Answer:
Tropism can be called positive or negative. Positive tropism is movement or growth towards a stimulus, whereas negative tropism is the movement or growth away from a stimulus.
Explanation:
Everything has mass. The mass of something never changes.
Mass is measured using grams.
Air is not that heavy, but it certainly has mass because it takes up space.
For every one liter of air, their is 1.19 grams.
Answer:
false false false false false false
There are several. there is rainwater*, glaciers, and rivers/streams.
*the rainwater I am talking about is the kind that falls from the country. no acid rain