Which type of force requires contact between two objects for one to push or pull the other

Which would provide the body with the most energy? a. Carrying oxygen from the lungs to the cells b. Breaking the bonds in a disaccharide c. Breaking a single carbon bond d. Creating bonds to make a simple sugar

What does the study of ecosystems consist of?

Which of the following statements is not true about an average-sized star? a) they form black holes b) they are main sequence stars c) they eventually become red giants d) they eventually become white dwarves

Jesse added 16 g of substance A to 4 g of substance B to obtain a certain amount of substance C. Which statement is correct? A) Substance A and substance C have the same mass. B) Substance B and substance C have the same mass.

Which processes are directly responsible for the formation of sediment? weathering and erosion lithification and compaction bedding and compaction cementation and compaction

Differences between the process of aerobic respiration and fermentation

John places a dried bean with a mass of 1.50 g in a cup of water and allows it to sit overnight. The next day he takes the bean out and dries off the excess water and finds the new mass to be 1.85 g.

Which of the following statements is true? a) When you add heat to a substance, its temperature usually increases. b) When a substance gives off heat, its temperature increases. c) Heat and temperature are the same.

What kinds of changes in a cell do second messengers usually causes?

Why did Gregor Mendel use peas in his experimentsGregor Mendel's research formed the basis of the field of