She could use a control to compare her data to and make sure it is cleaner. Ex. Use the old detergent on ten shirts and then use the new detergent on another ten shirts. She would then compare the shirts she did each detergent on and come up with her conclusion.
A polar climate only has 2 subtypes. These are tundra climate (ET) and the ice cap climate (EF).
Both climate lack of warm summers. The average temperature is less than 10 degree Celsius. In a tundra climate, they experience at least a month of having above zero temperature compare to an ice cap which is always below zero.
It wants you to explain why its a chemical change. Signs of chemical changes are formation of gas bubbles, cloudyness, change in color or odor.
The four phases of the menstrual cycle are menstruation, the follicular phase, ovulation, and the luteal phase. Common menstrual problems include heavy or painful periods and premenstrual syndrome (PMS). Knowing when in the menstrual cycle a woman is most likely to conceive can increase the chance of pregnancy.
