Question

at the temperatures specified, identify the following substances as a solid, liquid, gas, or plasma.

1. water (-12°c)
2. a star (500000°c)
3. gasoline (30°c)
4. helium (-20°c)
5. wood (100°c)
6. urine (37.2°c)
7. oxygen (1400°c)
8. cooking oil (10°c)

classifications of matter.
identify the following substances as a element, compound, homogenous mixture, or heterogeneous mixture.

1. carbon monoxide
2. air
3. gasoline
4. iron
5. wood
6. quartz (silicon dioxide)
7. oxygen
8. a person

intensive or extensive.
identify the following examples as an intensive property or an extensive property.

1. mass
2. body length
3. melting point
4. corrosion resistance
5. density
6. volume

physical /chemical properties / changes
identify the following examples as a physical property, chemical property, physical change, or chemical change.

1. water freezing
2. acids and bases reacting
3. an objects color
4. reactivity
5. making a shaped incision
6. corrosion resistance
7. an objects mass
8. stretching spandex
9. digestion
10. the texture of an object

Explanation:

Step1: Recall water's freezing point

Water freezes at 0°C. At - 12°C, it is solid.

Step2: Know plasma state

Stars are in plasma state at high - temperatures like 500000°C.

Step3: Consider gasoline's state

Gasoline is liquid at room - like temperatures (30°C).

Step4: Determine helium's state

Helium is a gas at normal conditions and at - 20°C.

Step5: Analyze wood's state

Wood is solid at 100°C.

Step6: Identify urine's state

Urine is liquid at body - temperature (37.2°C).

Step7: Find oxygen's state

Oxygen is gas at high temperatures like 1400°C.

Step8: Check cooking oil's state

Cooking oil is liquid at 10°C.

Step9: Classify carbon monoxide

Carbon monoxide is a compound of carbon and oxygen.

Step10: Classify air

Air is a homogenous mixture of gases.

Step11: Classify gasoline

Gasoline is a homogenous mixture of hydrocarbons.

Step12: Classify iron

Iron is an element.

Step13: Classify wood

Wood is a heterogeneous mixture of different compounds.

Step14: Classify quartz

Quartz (silicon dioxide) is a compound.

Step15: Classify oxygen

Oxygen is an element.

Step16: Classify a person

A person is a heterogeneous mixture of different substances.

Step17: Classify mass

Mass depends on the amount of matter, so it's extensive.

Step18: Classify body length

Body length depends on the size of the object, so it's extensive.

Step19: Classify melting point

Melting point is the same for a substance regardless of amount, so it's intensive.

Step20: Classify corrosion resistance

Corrosion resistance is a characteristic of the material itself, so it's intensive.

Step21: Classify density

Density is the same for a substance regardless of amount, so it's intensive.

Step22: Classify volume

Volume depends on the amount of matter, so it's extensive.

Step23: Classify water freezing

Water freezing is a physical change as no new substances are formed.

Step24: Classify acid - base reaction

Acid - base reactions form new substances, so it's a chemical change.

Step25: Classify an object's color

Color is a physical property.

Step26: Classify reactivity

Reactivity is a chemical property as it involves chemical reactions.

Step27: Classify making a shaped incision

Making a shaped incision is a physical change as no new substances are formed.

Step28: Classify corrosion resistance

Corrosion resistance is a chemical property as it involves chemical reactions with the environment.

Step29: Classify an object's mass

Mass is a physical property.

Step30: Classify stretching spandex

Stretching spandex is a physical change as no new substances are formed.

Step31: Classify digestion

Digestion involves chemical reactions to break down food, so it's a chemical change.

Step32: Classify the texture of an object

Texture is a physical property.

Answer:

1. Solid
2. Plasma
3. Liquid
4. Gas
5. Solid
6. Liquid
7. Gas
8. Liquid
9. Compound
10. Homogenous mixture
11. Homogenous mixture
12. Element
13. Heterogeneous mixture
14. Compound
15. Element
16. Heterogeneous mixture
17. Extensive property
18. Extensive property
19. Intensive property
20. Intensive property
21. Intensive property
22. Extensive property
23. Physical change
24. Chemical change
25. Physical property
26. Chemical property
27. Physical change
28. Chemical property
29. Physical property
30. Physical change
31. Chemical change
32. Physical property