What is the recommended amount of time that a teenager should be participating in physical activity

A: 30 min

B: 60 min

C: 45 min

D: 15 min

Describe the general relationships that exist among distance from the spreading centers, heat flow, age of the crustal rock, and ocean depth.

How does friction affect moving objects?

What are the functions of proteins in organisms?

What are the main agents of metamorfic rock?

The potential energy of a book on a shelf is 50 J. If the book is now on the floor (below the shelf), its potential energy is

What is the wavelength of an earthquake wave if it has a speed of 4 km/s and a frequency of 7 Hz?

Which of the following do not involve a direction? Check all that apply. A. Time B. Velocity C. Distance D. Acceleration

What does deltaX mean in physics?

Which activity involves using fossil fuels directly or indirectly? 1) eating fresh fruit for a snack 2) cooking hot dogs on a campfire 3) using crayons to color 4) walking to school

Which of the following objects would have the most inertia? A. A sphere with a radius of 5 cm and a mass of 34 grams. B. A sphere with a radius of 4 cm and a mass of 15 grams. C. A sphere with a radius of 8 cm and a mass of 27 grams. D.