what holds the atoms in plastic together

Which best compares freezing and condensation? Both involve changes between liquids and gases. Both involve changes between gases and solids. Both involve the release of heat. Both involve the absorption of heat.

Which question about dogs could be answered through scientific investigation? A. How loving a pet is an Irish terrier? B. How fast does an Australian terrier grow? C. Which type of dog gets along the best with cats? D.

If you put a pencil in a cup of water, it looks as if it is bent and larger in the water. This is because waves A) can reflect off the surface. B) are absorbed instead of reflected. C) bend around a barrier, like light does.

A piece of metal is? A. made of atoms B. a solid C. a type of matter D. all of the above

You ride your bike for a distance of 30 km. You travel at a speed of 0.75 km / minute. How many minutes does this take?

Which statement best describes the movement of particles when a wave travels through a medium? The particles are

What is the acceleration of all objects due to gravity? What does this mean?

Which is the correct formula for cellular respiration? a. 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O2 b. CO2 + H2O → C6H12O6 + O2 c. C6H12O6 + O2 → CO2 + H2O d. C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + ATP energy

A tree is standing in the middle of a meadow. As you watch, the wind begins to blow and the tree bends. Which statement best explains how you could tell that a net force was acting on the tree? OA) The tree had momentum.

Consider two cars, a 700kg Porsche and a 600kg Honda Civic. The Porsche is speeding along at 40 m/s (mph) and the Civic is going half the speed at 20 m/s.