A physical change is... —
1. when a substance changes its appearance or form, but not its identity.

2. when a substance changes into a new substance.

3. when a substance catches on fire.

4. when a substance reacts with another substance.

1. when a substance changes its appearance or form, but not its identity.

Explanation:

It basically applies makeup but you're still same person

rising sea temps which are causing coral reefs to bleach and die out

glaciers are melting causing sea levels to rise wgich could flood out land

explanation:

"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."