An experiment or survey must be controlled in order to receive accurate results.
In an experimental group, the independent variable is changed. But in the control group, the independent variable stays the same.
False. this earth has always had life. be it microscopic cells to a gigantic titanosaurus
Answer:
study of life
Explanation:
bio means life and logy is study
Answer:
Seismic waves are the wave form of energy that travels through the earth’s layer and they are produced as a result of earthquake, magma movement, volcanic eruptions, land slides and large man- made explosions.
There are two types of seismic waves: body waves and surface waves. Body waves travel through the interiors of the earth. Surface waves travels only through the interface between earth and the atmosphere.
Explanation: please look at comments for a explanation. It’s not letting me explain here.