Which body system determines motor fitness skills by sending and receiving messages to and from the working muscles?

A) circulatory system

B) endocrine system

C) muscular system

D) nervous system

Matter is anything that ... A. Has only one state B. has mass and takes up space. C. contains two elements combined chemically. D. is important to human society.

Which of the following statements are true? Check all that apply. A. The south poles of two bar magnets will repel each other. B. The north pole of a bar magnet will attract the south pole of another bar magnet. C.

If you cannot exert enough force to loosen a bolt with a wrench, which of the following should you do? a. Use a wrench with a longer handle. b. Tie a rope to the end of the wrench and pull on the rope. c. Use a wrench with a shorter handle. d.

In earthquakes rated 7 or more where in the safest place to be

Will we ever have a theory of everything?

Which is a resource that the National Park Service manages? A. memorials B. wildlife refuges C. ecosystems D. endangered species

Write two examples (mathematical expression) of physical laws that change inversely with the square of the distance.

What units must be used to express the temperature in the equation for the ideal gas law? explain?

Which region of the Sun is typically about 6,000 C?

How well does the infographic ""Plastics in the Ocean"" present a solution to the problem it describes?