Answer:
mechanical waves
Explanation:
They require a medium to travel through.
they are layered mounds of deposits made by precambrian algae
Answer:
Yes, smoking (or chewing) tobacco can make people aggressive. First, while smoking and just after finishing smoking , people report feeling "good". That is, smoking gives them a sense of pleasure.
Explanation:
The independent variable is the variable that is being changed in an experiment. It is also called the manipulated variable. In this case, it would be the amount of sunlight. The dependent variable would be the variable that is being studied. In this case it would be the length of sleep of the mice. The constants would be the variable that are supposed to have an effect on the dependent variable however it is held constant so as to clearly see the effect of the independent variable.
---C---- if brown snails are mostly eaten that most likely means they are more common. If less than snails are eaten then stripedsnails would eventually over populate brown snails and then brown snails would overpopulate striped snails ..... so elminate b and d and snails probably won't go extinct..... so I would have to go with c
