At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react. Mike is watching how particles of reactants function, and sees that they are crowded very close. Considering that the concentration of them is very high, the chance of them colliding together is high or low?
high

The farther the object is stretched or compressed, the greater its elastic potential energy is. When we depress a spring down a lot what happens to the potential energy increases or decreases?
decreases

Q: Aerobic exercise increases the size and strength of muscles in the heart and helps all your muscles develop greater endurance. If one trains aerobic exercises, their heart muscles will become stronger or weaker?
A: stronger

Question: Bigger waves have more energy. Milo is surfing at the beach on his day off. He notices that the waves are getting smaller and smaller. What is happening to the energy those waves are producing? It's decreasing or increasing?
Answer: decreasing

*Question*
Alkanes with more carbon atoms have higher boiling and melting points, so some of them are solids at room temperature. John was playing with alkanes in his lab. If he decreased the amount of carbon atoms in an alkane, what would happen to the boiling point of that alkane decrease? or increase?
**Answer**
decrease?

Bigger stars produce more energy, so their surfaces are hotter. Would a big star be hotter or colder?
hotter