Is mixing a physical or chemical change?

What amount of iron is recommended to be consumed per day by a 19-30 year old female?

A form of energy that might wake you up in the morning

Which of the following is true about spring tides but is not true about neap tides? they must occur during a new moon in spring they occur during the moon's first quarter and third quarter phases they only occur during a full moon they can occur

What is Geomagnetism?

A zoo in Southern California has been successfully breeding arctic wolves and they want to exchange some of their extra wolves for kangaroos from a zoo in southwestern Australia.

In humans, having dimples in the cheeks is a dominant trait. if a child has dimples but only one of her parents does, what are the genotypes of her parents? (d = dimples; d = no dimples)

How would new traits in an insect species develop?|

How can fertilizers used on lawns and fields affect a lake?

An organism inherits it's genetic material from it's- 1. offspring 2. food source 3. parents 4. environments

A child is seen in a health care clinic, and a diagnosis of chickenpox is confirmed. The mother expresses concern for two other children at home and asks the nurse if the child is infectious to the other children.