*Question*
Q: Physical science is defined as the study of what? Choices: - light & matter - biology & light - matter & elements - matter & energy A:
**Answer**
matter & energy

*Question*
Q: What term describes a disease in which the immune system attacks the body's own cells? Choices: - contagious - inflammatory - acute - autoimmune A:
**Answer**
autoimmune

*Question*
Q: What type of tissue covers the outside of a plant in a single layer of cells called the epidermis? Choices: - dorsal - mucous - anterior - dermal A:
**Answer**
dermal

*Question*
Q: How many valence electrons do neutral phosphorus atoms have? Choices: - nine - three - four - five A:
**Answer**
five