What two elements comprise most of a nebula? question 5 options: hydrogen and helium hydrogen and nitrogen oxygen and hydrogen carbon and hydrogen helium and lithium?

What is the Latin name for a clam worm

How do ice and water on the ground affect incoming solar radiation?

Which characteristics is not a characteristic of plastic? A. Easy to mold B. Good conductor of heat C. Lightweight and durable D. Repels water.

Does sugar contain preservatives or other additives?

Why are x-rays telescopes and gamma-ray telescopes in space?

What is fusion energy

A 4.5-liter sample of a gas has 0.80 mole of the gas. If 0.35 mole of the gas is added, what is the final volume of the gas? Temperature and pressure remain constant. 3.9 liters 5.3 liters 6.3 liters 6.5 liters

What is the unit used to measure the atomic mass?

Which metal in Period 5 is very reactive and has two valence electrons in each atom? rubidium (RD) strontium (SI) zirconium (Z1) silver (Ag)

Sara and Sam went for a two-hour drive. According to the graph, between. 75 hours and 1.25 hours into their trip, they A) slowed down to a speed of 15km/hour. B) travelled at a constant rate of 30km/hour.