ELEMENTARY SCIENCE FACTS & REVIEWERS

 SIMPLE MACHINES Title: Exploring the Marvels of Simple Machines: Making Work Easier! by Pj Miana Introduction: In the world of science, there are extraordinary tools that help us accomplish tasks with ease. These tools are called simple machines, and they are the unsung heroes behind many of the everyday actions we take for granted. From opening a door to riding a bike, simple machines play a crucial role in our lives. Let's embark on a fascinating journey to unravel the mysteries of these incredible devices! What are Simple Machines? Simple machines are fundamental mechanical devices that make work easier by either changing the direction or magnitude of a force. They are the building blocks of more complex machinery and are classified into six main types: the lever, inclined plane, wheel and axle, pulley, wedge, and screw. Each type operates on a basic principle and can be found in various forms across the world. 1. The Lever: The lever is one of the most common and versatile s

SCIENCE QUIZ NO. 4: ENERGY, ENERGY TYPES & ENERGY TRANSFER   TEST I. Write the letter and the text of the correct answer. 1. Which of the following is a renewable source of energy?    a) Coal    b) Wind    c) Natural Gas    d) Petroleum   2. What type of energy is stored in food?    a) Chemical energy    b) Thermal energy    c) Mechanical energy    d) Nuclear energy   3. When you turn on a lamp, what type of energy transformation occurs?    a) Mechanical to electrical    b) Chemical to thermal    c) Electrical to light    d) Light to sound   4. Which of the following is an example of potential energy?    a) A moving car    b) A stretched rubber band    c) A burning candle    d) A running faucet   5. Solar panels convert sunlight into what type of energy?    a) Mechanical energy    b) Chemical energy    c) Electrical energy    d) Thermal energy   6. What type of energy does a battery store?    a) Electrical energy

  Exploring the Transformation of Energy: Sound, Heat, Light, and Electricity By: Pj Miana   Introduction: Energy is all around us, and it can take many forms. In this lesson, we'll delve into how different types of energy—sound, heat, light, and electricity—can be transformed from one form to another. Understanding these transformations helps us comprehend the world and the technology we use every day.   1. Sound Energy: Sound energy is produced by vibrations traveling through a medium, such as air, water, or solids. It can be transformed in various ways:   - Mechanical to Sound : When an object vibrates, it creates sound waves. For example, when you pluck a guitar string, the mechanical energy of your hand's motion is transformed into sound energy.   - Sound to Electrical : Microphones transform sound waves into electrical signals. These signals can then be amplified and converted back into sound through speakers.   2. Heat Energy: Heat energy is

 [Q3] FRICTION, TYPES OF FRICTION QUIZ . [Q3] FRICTION, TYPES OF FRICTION QUIZ Multiple Choice Test: Friction and Types of Friction   Direction: Write the letter and the text of the correct answer 1. What is the force that opposes the motion of objects in contact?      a. Magnetism     b. Gravity      c. Friction      d. Air pressure   2. Which type of friction occurs when an object is already in motion?      a. Static friction     b. Kinetic friction      c. Rolling friction      d. Fluid friction   3. What does static friction prevent?      a. Acceleration     b. Sliding motion      c. Rolling motion      d. Both a and b   4.Why do your shoes provide traction when walking?       a. Due to air resistance      b. Due to magnetic forces      c. Due to rolling friction      d. Due to static friction   5.Which type of friction occurs when a wheel rolls over a surface?      a. Kinetic friction     b. Static friction      c. Rolling

[Q3] FRICTION AND GRAVITY QUIZ 1 Direction: Write the letter and the text of the correct answer.   ________________ 1. What is friction?    a) A type of energy    b) A force between two surfaces in contact    c) The speed of an object    d) The sound produced when objects rub together   2. Which of the following is an example of high friction?    a) Sliding down a slide    b) Dragging a toy car across sandpaper    c) Rolling a ball on ice    d) Gliding on a smooth floor   3. In what way can friction be helpful?    a) By making objects slide easily    b) By slowing down or stopping moving objects    c) By increasing surface roughness    d) By reducing the gravitational pull   4. What is the role of friction in braking on a bicycle?    a) It speeds up the bicycle    b) It prevents the bicycle from moving    c) It helps slow down the bicycle    d) It has no effect on the bicycle's movement   5. Which of the following is an example of g

Notes on Friction and Gravity  BY: Pj Miana Friction:   1. Definition: Friction is a force that occurs when two surfaces rub against each other.   2. Examples:    - Sliding down a slide at the playground.    - Dragging a toy car across the floor.   3. Nature of Friction:    - Friction can be helpful or challenging, depending on the situation.    - Smooth surfaces (like ice) have low friction, making objects slide easily.    - Rough surfaces (like sandpaper) have high friction, making it harder for objects to slide.   4. Role of Friction:    - Slows down or stops moving objects.    - Can be useful, like when using brakes on a bicycle.    - Influences the ease of sliding and movement.   Gravity:   1. Definition: Gravity is a force that pulls objects towards each other, especially towards the center of the Earth.   2. Examples:    - Objects falling to the ground (e.g., a ball rolling down a hill).    - Leaves falling from trees.   3.

[Q2] SCIENCE LONG QUIZ & Q2 REVIEWER Direction: Write the letter and the text of the correct answer. Write them on your test notebook. 1. What is the primary function of the respiratory system?    A. Pump blood throughout the body    B. Break down food for energy    C. Exchange oxygen and carbon dioxide    D. Support and move the body 2. Which system is responsible for protecting the body from external harm, such as cuts and infections?    A. Digestive system    B. Integumentary system    C. Circulatory system    D. Musculo-skeletal system 3. What is the main role of the digestive system?    A. Control body movements    B. Filter waste from the blood    C. Break down food for nutrients    D. Transmit electrical signals in the body 4. Which two systems work together to provide oxygen to the body's cells and remove waste products?    A. Musculo-skeletal and circulatory systems    B. Nervous and respiratory systems    C. Digestive and excretory