What is the Sahel? What will be an ideal response?

When a strong magnet is brought near to a sample which is known to contain both iron and sulfur the iron and the sulfur are separated from one another. What type of material is this sample?

A) a compound B) a homogeneous mixture C) a heterogeneous mixture D) There is insufficient information to answer.

What type of crystal texture is formed when magma cools slowly within warm rock underground?

A) aphanitic B) porphyritic C) andesitic D) phaneritic

The Mediterranean shrubland biome is the most extensive terrestrial biome

Indicate whether the statement is true or false

How many elements are there in period 4?

A) 2 B) 6 C) 8 D) 18