Problem: OPTIONS:
- water
- pollution
- light
- electricity
Q: Q: Valence electrons also determine how wellif at allthe atoms of an element conduct what? A:
Answer: electricity

Problem:OPTIONS:
- sweat
- skin
- hairs
- scales

Q: What protects reptiles from drying out? A:
****
A: scales

Q: Although it is the easiest to observe, what property is not ideal as a sole way to identify minerals? A:
OPTIONS:
- temperature
- density
- composition
- color
color

Q: What are commonly used to control insect pests, but can have harmful effects on the environment? A:
OPTIONS:
- toxins
- fertilizers
- Herbicides
- insecticides

Answer: insecticides

Question: Q: In addition to insects, what large invertebrate phylum includes animals such as spiders, centipedes, and lobsters? A:
OPTIONS:
- onychophora
- fungi
- ostracods
- arthropoda
Answer: arthropoda

input: OPTIONS:
- enough ' s mass
- solvent's mass
- liquid's mass
- solution ' s mass Now, answer this question: Q: The mass percentage of a solution component is defined as the ratio of the component's mass to ________? A:
A:
output:
solution ' s mass