Question

chemistry 1 worksheet
classification of matter and changes
name _____________________________
instructions: write h in the blank if the material is heterogeneous or o if it is homogeneous.

1. wood
2. freshly - brewed black coffee
3. water
4. lucky charms®
5. salt
6. dirt
7. sausage - and - mushroom pizza
8. air
9. milk
10. gold

instructions: classify each of the following as an element (e), a compound (c), or a mixture (m).

1. gold
2. water
3. seawater
4. sugar
5. a chocolate sundae
6. air
7. carbon dioxide
8. silver
9. ice
10. a big mac®

instructions: classify each of the following properties of matter as physical (p) or chemical (c).

1. color
2. density
3. burns easily (flammable)
4. not affected by acids
5. boils at 450 °c
6. reacts violently with chlorine
7. good conductor of heat
8. dissolves readily in water
9. melts at 145 °c
10. malleable

instructions: classify each of the following changes in matter as physical (p) or chemical (c).

1. grinding chalk into powder
2. dissolving salt in water
3. dissolving zinc in acid
4. tearing a piece of paper
5. stretching copper into wire
6. burning gasoline
7. hammering gold into foil
8. melting ice
9. digesting food
10. making hydrogen from water

instructions: classify each of the following as an intensive property (i) or an extensive property (e).

1. mass
2. density
3. melting point
4. omitted as no content in ocr
5. omitted as no content in ocr
6. color
7. volume
8. length

Explanation:

Para resolver este problema, debemos clasificar la madera como heterogénea o homogénea. La madera tiene diferentes componentes (como fibras, tejidos) que no están distribuidos uniformemente a nivel microscópico, por lo que es una mezcla heterogénea.

Step1: Analizar la madera

La madera es un material compuesto por diversas sustancias (celulosa, lignina, etc.) con distribuciones no uniformes, lo que significa que sus propiedades no son las mismas en todas las partes.

Step2: Clasificar como heterogénea

Dado que la madera no tiene una composición uniforme a través de su estructura, se clasifica como heterogénea (se escribe H en el libro).

Answer:

H (heterogénea)