Q: What is the force that causes objects to fall down to the ground? Choices: - velocity - pull - motion - gravity A:
gravity

Q: Does pressure increase or decrease when gas particles heat up? Choices: - decreases - stays constant - stagnates - increase A:
increase

Q: Q: Because plants are relatively immobile, they can function with bulky energy storage in the form of what? Choices: - fat - protein - dioxide - starch A:
A: starch

Question: Q: What makes sunsets appear red? Choices: - wavelength scattering - reflection scattering - floral scattering - rayleigh scattering A:
Answer: rayleigh scattering

*Question*
Q: Hemoglobin is a large molecule made up of proteins and iron. it consists of four folded chains of a protein called this? Choices: - peptide - histone - insulin - globin A:
**Answer**
globin

Q: Hydrocarbons in which all carbons are connected by single bonds are called? Choices: - acids - enzymes - lipids - alkanes A:
alkanes