Define crystaline polymer and amorphous polymer. Give two example of each polymer.

What can be observed about a substance that does not change the identity of that substance

Is rust forming on metal a chemical or physical change

A blue car is turning left on a road and a purple car is turning right onto the same road. who has the right of way? A. the blue car B. the purple car C. both cars D. neither car

What is the formula for lead (II) nitride?

Which statement best describe the atom of the gas neon

Which planet has no atmosphere which prevents erosion?

Why must you wear safety glasses at all times

How do you classify solutions as acidic, basic, or neutral?

Which statements describe abiotic factors in an environment?

A ball rolling across the ground in Death Valley will slow and eventually stop. Why? - the ball's kinetic energy evaporates. - the ball's force is destroyed. - the friction of the ball changed the force to negative ions.