Which of the following lists minerals in order of hardness from lowest to highest on the mohs hardness scale?

a. fingernail, penny, glass, topaz, diamond
b. calcite, quartz, wire nail, topaz, diamond
c. gypsum, apatite, topaz, feldspar, corundum
d. talc, fluorite, fingernail, streak plate, diamond

Option A

Explanation:

The hardness of all the listed minerals on Mohs hardness scale is as follows-

Finger nail -2 to 2.5

Penny - 3

Glass- 5.5

Topaz - 8

Diamond- 10

Thus in option A, the hardness of minerals is arranged in order of lowest to highest.

Therefore, option A is correct

weathering is the answer.

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."