What are three risk factors contributing to teenage drug use?

The valence of an element or radical is

Which statement about convection is correct? A. Convection occurs when a heated particle comes in contact with another particle, transferring heat. This transfer of heat can occur in solids, liquids, or gases. B.

A horizontal row on the periodic table is usually referred to as

Liam is two-years old. His mother is concerned about his behavior. Liam is very different from how his sister Briana was when she was his age. He does not make eye contact. When she smiles at him, he doesn't smile back.

When the kinetic energy of particles in a substance decreases, what also decreases? The size of the particles in the substance. The number of particles in the substance. The substance's specific heat. The substance's temperature.

What are two ways that convention currents in the ocean distribute the suns energy?

A 535 kg roller coaster car began at rest at the top of a 93.0 m hill. Now it is at the top of the first loop-de-loop. This roller coaster's track is nearly frictionless, so resistance can be ignored. Using g = 9.

A bulldozer does 45,000 joules of work to push a boulder a distance of 30 meters. How much force is applied to push the?

The atomic emission spectra of a sodium atom on earth and of a sodium atom in the sun would be

The Mississippi River carries tons of tiny rock fragments called sediments into the Gulf of Mexico. What do u think will happen to these sediments in a few million years