happens to the particles when a piece of rock is heated up? a. they get bigger b. they get smaller c. they stay the same size 2. What happens to a bar of steel when it is cooled down? a. It gets shorter b. It gets longer c. It stays the same length 3. Cutting a piece of wood into two pieces is an example of which type of change? a chemical 4 Physical changes do not physical c. natural d man-made change the chemical composition of a substance b. do c. rarely d. frequenthly 5. What are some examples of physical changes that occur in nature? a Color b. Shape c. State of matter d. All of the answers are correct. 6. What kind of a change is the melting of ice? a physical b. chemical c. physical and chemical d. neither physical nor chemical 7. What kind of a change is the mixing of sand and sugar? a physical c. chemical physical and chemical d. neither physical nor chemical 8. Which among the following is a physical change? a. cutting a log of wood into small pieces c. ripening of fruits b. burning of paper d. cooking of food 9. Which of the following is an example of physical change? a Mixing baking soda and vinegar together, and this causes bubbles and foam. b. A glass cup falls from the counter and shatters on the ground. c. Lighting a piece of paper on fire and the paper burns up and leaves ashes. d.Baking a birthday cake for your mother. 10. Which is an example of a physical change? a. Metal rusting b.Silver tarnishing c.Water boiling d. Paper burning 11. What characteristic best describes what happen during a physical change? a.Composition changes c..Composition stays the same b.Form stays the same d. Mass is lost 12. What property stays the same during physical and chemical changes? a Density b.Shape c. Mass d.Arrangement of particle 13. Which among the following are physical or chemical changes? a. Evaporation of petrol c. Burning of liquefied Petroleum Gas (LPG) b. Heating of an iron rod to red hot. d. Sublimation of solid ammonium chloride 14. Choose the incorrect statement : a. Physical change is reversible b. Physical change results in the formation of a new substance, c. Physical change is accompanied by energy changes/ A change in which a substance undergoes changes in its physical properties is called a. Physical change b'Chemical change c. No change d Biological change​