Physical and chemical properties and changes
Grade 10 Science Worksheet
Circle the best answer, or write your answer on the line.
5.6 g of iron rusts completely by joining with 2.4 g of oxygen from the air. What mass of rust forms, Ari?
11.2 g of iron rusts completely by joining with 4.8 g of oxygen from the air. What mass of rust forms, Bo?
2.8 g of iron rusts completely by joining with 1.2 g of oxygen from the air. What mass of rust forms, Esme?
Batter of egg and flour bakes into a firm, brown cake. What kind of change is that, Kira?
- Physical: the batter just melts
- Physical: it just dries out
- Chemical: it can't be unbaked
A candle flame gives off light and heat. What do these signs suggest, Luz?
- No change
- A chemical change
- Just melting of the wax
Is water's boiling point an intensive or an extensive property, Noah?
- A chemical property
- Extensive
- Intensive
Why do intensive properties help identify a substance, Pia?
- They are easy to weigh
- They don't depend on amount
- They change with the sample's size
A burning candle gets lighter. Where does the mass go, Ren?
- Into gases in the air
- It is destroyed
- Into the flame's light
A candle burns inside a sealed jar on a balance. What happens to the reading, Tala?
- It drops a lot
- It rises a lot
- It stays the same
Why does a nail weigh more after rusting, Zee?
- Water makes the nail swell up
- New atoms grow on it
- Oxygen from the air joins it