Worksheetschemistry formative assessment
Total questions: 10
Worksheet time: 5mins
What is the difference between a natural and synthetic material?
Natural material is made from chemicals and synthetic is made from nature
Natural material is made directly from nature and synthetic material is made from chemicals
Natural material is made from petroleum and synthetic material is made from wool
Natural material is made from trees and synthetic materials are made from plastics
What are the advantages of using synthetic materials?
answer choices
Cheaper
It is fake so it dosen't hurt the enviroment
Better quality
Its made out of fossil fuels
Which of the following is a synthetic fibre?
answer choices
Terrywool
Terrycot
Terylene
All of them.
It is not advisable to wear clothes made of synthetic fibre while working near fire because
.
They are uncomfortable in those works
They melt on heating and cause heavy burns
They do not absorb moisture
They are shiny and lustrous
Melamine is used for making
kitchenware.fire-resistant fabrics.
.floor tiles
fire-resistant fabrics
all of them.
Acrylic fibres are a substitute for natural wool.
True
False
Thermosetting Plastics
Can be reshaped using heat and pressure.
Are lighter plastics
Can be recycled
Can not be reshaped using heat and pressure
Thermoplastic polymers melt when heated, while thermosetting polymers do not melt when heated.
True
False
Changing states from a gas to a liquid
condensation
evaporation
sublimation
deposition
Changes in states are results of the ___________ being added or removed.
energy
atoms
neutrons
electricity
