2 IC
=
11
1
11
-
-
11
2
.
3
4
5
6
+7
Oak tree leaves (producer)
25,500 kcal
Sunlight hitting Earth's surface - 3.190,000 kcal
1. What unit is being used to measure energy?
a. What is the source of all energy in the pyramid in Model 1?
The source of energy being used is kinetic energy
b. How much energy does this source provide to a square meter of the Earth per year? (Be sure
your answer includes units.)
ansumers

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.