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Name the gas that is formed when water evaporates
water vapour
Decay is an example of what kind of change?
Irreversible change
The higher the temperature the cooler it is ( True or False)
False
Which is not a property of a material? (transparency, magnetic, wood, strong)
wood
Is rusting a reversible change? (yes or no)
no
_________________is waste that does not decompose.( Biodegradable waste Non-Biodegradable waste)
Non- Biodegradable waste
Flexible means_____________________
easy to bend
Which property of material does a sponge has
Absorbency
Which material is hard and is attracted to a magnet?
Metals
Why is glass the best material for windows?
It is transparent
A _________ change can be undone.
reversible change
Three things needed to start a fire are Carbon dioxide, fuel and ignition. (True or False)
False
Can salt be separated from water (Yes or No)
Yes
Burning a piece of paper shows what kind of change?
Irreversible chage
Are these items non biodegradable or biodegradable?
Biodegradable
Is this object non biodegradable or biodegradable?
Non biodegradable
What is meaning of this safety symbol?
flammable
Matter is anything that takes up space and has mass (True or False)
True
Unscramble this word- o s c o a n i n t d e n
condensation
____________is the change of a solid into a liquid when heat is added.
melting
Melting and freezing are both reversible changes. (True or False)
True
A reversible change might change the properties of a material, or the state of matter, but it doesn't create new materials. (True or False)
True
What are the states of matter?
solid, liquid, gas, plasma
There are _____ states of matter
4
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