تلخيص شامل علوم منهج انجليزي صف سادس

الصف الصف السادس
الفصل علوم الصف السادس
المادة علوم سادس الفصل الاول
حجم الملف 7.68 MB
عدد الزيارات 40
تاريخ الإضافة 2020-06-29, 22:04 مساء

تلخيص شامل علوم منهج انجليزي صف سادس : نقدم اليكم في هذا الملف تلخيصا شاملا ، من منهج العلوم  الصف السادس ،و قد تم تصميم هذا الملف لمساعدة طلابنا الاعزاء، في دراستهم و تحضيرهم للامتحان النهائي بشكل متكامل

 

Chapter 2 : Technology and the Design Process

 Tools of Technology

 Technology is the application of

scientific knowledge to benefit people

 A resource is a source of supply or

support. Technological resources include

People - information - tools machines - capital -

time materials - energy • A skill is an ability you develop when

you combine knowledge and practice in order to perform an activity well

 

Chapter 2 : Technology and the Design Process

 Tools of Technology

 A tool is a device that increases the

ability to do work. A machine is a device that makes doing work easier. Capital is money, credit, property, or accumulated wealth 

 Materials used to make products are called engineering materials or production materials. Energy is the ability to cause change

 

Chapter 2 : Technology and the Design Process

Lesson 2.2 Materials and Their Properties

 A physical property is a characteristi that can be observed or measured without changing the identity of the material

 A chemical property is the ability or inability of a substance to combine with or change into one or more new substances

 

Chapter 2 : Technology and the Design Process

  Materials and Their Properties • Mechanical properties are characteristics that determine how a material reacts to forces 

• Strength

• Elasticity

• Hardness

 • Flexibility

 

Chapter 2 : Technology and the Design Process

2.1 Tools of Technology

 Technology is the application of scientific knowledge to benefit people

A resource is a source of supply or

support. Technological resources include People - information - tools machines - capital - time materials - energy 

 A skill is an ability you develop when you combine knowledge and practice in order to perform an activity well

 

Chapter 2 : Technology and the Design Process

2.1 Tools of Technology

 A tool is a device that increases the ability to do work. A machine is a device that makes doing work easier. Capital is money, credit, property, or accumulated wealth

 Materials used to make products are called engineering materials or production materials. Energy is the ability to cause change

 

Chapter 2 : Technology and the Design Process Lesson

2.2 Materials and Their Properties

 Polymers are natural or manufactured materials composed of long chains of small, repeating molecules called monomers. Proteins are an example of a natural polymer

A composite material is a mixture of two or more materials one layered in the other

 

Chapter 2 : Technology and the Design Process

2.2 Materials and Their Properties  An alloy is a mixture of two or more metals. Alloys are used when the properties of a metal need to be improved for an application

  Ceramics are made from dried clay or clay-like materials

 

Chapter 2 : Technology and the Design Process Lesson

2.3 The Design Process

  A problem statement is a statement that clearly defines a problem to be solved

 Criteria are the standards by which the product will be evaluated

 Constraints are limitations put on the design of the product from outside factors such as cost, efficiency, environmental impact, or availability of materials

 

Chapter 2 : Technology and the Design Process

2.3 The Design Process

 Brainstorming is a problem - solving technique that involves individuals contributing ideas without the fear of being criticized • A Pugh Chart is a method used to compare options or solutions

 A prototype is a full-scale model that is used to test a new product

 

Chapter 2 : Technology and the Design Process

2.4 Technology Systems

 A system is a group of parts that work together in an organized way

 Subsystems are smaller systems that exist within larger systems

When a system has no way to measure or control its product, the system is called an open-loop system

 

Chapter 2 : Technology and the Design Process

2.4 Technology Systems

 Input is the resources, ideas, and activities that determine what needs to be accomplished

 A process is the conversion of ideas or activities into products by using machines and labor

 Output is what the system produces

Energy, Work, and Simple Machines

 

Kinetic Energy

 Kinetic energy is the energy an object has because it is in motion

 Anything that is in motion has kinetic energy, including large objects that you can see as well as small particles, such as molecules, ions, atoms, and electrons

Energy, Work, and Simple Machines

 

Kinetic Energy cont

 Electrons move around the nucleus of an atom, and they can move from one atom to another

When electrons move, they have kinetic energy and create an electric current. The energy that an electric current carries is a form of kinetic energy called electric energy Energy, Work, and Simple Machines

 

Potential Energy

 Potential energy is stored energy that depends on the interaction of objects, particles, or atoms 

Gravitational potential energy is a type of potential energy stored in an object due to its height above Earth's surface

Energy, Work, and Simple Machines

 

Potential Energy cont

 Gravitational potential energy depends on the mass of an object and its distance from Earth's surface 

The more mass an object has and the greater its distance from Earth, the greater its gravitational potential energy

Energy, Work, and Simple Machines

 

Potential Energy cont

 A drawback of fossil fuels is that they introduce harmful waste products, such as sulfur dioxide and carbon dioxide, into the environment 

 Scientists are searching for replacement fuels that do not harm the environment Energy, Work, and Simple Machines

 

Potential Energy cont

 Chemical energy also is stored in the foods you eat 

 Your body converts the energy stored in chemical bonds in food into the kinetic energy of your moving muscles and into the electric energy that sends signals through your nerves to your brain

 

Energy, Work, and Simple Machines Kinetic and Potential Energies Combined

Objects such as wind turbine blades and particles, such as molecules, ions, atoms, and electrons, often have kinetic and potential energies

Energy, Work, and Simple Machines

Kinetic and Potential Energies

 

Combined cont

 The sum of potential energy and kinetic energy in a system of objects is mechanical energy

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