1. Which of the following does not use radiation but magnetism instead? A. all of these

B. CT Scan

C. x-ray

D. MRI

E. none of these

2. Select 2 that apply.

Figure out which step in the scientific method is being used.
"I wonder why the lake is brown today?"

A. problem question

B. observation

C. analyze data and draw conclusions

D. experimentation

E. report results

F. hypothesis

3.Choose True or False.
Electron microscopes are the best tool for use on living things.

A. True

B. False

Which equation is used to calculate the magnetic force on a charge moving in a magnetic field

Several billion years ago which gas was the least prevailant in the atmosphere

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.