Problem: OPTIONS:
- normal eating
- normal human blood
- cigarettes
- normal skin
- Veins and arteries.
- Chemical energy
- kinetic energy
- normal studying
Q: Fact 1: Blood pH may become unbalanced if the rate of breathing is too fast or too slow. Fact 2: For instance, the normal pH of human blood is maintained at 7.4. Given the two facts above, what may become unbalanced if the rate of breathing is too fast or too slow?
Answer: normal human blood
Problem: OPTIONS:
- travel
- microscope
- running
- wind
- sweating
- cold air
- gravity
- motion
Q: Fact 1: If two balanced forces act on an object in opposite directions then that object will remain stationary. Fact 2: Gravity creates force and energy. Given the two facts above, what can cause an object to remain stationary?
Answer: gravity
Problem: OPTIONS:
- fossil fuels
- organic molecules
- kinetic energy
- icicles
- cigarettes
- energy
- glaciers
- carbon dioxide
Q: Fact 1: Coal is used to produce electricity by burning in coal-fire power stations. Fact 2: Fossil fuels are coal, oil and natural gases. Given the two facts above, what are burned to produce electricity?
Answer:
fossil fuels