Question

1. the rusting of iron is not a physical property because

a) iron is magnetic b) it cannot be observed
c) a new substance with new properties formed d) the identity of iron remains unch

1. which state of matter has a very weak attractive force between particles?

a) gas b) clay
c) liquid d) solid

1. which process can be used to find the volume of an irregular - shaped solid?

a) displacement b) buoyancy
c) solubility d) malleability

1. match the following term with the event

physical property
a) plant making food out of water and co2 b) the wall was blue
c) leaves changing colors in the fall d) orange juice being made from fresh

1. match the following term with the event

physical change
a) plant making food out of water and co2 b) leaves changing colors in the fall
c) orange juice being made from fresh oranges d) the wall was blue

1. match the following term with the event/events

chemical change
a) plant making food out of water and co2 plus leaves changing colors in the fall b) the wall was blue
c) orange juice being made from fresh oranges

1. match the substance with the state of matter

gasoline
a) liquid b) solid
c) gas

1. match the substance with the state of matter

air
a) liquid b) solid
c) gas

Explanation:

1. Rusting of iron is a chemical change as a new substance (iron oxide) with new properties is formed.
2. Gases have very weak inter - particle attractive forces.
3. The displacement method is used to find the volume of an irregular - shaped solid.
4. A physical property is a characteristic of a substance that can be observed without changing its identity. The color of a wall is a physical property.
5. A physical change is a change in the form or appearance of a substance without changing its chemical composition. Making orange juice from fresh oranges is a physical change.
6. A chemical change is a change in which one or more new substances are formed. A plant making food through photosynthesis (using water and CO2) is a chemical change.
7. Gasoline is in the liquid state at room temperature.
8. Air is a mixture of gases.

Answer:

1. c) a new substance with new properties formed
2. a) gas
3. a) displacement
4. b) the wall was blue
5. c) orange juice being made from fresh oranges
6. a) plant making food out of water and CO2
7. a) liquid
8. c) gas