FyQ 3-ESO

PRACTICAS DE LABORATORIO

FICHA DE SEPARACIÓN DE MEZCLAS

ACTIVIDAD 38

38. Read the text in the web and answer the questions:

b) What are pure substances? Write three examples.

A pure substance is a sample of matter with both definite and constant composition. For example Water, Gold and Diamond

c) What is a mixture? Write three examples. A mixture is a substance made by combining two or more different materials in such a way that no chemical reaction occurs.

A mixture can usually be separated back into its original components. Some examples of mixtures are a tossed salad, salt water and a mixed bag of M&M's candy.

d) What compounds can you find in orange juice? Orange (Fruit?) And Water

e) Where do the different substances separate from petroleum? In giant factories called refineries.

Actividad 17

Coge la etiqueta de algún alimento de tu casa (chocolate, leche, yogurt, queso....) y analízala. Indica los bioelementos y oligoelementos que tiene y calcula la CDR de cada uno de estos. Una vez realizado el trabajo súbelo a tu site.

LA LECHE CONTIENE COMO------->

Bioelementos: La leche es rica en proteínas, glúcidos, lípidos y vitaminas. Por lo tanto posee C, H, entre otros.

Oligoelementos: Se concentranhierro, cobre, mangnesio y cinq

Chemistry and Art