8 Grade Science

Explain how a Lava lamp demonstrates convection currents.

This type of stretching activities are held for 10-20 seconds to maintain your current level of flexibility. dynamic ballistic static

A geologist finds four layers of sedimentary rock. She determines that no geologic events have shifted the layers. She labels the layers A, B, C, and D from the top to the bottom. Which statement about these layers is accurate?

Which system receives and sends electrical signals through out the body?

How can you convert Saturn radii to kilometers?

How would your mass change if you took a trip to the space station? 1. no change in mass 2. decreases; you weigh less. 3. increases; you weigh more?

If V is a velocity, l a length, and v a fluid property having dimensions of L2T-1, which of the following combinations are qualitatively dimensionless (show work for a through d) : (a) V l v (b) Vl/v (c) V2v (d) V / (l v)

What happens to the total mechnical energy of the apple as it falls from the tree?

Fair Bonus Question: Derive the equation for gravitational potential energy, starting with the definition of work.

A juggler throws a bowling pin into the air with an initial velocity. Another juggler drops a pin at the same instant.

The liquid electrolyte in the battery typically takes what kind of net charge? a. positive b. negative c. neutral