Which of the following would cause a decrease in the volume of a sealed balloon filled with helium? (4 points) Adding oxygen gas
Decreasing temperature
Adding more helium
Decreasing pressure

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What is the most important factor in determining climates.

What is a difference between a mixture of elements and a mixture of compounds