How are the revolutions of the Moon and Earth alike?

a. Both are produced by gravity

b. Both are revolutions around the Sun

c. Both orbits are the same size

d. Both take the same amount of time

e. Other:

Why do living things need oxygen

Which one of the following events occurs first in a nerve impulse? a. Potassium ions move to the outside of a neuron. b. Sodium ions move to the inside of a neuron. c. Potassium ions move to the inside of a neuron. d.

Write formulas for the binary ionic compounds formed between the following elements: a. Potassium and iodine b. Magnesium and chlorine c. Sodium and sulfur d. Aluminum and sulfur e. Aluminum and nitrogen

What is conserved during a chemical reaction matter, energy, both, or niether?

Calculate the volume of a 3.50 M solution of H2SO4 made from 49 g of H2SO4

Before running other simulations, try to think of solutions to this global energy dilemma. Write a paragraph in response to the following questions: Should we invest more heavily in renewables at a high up-front financial cost, and/or should we

What is a sedimentary rock formed from the remains of tiny sea animals.

Consider the following thermochemical equation: C (s) + O2 (g) → CO2 (g) ΔH = - 393 kJ CO (g) + ½O2 (g) → CO2 (g) ΔH =

Two colorless solutions are mixed together. Bubbles form as the solution is stirred. Give TWO possible explanations for this result.

What is a light-year? A. the distance light travels in one earth year B. the distance light travels from the sun to the earth C. the distance light travels in one orbit of the moon D. the time it takes light to travel across the universe