clean up the area: If allowed and trained to do so, Savina should clean up the area where the beaker broke. She should use appropriate cleaning materials, such as a broom and dustpan or wet wipes, to remove any remaining glass shards or spills.
• Follow any additional protocols: Depending on the laboratory's specific procedures, Savina may need to fill out an incident report or take any other necessary actions as instructed by her laboratory supervisor or teacher.

5. Give short answers to the following questions:

(a) What is measurement?

(b) Write the meaning of measure.

(c) How is water measured?

(d) What is called a unit?

(b) Rama has water in two buckets of equal height. by his mother He asked which bucket has more water. Now how he Find out, write the process.

Answer 👉 (a) Measurement is the process of quantitatively determining the size, amount, or extent of something using a standardized system.

(b) Measure refers to determining the size, quantity, or degree of something using a specific unit or scale.

(c) Water can be measured using various units, such as liters, gallons, or cubic meters. Common methods include using measuring cups, graduated cylinders, or water meters.

(d) A unit is a standard quantity used for measurement, providing a reference point or scale for comparing and expressing the magnitude of different quantities.

To determine which bucket has more water, Rama can follow these steps:

1. Place both buckets on a level surface.
2. Use a measuring container, such as a measuring cup, to pour water from one bucket into the other. Make sure to pour slowly and carefully to avoid spillage or loss of water.
3. Keep track of the volume of water poured into each bucket by observing the measurements on the measuring container.
4. Once the water has been transferred, compare the measured volumes of water in each bucket.
5. The bucket with a higher measured volume of water has more water than the other bucket.

 Unit - 2

Information and Communication Technology

4. Give short answers to the following questions:

(a) Why is information necessary in daily life?

(b) How is information conveyed from one place to another?

(c) Name any four means of information and communication.

(d) Neha is in school. He had to call his mother to the school immediately So which media should be used, why?

(b) Explain how the use of information and communication facilitates daily work do it

Answer 👉

(a) Information is necessary in daily life because it helps us make informed decisions, understand the world around us, communicate effectively, learn new things, solve problems, and stay updated with current events and trends.

(b) Information is conveyed from one place to another through various means, such as verbal communication (speaking or phone calls), written communication (letters, emails, or text messages), visual communication (images or videos), and digital communication (internet or electronic devices).

(c) Four means of information and communication include:

Oral communication: Verbal exchange of information through speaking or conversations.

Written communication: Conveying information through written words, such as letters, books, newspapers, or documents.

Visual communication: Using visual elements like images, charts, or videos to communicate information.

Digital communication: Information exchange through electronic devices and online platforms, such as emails, social media, or video conferencing.

(d) Neha, who is in school and needs to call his mother immediately, can use a phone or a mobile device to make a phone call. This is because phone calls provide real-time communication, allowing for quick and direct contact with his mother, enabling immediate response and coordination.

(e) The use of information and communication facilitates daily work in several ways:

Efficient communication: It enables quick and effective exchange of information between individuals or teams, allowing for seamless coordination and collaboration.

Access to knowledge and resources: Information and communication technologies provide access to vast amounts of knowledge, resources, and data, enabling efficient research, problem-solving, and decision-making.

Streamlined workflows: Through digital tools and systems, information and communication can automate processes, streamline workflows, and improve productivity.

Global connectivity: Information and communication technologies connect people worldwide, facilitating global collaborations, business transactions, and cultural exchange.

Enhanced creativity and innovation: Access to diverse perspectives, ideas, and information fuels creativity, innovation, and problem-solving in daily work.

Improved information sharing and storage: Digital platforms and systems enable easy sharing, storage, and retrieval of information, enhancing organization and accessibility of data.

Remote work and flexibility: Information and communication technologies support remote work, allowing individuals to work from anywhere, increasing flexibility and work-life balance.

Computer

5.. Give short answers to the following questions:

(a) What is computer?

(b) What do you use a computer for?

(c) Name any two storage devices.

(d) Write the difference between monitor and keyboard.

(b) Write the names of the buttons on the mouse.

(f) Write any four functions of computer.

(g) Write any four methods of secure computer programming.

(h) Why should the computer be cleaned?

(i) How is computer cleaning done?

(j) What are the effects of not sitting correctly while using the computer?

(k) You have separate keyboard, monitor and CPU. You for yourself

How do you make a computer system?

(l) Write precautions to be taken while using mobile phones and computers.

Answer 👉 

(a) A computer is an electronic device that can process data, perform calculations, store and retrieve information, and execute various tasks based on instructions.

(b) Computers are used for various purposes, such as accessing the internet, creating and editing documents, playing games, watching videos, conducting research, communication, programming, data analysis, and much more.

(c) Two storage devices are hard disk drives (HDD) and solid-state drives (SSD).

(d) The monitor is the display device that shows visual output from the computer, while the keyboard is an input device used for typing and entering commands.

(b) The buttons on a mouse typically include the left button, right button, and scroll wheel.

(f) Four functions of a computer are data processing, storage of information, communication, and execution of tasks or applications.

(g) Four methods of secure computer programming include input validation, data encryption, secure coding practices, and regular software updates.

(h) Computers should be cleaned to remove dust, dirt, and debris that can accumulate on the components, affecting performance, causing overheating, and potentially damaging the hardware.

(i) Computer cleaning can be done by using compressed air to blow away dust, wiping the surfaces with a soft cloth, cleaning the keyboard with a brush or compressed air, and ensuring proper ventilation for cooling.

(j) Not sitting correctly while using a computer can lead to various effects such as neck and back strain, eye strain, poor posture, repetitive strain injuries (RSI), and musculoskeletal disorders.

(k) To make a computer system, you need to connect the separate keyboard, monitor, and CPU. Connect the keyboard and monitor to the appropriate ports on the CPU (central processing unit), typically using USB or other specific connectors. Then, power on the computer and ensure proper connectivity between the components.

(l) Precautions while using a mobile phone and computer include:

Set and follow screen time limits to avoid excessive usage.

Use strong and unique passwords or biometric authentication methods to protect your devices and accounts.

Install and regularly update antivirus and security software to protect against malware and online threats.

Be cautious while downloading or clicking on links to avoid malicious software or phishing attacks.

6. Give reasons:

(a) A computer is called a smart machine.

(b) Keyboard is called an input device.

(c) The system unit is called the brain of the computer.

Answer 👉 

a) A computer is called a smart machine because it can perform complex tasks, process vast amounts of data quickly, learn from patterns and make intelligent decisions, and adapt to changing situations. It can execute various applications and programs, communicate with other devices, and provide advanced functionalities that enhance productivity and efficiency.

(b) The keyboard is called an input device because it allows the user to input information, commands, and text into the computer. It serves as a primary means of data entry, enabling users to type letters, numbers, symbols, and perform various functions such as shortcuts and commands. The keyboard transfers the input data to the computer for processing and execution.

(c) The system unit is called the brain of the computer because it contains the central processing unit (CPU), which is responsible for executing instructions, performing calculations, and controlling the overall operation of the computer. Similar to the brain in the human body, the CPU processes and interprets data, coordinates the functions of other components, and handles the logical and computational tasks required by the computer system.

3. Answer the following questions:

(a) What is Internet? Write the importance of internet.

(b) How to get the audio, video, image, information you want from the Internet

Can it be done?

(c) Internet has become an integral tool of learning. This statement with an example

make it clear

Answer 👉 

(a) The internet is a global network of interconnected computers and devices that enables communication, information sharing, and access to a vast amount of resources and services. It allows users to connect, communicate, and exchange data across the globe.

The importance of the internet is manifold:

Access to information: The internet provides instant access to a vast amount of information, resources, and knowledge, enabling research, learning, and staying updated with current events.

Communication: It facilitates real-time communication through email, messaging, video conferencing, and social media platforms, connecting people across the world.

Collaboration: The internet enables collaboration and teamwork through shared documents, online platforms, and virtual meetings, enhancing productivity and efficiency.

E-commerce and online services: The internet has transformed commerce, allowing online shopping, banking, booking services, and accessing various online platforms and services.

Entertainment and media: It offers a wide range of entertainment options, including streaming services, online gaming, social media, and access to multimedia content.

Global connectivity: The internet bridges geographical barriers, connecting people from different cultures and backgrounds, fostering cultural exchange and global connectivity.

(b) To get audio, video, images, and information from the internet, you can use various methods:

Search engines: Use search engines like Google, Bing, or Yahoo to search for specific keywords, topics, or media files.

Websites and platforms: Visit websites, online platforms, or content hosting sites dedicated to audio, video, images, or information, and browse or search within those platforms.

Online databases and libraries: Access online databases, digital libraries, or archives that offer audio, video, image, or information resources.

File-sharing platforms: Utilize file-sharing platforms, such as Dropbox or Google Drive, to download or share files that contain the desired media or information.

Yes, it is possible to retrieve and access audio, video, images, and information from the internet through these methods and tools.

(c) The internet has indeed become an integral tool for learning. For example, students can access educational websites, online courses, virtual libraries, and educational resources available on the internet. They can participate in remote learning, engage in collaborative projects, interact with educators and peers, and access a vast array of educational materials, research papers, and multimedia resources. The internet provides opportunities for self-paced learning, global connectivity, and access to diverse perspectives, enhancing the learning experience and enabling lifelong learning.