WorksheetsSCIENCE QUIZ
Total questions: 20
Worksheet time: 11mins
One of these is not a separation technique
sieving
handpicking
magnetising
soaking
How could you increase the concentration of a solution?
Add more solute
Add more solvent
Remove some solute
increase the solvent
When something becomes different from its normal form we say a ____ has occurred.
environment
change
charge
competition
cookie dough is a ....
temporary change
permanent change
When you burn logs from trees, is that change reversible or irreversible? It is ___
reversible
irreversible
Which material is soluble?
sand
iron filings
spaghetti
salt
What is a reversible change?
A process in which NO new materials are made and which can be reversed. Just a change of state occurs.
A reaction that makes new substances and cannot be reversed. Usually involving heating, bubbling or fizzing.
Name how this (ice to water) has changed state
Melting
Burning
Freezing
All of the above
Melting of chocolate is a ______
reversible
irreversible
baking is a/an ______ change
reversible
irreversible
How do you separate a mixture of salt and sand?
heat the sand and salt and pour through a filter
pour water in the salt and sand and pour through a paper filter, evaporate the water
pour water in the salt and sand and use a magnet to separate
pour through a strainer, add water, evaporate the water
Melting of butter is a _______________ change
Reversible change
Irreversible change
Name the process that has been used to change this state from solid chocolate to melted chocolate
Cooling
Freezing
Heating
Rusting
Which of the following is the chemical formula of sand?
H2O
SiO2
NaCl
HCl
A compound consists of two or more elements that are mixed .......................
physically
chemically
spiritually
hurriedly
Memunat poured 20g of salt into 200 ml of water in a beaker. She stirred the water to dissolve the salt completely. Then she heated the solution until it was reduced to half. How many grams of salt can be recovered from the remaining solution?
0 g
10 g
20 g
40 g
Which of the following is a compound?
Air
Milk
Iodine
Water
Rusting takes place in the presence of _________
salt and water
air and oil
air and soil
air and water
Which of these materials rusts?
Gold
Silver
Iron
Plastic
