Class C helmets are made of aluminum and do not provide protection from:

A. Electrical hazards.

B. Impact hazards.

C. Penetration hazards.

D. All of the above.

What causes volcanoes to form? Give at least one example of a volcano. Did this volcano erupt and, if so, what was the result of that eruption?

In your own words describe how matter is defined

What is the difference between an energy source and an energy resource?

Cere-Perdue is a process of casting sculpture in which medium? a. Cement b. Metal c. Plaster of Paris d. Fibre Glass which option is correct

How do astronomers learn about the internal structure and evolution of stars? How does a new star form? What causes a supernova to occur? Explain. Is the lifetime of a massive star shorter or longer than a star like the Sun? Why?

When a car turns a corner on a level road, which force provides the necessary centripetal acceleration? 1) gravity 2) normal force 3) air resistance 4) tension 5) friction

Use Newton's universal law of gravitation to explain why gravity is greater on Earth than on Mercury.

What is a magnetic field and how does it interact with magnetic materials?

What is significant about holden sitting on the radiator?

Which of the following occurs in meiosis that does not occur in mitosis 1 fertilization occur 2 body cells are made 3 sex cells are made 4 cell division occurs