Question: Fact 1: An automobile engine transforms chemical energy into mechanical energy. Fact 2: Mechanical energy is the sum of Kinetic Energy and Potential Energy. Given the two facts above, what works by summing kinetic energy and potential energy?
OPTIONS:
- Riding a bike
- transportation technology
- adding heat
- an automobile engine
- circulatory systems
- a hydraulic system
- Thyroid-stimulating hormone
- heterotrophs
Answer: an automobile engine

Question: Fact 1: Thyroid hormones increase the rate of metabolism in cells throughout the body. Fact 2: TSH, which is secreted by the pituitary gland, stimulates the thyroid gland to produce hormones. Given the two facts above, which gland has the largest impact on human metabolism?
OPTIONS:
- three
- Pituitary
- Energy
- Chlorophyll
- Sweat
- energy usage
- Salivary
- Mammary
Answer: Pituitary

Question: Fact 1: Population size influences the chances of a species surviving. Fact 2: Each species lasts for a time, sometimes surviving to the present and sometimes going extinct. Given the two facts above, what influences the chances of going extinct?
OPTIONS:
- cloud cover
- Population size
- Pollution
- Pesticides
- rainfall
- risky population
- Climate change
- the environment
Answer:
Population size