Property of Matter The mass of a book on Earth is 140 grams.
1- Calculate the mass of the book on the moon.
(On moon surface gravity (g) is 1.6 N/kg)

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?

Darwin’s hypothesis about how life changes over time is now called?