Gr. 8- Mechanical Systems: UNIT FINAL

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28 questions

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Gr. 8- Mechanical Systems: UNIT FINAL

Last updated 7 days ago

28 questions

             1.1 Simple Machines – Meeting Human Needs

1

                 1.2 The Complex Machine – A Mechanical Team

1

                         2.1 Machines Make Work Easier

1

                                   2.2 The Science of Work

1

                             2.3 The Big Movers - Hydraulics

1

                           3.1 Evaluating Mechanical Devices

1

              3.2 Technology Develops through Change

1

             1.1 Simple Machines – Meeting Human Needs

Mechanical systems for transporting water were developed by Roman engineers thousands
of years ago. These systems supplied water to cities that were many kilometers from the
water supply. The systems were known as ...

sakias

aqueducts

mill wheels

Persian wheels

Archimedes designed a system for moving water from one place to another. His machine is
still used today. It is based on the simple machine - the ...

lever

wedge

screw

inclined plane

Scissors are a combination of what two machines?

lever and wedge

lever & inclined plane

wheel and axle

wedge and inclined plane

A simple machine that converts rotational motion to linear motion is called ...

Class 1 lever

Inclined plane

Wedge

Screw

A simple machine, similar in shape to the inclined plane, but used to increase the force of
moving an object is the ...

Class 1 lever

Screw

Wheel and axle

Wedge

Simple machines can be used for 4 different purposes. The purpose of scissors is to ...

Transfer the force

Multiply the force

Increase or decrease the speed

Change the direction of a force

                 1.2 The Complex Machine – A Mechanical Team

The penny farthing was an early bicycle design that used only these types of simple
machines ...

Levers and pulleys

Incline plane & Screw

Levers & wheel and axle

Pulleys & wheel and axle

Devices that help that are made up of several simple machines are called complex
machines. Because all the simple machines work together in these devices, they are
considered to be a ...

system

subsystem

new technology

complicated device

Linkages and transmissions are parts of a system that perform a specific function. The
function they perform is to ...

increase torque

increase speed

transfer weight

transfer force

Transmissions are special types of linkages. It is used to transfer energy from the engine to
the wheels in a car. A transmission contains a number of these that allow the driver to apply
a large force to move objects slowly or a small force to move objects quickly. They are ...

chains

fan belts

gears

linkages

Gears can also change the direction of motion. In an eggbeater, the crank turns the driving
gear, which in turn makes the beaters rotate. The transfer of motion is ...

vertical to horizontal

horizontal to vertical

linear to rotational

rotational to linear

If a smaller gear is used to drive a larger gear, the gear train is a reducing gear. If a larger
gear is used to turn a smaller gear, the gear train is a ...

parallel gear

multiplying gear

linear gear

rotational gear

On a bicycle, gears are made up of flat, toothed disks called ...

linkages

sprockets

pinions

spokes

                         2.1 Machines Make Work Easier

What accounts for mechanical advantage and speed ratio being different in real situations?

Improper calculations

Faulty equipment

Force of friction

Loss of energy

Mechanical advantage is the amount by which a machine can multiply a force. The force
that the machine applies to the object is called the ...

input force

output force

force ratio

Newton force

Roads in the mountains have sections to help vehicles up a steep incline, by making sharp
turns back and forth in opposite directions, after raising the vehicle a little higher in altitude.
These roads are an example of a simple machine – the inclined plane, and are called ...

zig zags

reversals

turnabouts

switchbacks

Speed Ratio is calculated by dividing the ...

Output distance by the input distance

Input distance by the output distance

Output force by the input distance

Input force by the output distance

                                   2.2 The Science of Work

The scientific definition of work is ... “Work is done when a force acts on an object to make the object move.” Which statement below describes work being done.

Hank worked very hard to get all his homework done.

Doing math is hard work if you don’t like numbers.

It was hard work for Sam to move the desk two meters.

It was hard work trying to move the car, but it wouldn’t budge.

Crash test dummies are used to test safety in vehicles. The main reason for this is because they are...

inexpensive to use

realistic

easily repaired

non-living

                             2.3 The Big Movers - Hydraulics

Pneumatic systems use air and are used in many different applications. Dentists would use pneumatics in their office to do this ...

run the tooth drill

run the amalgum mixer

operate x-ray machine

raise and lower the chair

                           3.1 Evaluating Mechanical Devices

Opening a can has evolved from the earliest cans which were made from iron in 1810. These cans were opened by using a ...

church key

push button

removable tab

hammer and chisel

The design and development of opening mechanisms for aluminum cans went through four distinct designs. To get the liquid out of the can you need one large hole or two smaller holes. If two holes are needed, the first is designed to let air into the can, and the second hole is designed to ...

create pressure

 restrict the flow

let the fluid out

be just for show

Another simple machine was built into the removable tab top. It consisted of a small ring that acted like a lever and would make the necessary hole by removing the tab from the can. This was a huge improvement, but it also created a huge problem. The problem it created was ...

scientific

environmental

industrial

commercial

CSA is a non-government association that tests and approves a wide range of products to ensure they are safe for use by the consumer. CSA stands for ...

Consumers Sitting Around

Canadian Secret Agency

Canadian Standards Association

              3.2 Technology Develops through Change

A particle accelerator is a huge complex machine that does this ...

creates new particles

breaks up atoms

makes new elements

creates space in particles

Sometimes a new device is designed when someone who thinks there can be an easier way to do something makes an observation. An inventor observed a driver manually cleaning snow and ice off the windshield of a streetcar in freezing cold weather, this observation prompted the invention of this ...

windshield heater

windshield washer

windshield wiper

windshield defroster

New technologies often develop from scientific research that seems to be unrelated. Particle accelerator research experiments led to the technology behind trains powered by electricity and magnets. These trains ‘float’ on the tracks. They are known as ...

MAGIC

MALLING

MARVELOUS

MAGLEV

Robots are extremely complex devices and vary widely in appearance, depending on the job they are designed to do. A simple robot however has some or all of these basic parts: body, motor devices, power source, sensors, output devices, and microprocessors. Spirit and Opportunity are robot rovers on the planet Mars. The solar panel on a robot is an example of this basic part ...

Motor devices

Sensors

Power source

Microprocessors

Mechanical systems for transporting water were developed by Roman engineers thousands
of years ago. These systems supplied water to cities that were many kilometers from the
water supply. The systems were known as ...

sakias

aqueducts

mill wheels

Persian wheels

Archimedes designed a system for moving water from one place to another. His machine is
still used today. It is based on the simple machine - the ...

lever

wedge

screw

inclined plane

Scissors are a combination of what two machines?

lever and wedge

lever & inclined plane

wheel and axle

wedge and inclined plane

A simple machine that converts rotational motion to linear motion is called ...

Class 1 lever

Inclined plane

Wedge

Screw

A simple machine, similar in shape to the inclined plane, but used to increase the force of
moving an object is the ...

Class 1 lever

Screw

Wheel and axle

Wedge

Simple machines can be used for 4 different purposes. The purpose of scissors is to ...

Transfer the force

Multiply the force

Increase or decrease the speed

Change the direction of a force

The penny farthing was an early bicycle design that used only these types of simple
machines ...

Levers and pulleys

Incline plane & Screw

Levers & wheel and axle

Pulleys & wheel and axle

Devices that help that are made up of several simple machines are called complex
machines. Because all the simple machines work together in these devices, they are
considered to be a ...

system

subsystem

new technology

complicated device

Linkages and transmissions are parts of a system that perform a specific function. The
function they perform is to ...

increase torque

increase speed

transfer weight

transfer force

Transmissions are special types of linkages. It is used to transfer energy from the engine to
the wheels in a car. A transmission contains a number of these that allow the driver to apply
a large force to move objects slowly or a small force to move objects quickly. They are ...

chains

fan belts

gears

linkages

Gears can also change the direction of motion. In an eggbeater, the crank turns the driving
gear, which in turn makes the beaters rotate. The transfer of motion is ...

vertical to horizontal

horizontal to vertical

linear to rotational

rotational to linear

If a smaller gear is used to drive a larger gear, the gear train is a reducing gear. If a larger
gear is used to turn a smaller gear, the gear train is a ...

parallel gear

multiplying gear

linear gear

rotational gear

On a bicycle, gears are made up of flat, toothed disks called ...

linkages

sprockets

pinions

spokes

What accounts for mechanical advantage and speed ratio being different in real situations?

Improper calculations

Faulty equipment

Force of friction

Loss of energy

Mechanical advantage is the amount by which a machine can multiply a force. The force
that the machine applies to the object is called the ...

input force

output force

force ratio

Newton force

Roads in the mountains have sections to help vehicles up a steep incline, by making sharp
turns back and forth in opposite directions, after raising the vehicle a little higher in altitude.
These roads are an example of a simple machine – the inclined plane, and are called ...

zig zags

reversals

turnabouts

switchbacks

Speed Ratio is calculated by dividing the ...

Output distance by the input distance

Input distance by the output distance

Output force by the input distance

Input force by the output distance

The scientific definition of work is ... “Work is done when a force acts on an object to make the object move.” Which statement below describes work being done.

Hank worked very hard to get all his homework done.

Doing math is hard work if you don’t like numbers.

It was hard work for Sam to move the desk two meters.

It was hard work trying to move the car, but it wouldn’t budge.

Crash test dummies are used to test safety in vehicles. The main reason for this is because they are...

inexpensive to use

realistic

easily repaired

non-living

Pneumatic systems use air and are used in many different applications. Dentists would use pneumatics in their office to do this ...

run the tooth drill

run the amalgum mixer

operate x-ray machine

raise and lower the chair

Opening a can has evolved from the earliest cans which were made from iron in 1810. These cans were opened by using a ...

church key

push button

removable tab

hammer and chisel

The design and development of opening mechanisms for aluminum cans went through four distinct designs. To get the liquid out of the can you need one large hole or two smaller holes. If two holes are needed, the first is designed to let air into the can, and the second hole is designed to ...

create pressure

 restrict the flow

let the fluid out

be just for show

Another simple machine was built into the removable tab top. It consisted of a small ring that acted like a lever and would make the necessary hole by removing the tab from the can. This was a huge improvement, but it also created a huge problem. The problem it created was ...

scientific

environmental

industrial

commercial

CSA is a non-government association that tests and approves a wide range of products to ensure they are safe for use by the consumer. CSA stands for ...

Consumers Sitting Around

Canadian Secret Agency

Canadian Standards Association

A particle accelerator is a huge complex machine that does this ...

creates new particles

breaks up atoms

makes new elements

creates space in particles

Sometimes a new device is designed when someone who thinks there can be an easier way to do something makes an observation. An inventor observed a driver manually cleaning snow and ice off the windshield of a streetcar in freezing cold weather, this observation prompted the invention of this ...

windshield heater

windshield washer

windshield wiper

windshield defroster

New technologies often develop from scientific research that seems to be unrelated. Particle accelerator research experiments led to the technology behind trains powered by electricity and magnets. These trains ‘float’ on the tracks. They are known as ...

MAGIC

MALLING

MARVELOUS

MAGLEV

Robots are extremely complex devices and vary widely in appearance, depending on the job they are designed to do. A simple robot however has some or all of these basic parts: body, motor devices, power source, sensors, output devices, and microprocessors. Spirit and Opportunity are robot rovers on the planet Mars. The solar panel on a robot is an example of this basic part ...

Motor devices

Sensors

Power source

Microprocessors

Gr. 8- Mechanical Systems: UNIT FINAL

Gr. 8- Mechanical Systems: UNIT FINAL

1.1 Simple Machines – Meeting Human Needs

1.2 The Complex Machine – A Mechanical Team

2.1 Machines Make Work Easier

2.2 The Science of Work

2.3 The Big Movers - Hydraulics

3.1 Evaluating Mechanical Devices

3.2 Technology Develops through Change

1.1 Simple Machines – Meeting Human Needs

Mechanical systems for transporting water were developed by Roman engineers thousandsof years ago. These systems supplied water to cities that were many kilometers from thewater supply. The systems were known as ...

Archimedes designed a system for moving water from one place to another. His machine isstill used today. It is based on the simple machine - the ...

Scissors are a combination of what two machines?

A simple machine that converts rotational motion to linear motion is called ...

A simple machine, similar in shape to the inclined plane, but used to increase the force ofmoving an object is the ...

Simple machines can be used for 4 different purposes. The purpose of scissors is to ...

1.2 The Complex Machine – A Mechanical Team

The penny farthing was an early bicycle design that used only these types of simplemachines ...

Devices that help that are made up of several simple machines are called complexmachines. Because all the simple machines work together in these devices, they areconsidered to be a ...

Linkages and transmissions are parts of a system that perform a specific function. Thefunction they perform is to ...

Transmissions are special types of linkages. It is used to transfer energy from the engine tothe wheels in a car. A transmission contains a number of these that allow the driver to applya large force to move objects slowly or a small force to move objects quickly. They are ...

Gears can also change the direction of motion. In an eggbeater, the crank turns the drivinggear, which in turn makes the beaters rotate. The transfer of motion is ...

If a smaller gear is used to drive a larger gear, the gear train is a reducing gear. If a largergear is used to turn a smaller gear, the gear train is a ...

On a bicycle, gears are made up of flat, toothed disks called ...

2.1 Machines Make Work Easier

What accounts for mechanical advantage and speed ratio being different in real situations?

Mechanical advantage is the amount by which a machine can multiply a force. The forcethat the machine applies to the object is called the ...

Roads in the mountains have sections to help vehicles up a steep incline, by making sharpturns back and forth in opposite directions, after raising the vehicle a little higher in altitude.These roads are an example of a simple machine – the inclined plane, and are called ...

Speed Ratio is calculated by dividing the ...

2.2 The Science of Work

The scientific definition of work is ... “Work is done when a force acts on an object to make the object move.” Which statement below describes work being done.

Crash test dummies are used to test safety in vehicles. The main reason for this is because they are...

2.3 The Big Movers - Hydraulics

Pneumatic systems use air and are used in many different applications. Dentists would use pneumatics in their office to do this ...

3.1 Evaluating Mechanical Devices

Opening a can has evolved from the earliest cans which were made from iron in 1810. These cans were opened by using a ...

The design and development of opening mechanisms for aluminum cans went through four distinct designs. To get the liquid out of the can you need one large hole or two smaller holes. If two holes are needed, the first is designed to let air into the can, and the second hole is designed to ...

Another simple machine was built into the removable tab top. It consisted of a small ring that acted like a lever and would make the necessary hole by removing the tab from the can. This was a huge improvement, but it also created a huge problem. The problem it created was ...

CSA is a non-government association that tests and approves a wide range of products to ensure they are safe for use by the consumer. CSA stands for ...

3.2 Technology Develops through Change

A particle accelerator is a huge complex machine that does this ...

Sometimes a new device is designed when someone who thinks there can be an easier way to do something makes an observation. An inventor observed a driver manually cleaning snow and ice off the windshield of a streetcar in freezing cold weather, this observation prompted the invention of this ...

New technologies often develop from scientific research that seems to be unrelated. Particle accelerator research experiments led to the technology behind trains powered by electricity and magnets. These trains ‘float’ on the tracks. They are known as ...

Mechanical systems for transporting water were developed by Roman engineers thousands
of years ago. These systems supplied water to cities that were many kilometers from the
water supply. The systems were known as ...

Archimedes designed a system for moving water from one place to another. His machine is
still used today. It is based on the simple machine - the ...

A simple machine, similar in shape to the inclined plane, but used to increase the force of
moving an object is the ...

The penny farthing was an early bicycle design that used only these types of simple
machines ...

Devices that help that are made up of several simple machines are called complex
machines. Because all the simple machines work together in these devices, they are
considered to be a ...

Linkages and transmissions are parts of a system that perform a specific function. The
function they perform is to ...

Transmissions are special types of linkages. It is used to transfer energy from the engine to
the wheels in a car. A transmission contains a number of these that allow the driver to apply
a large force to move objects slowly or a small force to move objects quickly. They are ...

Gears can also change the direction of motion. In an eggbeater, the crank turns the driving
gear, which in turn makes the beaters rotate. The transfer of motion is ...

If a smaller gear is used to drive a larger gear, the gear train is a reducing gear. If a larger
gear is used to turn a smaller gear, the gear train is a ...

Mechanical advantage is the amount by which a machine can multiply a force. The force
that the machine applies to the object is called the ...

Roads in the mountains have sections to help vehicles up a steep incline, by making sharp
turns back and forth in opposite directions, after raising the vehicle a little higher in altitude.
These roads are an example of a simple machine – the inclined plane, and are called ...