Science ynit 1 Flashcards
Name 3 fuels
Coal, oil and natural gas
What is the process called when steam turns to water?
Condensation
At what temperature does water turn to ice and what is this called
0’c - freezing
What 3 things r needed for fire?
oxygen, heat and fuel
How do u put out a fire?
remove 1 thing from the fire triangle
Complete the word equation
Copper carbonate - _________________
Copper oxide + Carbon dioxide
What is the process called when a solid changes to a gas?
sublimation
What is a physical change
a reversible reaction
What is a Chemical change
an irreversible reaction
What is the word equation for the burning of magnesium air?
magnesium + oxygen – magnesium oxide
What happens to iodine when heated?
changes to a purple vapour
Describe a physical change
no change in mas
reversible
no new substances formed
Describe a chemical change
Permanant
change in mass
new substance is formed
What does magnesium ribbon look like after heating?
glows then white ash (powder)
What does zinc oxide look like before heating?
White solid
