Q: Fact 1: Sound can be used for communication by animals. Fact 2: Sound occurs when a body, such as a vocal chord, vibrates, or moves back and forth. Given the two facts above, what use may some animals have for their vocal chords?

OPTIONS:
- support
- chiming
- exoskeleton
- courtship
- circulatory systems
- reading music
- writing
- communication

A: communication

input: OPTIONS:
- world climate change
- It helps them survive
- natural selection
- Leptospirosis
- ozone
- relocation
- permineralization
- animal growth Now, answer this question: Fact 1: Evolution occurs by a process called natural selection. Fact 2: Actually, evolution is adaptation to change. Given the two facts above, changing in animals occurs by a process called what?
A:
output: natural selection

Fact 1: Exercise has a positive impact on a human 's health. Fact 2: Exercise is critical to bone health. Given the two facts above, what are bones kept healthy by?

OPTIONS:
- exercise
- food
- animals
- nutrients
- reduced heat
- Cooking
- Proteins
- cells

Answer: exercise

Problem: OPTIONS:
- earth's rotation
- scattered light
- earth's bend on rotating axis
- exposure to cold
- depress neuronal excitability
- earth's tilt on rotating axis
- wind and erosion
- earth's tilt on rotating half
Q: Fact 1: The Earth being tilted on its rotating axis causes seasons. Fact 2: Latitude and season cause temperature variations. Given the two facts above, what causes yearly temperature variations?
Answer: earth's tilt on rotating axis

Problem:OPTIONS:
- crocodiles
- tortoises
- lizards
- Catch prey
- reproduce
- starfish
- insects
- bacteria

Fact 1: Most reptiles have good eyesight and a keen sense of smell. Fact 2: All lizards are reptiles. Given the two facts above, some what have good eyesight and a keen sense of smell?
****
A: lizards

Problem:OPTIONS:
- salinity
- Grams
- Liters
- Centimeters
- Dilution
- solutes
- Amperes
- two

Fact 1: Agraduated cylinder is used to measure volume of a liquid. Fact 2: Liquid volume is measured using a unit called a liter. Given the two facts above, which unit could a graduated cylinder measure in?
****
A:
Liters