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Questions and Answers
What type of fault occurs when the Earth's crust is being pulled apart due to tension stress?
What is the part of a typhoon with the lowest air pressure?
What is the term for the energy stored in an object when it is in motion?
What is the term for the type of cell division that results in four daughter cells?
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What is the instrument used to measure wind speed?
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What is the term for the tendency of an object to resist changes in its motion?
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What is the relationship between the acceleration of an object and the net force applied to it, according to the 2nd Law of Motion?
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What is the primary difference between a physical change and a chemical change?
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How does the speed of sound in air change when the temperature decreases?
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What is the characteristic of a parallel circuit?
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Study Notes
Inertia and Motion
- Inertia is the tendency of objects to resist changes in their motion.
- Acceleration is the rate of change of velocity with respect to time.
- Net force is the sum of all forces acting on an object.
- Friction is the resistance that one surface or object encounters when moving over another.
Laws of Motion
- 1st Law of Motion (Inertia): an object at rest will remain at rest, and an object in motion will stay in motion, unless acted upon by an external net force.
- 2nd Law of Motion (Acceleration): the acceleration of an object is directly proportional to the net force applied and inversely proportional to its mass.
- 3rd Law of Motion (Interaction): when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction.
Physical and Chemical Changes
- Physical change: a change in appearance of matter without changing its chemical composition (e.g., freezing: change from liquid to solid).
- Chemical change: a change in matter that forms a new substance.
Energy and Speed
- Types of energy: kinetic energy (stored when an object is in motion) and potential energy (stored when an object is at rest).
- Kinetic energy is affected by mass and velocity.
- Speed of sound in air: 346 m/s at a certain temperature, decreasing with decreasing temperature.
- Speed of sound varies between cold and hot places, traveling faster in hot places and slower in cold places.
Electricity and Circuits
- Series circuit: a type of circuit that has two or more loads, but current flows through a single conducting loop.
- Parallel circuit: a type of circuit that has two or more paths for current to flow through.
Biology and Earth Sciences
- Small intestine: has the most important role in nutrient absorption.
- Kidney: organ responsible for excretion, where nitrogenous and metabolic wastes are expelled from the body.
- Mitosis: type of cell division where a single cell divides into two identical daughter cells.
- Meiosis: type of cell division where a single cell divides into four different daughter cells.
- Earthquake: a sudden shaking of the ground.
- Normal fault: the crust is being pulled apart, caused by tension stress.
Weather and Storms
- Typhoon: an intense circular storm that originates over warm tropical oceans.
- North West: the direction of typhoon in the Philippines.
- PAR (Philippine Area of Responsibility): the area monitored by meteorologists who study weather disturbances.
- Anemometer: an instrument used to measure wind speed.
- Eye: part of the typhoon with the lowest air pressure.
- Eyewall: part of the typhoon with extreme air pressure.
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Description
Test your understanding of the laws of motion, including inertia, acceleration, and friction, as well as the concept of net force and the interaction between objects. This quiz covers the fundamental principles of physics.
