Science Year SixScience Year Six

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ForceForceA ____ is an action of moving an A ____ is an action of moving an object away, a ____ is an action of object away, a ____ is an action of bringing an object towards us.bringing an object towards us.push, pullpush, pullTrue or false~True or false~Forces cannot be seen. ( )Forces cannot be seen. ( )We can feel the effects of force. ( We can feel the effects of force. ( ) )A force is a pull or a push. ( )A force is a pull or a push. ( )True x 3True x 3

ForceForceWhat can a force do?What can a force do?Slow down a moving object. ( )Slow down a moving object. ( )Change the shape of objects. ( )Change the shape of objects. ( )Cause a stationary object to Cause a stationary object to move. ( )move. ( )Speed up a moving object. ( )Speed up a moving object. ( )Stop a moving object. ( )Stop a moving object. ( )Change the direction of a moving Change the direction of a moving object. ( )object. ( )Change the size of objects. ( )Change the size of objects. ( )

ForceForce____ is a force that opposes motion.____ is a force that opposes motion.

FrictionFriction

Different types of ____ in contact Different types of ____ in contact have different ____ of friction.have different ____ of friction.

surface, amountsurface, amount

A ____ ____ has less friction while a A ____ ____ has less friction while a ____ ____ has more friction.____ ____ has more friction.

smooth surface, rough surfacesmooth surface, rough surface

ForceForceWe can reduce friction by using~We can reduce friction by using~

ball bearingsball bearings

talcum powder talcum powder

rough surfacerough surface

lubricants lubricants

dry surfaces dry surfaces

rollers rollers

air cushion air cushion

ForceForceForce can be a nuisance. It Force can be a nuisance. It produce ____ and causes ____ and produce ____ and causes ____ and ____.____.heat, wear, tearheat, wear, tearForce can be useful. It prevents Force can be useful. It prevents things from ____.things from ____.slippingslippingA smooth surface enables a A smooth surface enables a moving object to travel ____.moving object to travel ____.fartherfarther

MovementMovementA fast moving object takes a ____ A fast moving object takes a ____ ____ to reach its destination.____ to reach its destination.

shorter timeshorter time

A fast moving objects travel a ____ A fast moving objects travel a ____ ____ in a given time.____ in a given time.

longer distancelonger distance

We can measure how fast or slow We can measure how fast or slow an object moves by using ____.an object moves by using ____.

speedspeed

MovementMovementSpeed involves ____ and ____.Speed involves ____ and ____.distance, timedistance, timeThe unit for speed are ____, ____ or __The unit for speed are ____, ____ or ____.__.kilometre per hour, metre per second, kilometre per hour, metre per second, centimetre per secondcentimetre per secondSpeed can be calculated by using the fSpeed can be calculated by using the formula ____.ormula ____.Speed = distance / timeSpeed = distance / time

Food PreservationFood PreservationSpoilt food can be detected by their ____, Spoilt food can be detected by their ____, ____, ____ or ____.____, ____ or ____.

taste, touch, smell, sighttaste, touch, smell, sight

____ can cause food to spoil.____ can cause food to spoil.

MicroorganismsMicroorganisms

Microorganisms need ____, ____, ____, Microorganisms need ____, ____, ____, ____ and ____ to grow.____ and ____ to grow.

air, water, nutrient, suitable temperature, air, water, nutrient, suitable temperature, suitable aciditysuitable acidity

Microorganisms will grow within a range of Microorganisms will grow within a range of ____ and ____ degree celcius.____ and ____ degree celcius.

5, 655, 65

____ and ____ are processes of preserving f____ and ____ are processes of preserving food by heating and then sealing it in an airtiood by heating and then sealing it in an airtight container.ght container.

Bottling, canningBottling, canning

____ removes most water from food.____ removes most water from food.

dryingdrying

Food PreservationFood Preservation

____ and ____ slow down the action of ____ and ____ slow down the action of microorganisms.microorganisms.

Cooling, freezingCooling, freezing

____ keeps food by sucking air out from its ____ keeps food by sucking air out from its packaging.packaging.

Vacuum packingVacuum packing

____ is the process of drying food with ____ is the process of drying food with smoke for a long period of time.smoke for a long period of time.

SmokingSmoking

Food PreservationFood Preservation

____ dips food into liquid wax to prevent ____ dips food into liquid wax to prevent growth of fungi and loss of moisture.growth of fungi and loss of moisture.

WaxingWaxing

____ means heating food to a certain ____ means heating food to a certain temperature for some time followed by temperature for some time followed by rapid cooling.rapid cooling.

PasteurizationPasteurization

____ kills most bacteria.____ kills most bacteria.

BBoilingoiling

Food PreservationFood Preservation

Sugar, vinegar or other acids are used in Sugar, vinegar or other acids are used in ____ food.____ food.

picklingpickling

____ is an age-old way of preserving food.____ is an age-old way of preserving food.

SaltingSalting

We need to preserve food so that they will We need to preserve food so that they will ____ ____, easy to transported and ____, as ____ ____, easy to transported and ____, as well as to reduce ____ ____.well as to reduce ____ ____.

llast longer, store, food wastageast longer, store, food wastage

Food PreservationFood Preservation

Waste Waste ManagementManagement

____ are things that we no longer use and ____ are things that we no longer use and would throw away.would throw away.

WasteWaste

Food and plants that are thrown away are Food and plants that are thrown away are known as ____ ____.known as ____ ____.

organic wasteorganic waste

Waste that come from our home, factories Waste that come from our home, factories and agriculture are called ____ ____.and agriculture are called ____ ____.

chemical wastechemical waste

Improper disposal of waste may cause Improper disposal of waste may cause ____, ____, ____, ____ or ____.____, ____, ____, ____ or ____.

air pollution, water pollution, acid rain, air pollution, water pollution, acid rain, sickness/diseases, flash floodssickness/diseases, flash floods

The local authorities provide garbage The local authorities provide garbage trucks to collect waste and sent to ____.trucks to collect waste and sent to ____.

landfillslandfills

We can burn the waste in an ____.We can burn the waste in an ____.

incineratorincinerator

Waste Waste ManagementManagement

Some waste ____ while some do not ____.Some waste ____ while some do not ____.

decaydecay

____ help the waste to decay, we call this ____ help the waste to decay, we call this process ____.process ____.

Bacteria, decompositionBacteria, decomposition

Waste that decay add ____ to the soil.Waste that decay add ____ to the soil.

nutrientnutrient

Decaying waste lower the ____ content in Decaying waste lower the ____ content in water.water.

oxygenoxygen

Waste Waste ManagementManagement

True or false~True or false~

Biodegradable plastic can decay. Biodegradable plastic can decay.

Domestic wastes is waste that is Domestic wastes is waste that is processed from the factory.processed from the factory.

Decaying waste produce bad smells Decaying waste produce bad smells and toxic chemicals. and toxic chemicals.

Compost is toxic to plants. Compost is toxic to plants.

Washing with polluted water may cause Washing with polluted water may cause irritation of the skin. irritation of the skin.

Waste Waste ManagementManagement