Science 7 - Quarter 3 Topics (PDF)

Science THIRD QUARTER SY 2024-2025 CONTENTS CONTENTS 1. Balanced and Unbalanced Forces 2. Motion: Displacement and Velocity 3. Distance-Time graphs 4. Identifying and Controlling Variables 5. Heat Transfer  CONTENT STANDARDS 1. Scientists and engineers analyze forces to predict their effects o...

Science THIRD QUARTER SY 2024-2025 CONTENTS CONTENTS 1. Balanced and Unbalanced Forces 2. Motion: Displacement and Velocity 3. Distance-Time graphs 4. Identifying and Controlling Variables 5. Heat Transfer  CONTENT STANDARDS 1. Scientists and engineers analyze forces to predict their effects on movement. 2. Vectors: differentiate the concepts of speed and velocity. 3. Graphing motion provides more accurate predictions about speed and velocity. 4. The particle model explains natural systems and processes. 5. Scientists and engineers conduct innovative research to find solutions to the current global energy crisis by seeking renewable energy solutions.  LEARNING COMPETENCIES 1. identify that forces act between objects and can be measured 2. identify and describe everyday situations that demonstrate: a. balanced forces such as a box resting on an inclined plane, a man standing still, or an object moving with constant velocity; b. unbalanced forces, such as freely falling fruit or an accelerating car;  LEARNING COMPETENCIES 3. draw a free-body diagram to represent the relative magnitude and direction of the forces involving balanced and unbalanced forces; 4. identify that when forces are not balanced, they can cause changes in the object’s speed or direction of motion; 5. explain the difference between distance and displacement in everyday situations in relation to a reference point; 6. distinguish between speed and velocity using the concept of vectors;  LEARNING COMPETENCIES 7. describe uniform velocity and represent it using distance-time graphs; 8. explain the difference between heat and temperature; 9. identify advantageous and disadvantageous examples of conduction, convection, and radiation; 10. explain in terms of the particle model the processes underlying convection and conduction of heat energy; and 11. gather information from secondary sources to identify and describe examples of innovative devices that can be used to transform heat energy into electrical energy.  FORCE & INTERACTION FORMATIVE ASSESSMENT TRUE OR FALSE 1. Gravitational force is a type of contact force. 2. Frictional force always acts in the opposite direction of motion. 3. Tension force is a non-contact force. 4. Air resistance is a type of contact force. 5. Buoyant force is responsible for objects floating in water. FORMATIVE ASSESSMENT 6. Electromagnetic force can act over a distance without physical contact. 7. The normal force is a contact force that acts perpendicular to the surface of contact. 8. An applied force is a non-contact force. 9. Spring force, or restoring force, only acts when an object is at rest. 10. Gravitational force decreases as the distance between two objects increases. FORMATIVE ASSESSMENT 11-17. What are the types of contact forces and its symbols? 18-19. What are the types of non-contact forces and its symbols? 20. What is force? FORMATIVE ASSESSMENT IDENTIFY THE FORCES ACTING ON THE OBJECT AND DRAW FREE-BODY DIAGRAM. 1. Kicking a soccer ball 2. Pushing a shopping cart 3. Falling debris from the building 4. A motorboat traveling to an island 5. A bicycle moving at a constant speed FORMATIVE ASSESSMENT TRUE OR FALSE 1. False 6.True 2.True 7.True 3.False 8.False 4.True 9.False 5.True 10.True MOTION: DISTANCE & DISPLACEMENT LEARNING COMPETENCY 1. Explain the difference between distance and displacement in everyday situations in relation to a reference point; Lesson Objective: Describe the motion of an object in terms of distance and displacement WHAT IS THE DIFFERENCE BETWEEN SCALAR AND VECTOR QUANTITIES? DISTANCE VS DISPLACEMENT MOTION IS RELATIVE. An object is moving or in motion, depending on the reference point. When the object's position changes with respect to a particular reference point within a given time period, the object is in motion. DISPLACEMENT DISTANCE VS DISPLACEMENT DISTANCE VS DISPLACEMENT FORMATIVE ASSESSMENT MOTION: SPEED & VELOCITY LEARNING COMPETENCY 2. Distinguish between speed and velocity using the concept of vectors; Lesson Objective 1: Differentiate speed from velocity and solve problems involving speed and velocity Which of the following animals: dog, cheetah, and lion, travel the fastest? Cheetah can accelerate from 0 to 60 miles per hour in less than three seconds and reach speeds of up to 75 miles per hour. What is the fastest animal in the Philippines? Peregrine falcon Tamaraw Philippine Eagle The fastest animal found in the Philippines is the peregrine falcon (Falco peregrinus). The peregrine falcon is considered the fastest member of the animal kingdom and can reach speeds of up to 390 kilometers per hour (242 miles per hour) when diving after prey. THINK OF THIS! How do you usually describe motion and movement of an object?  SPEED - Speed is a scalar quantity. - It is a measure of how fast something is moving. - It is the rate at which distance is covered. The word rate is a clue that something is being divided by time. - Speed is defined as the distance covered per unit time.  VELOCITY - Velocity is a vector quantity. - It describes how fast and in which way (speed + direction) an object is moving. - It can be negative or positive depending on the direction of motion. SAMPLE PROBLEMS  SPEED VS VELOCITY 1. How are speed and velocity similar? They both measure how fast something is moving 2. How are speed and velocity different? Velocity includes the direction of motion and speed does not (the car is moving 5mph East) 3. Is velocity more like distance or displacement? Why? Displacement, because both are vectors which include an amount and a direction. MOTION: DISTANCE- TIME GRAPH  Graph is a visual representation of the object’s motion. It shows how far the object has traveled at a given time or how fast the object moves. The direction can also be specified if the graph is displacement vs. time graph (or position vs. time graph). GRAPHING MOTION  THE STEEPNESS OF A LINE ON A GRAPH IS CALLED SLOPE. The steeper the slope is, the greater the speed. A constant slope represents motion at constant speed. Using the points shown, the rise is 400 meters and the run is 2 minutes. To find the slope, you divide 400 meters by 2 minutes. The slope is 200 meters per minute. (s) (s)  HEAT TRANSFER  HEAT VS TEMPERATURE HEAT VS TEMPERATURE HEAT TRANSFER HEAT TRANSFER