Problem: OPTIONS:
- they stay the same
- they change randomly
- they get longer
- they get shorter
Q: Q: What happens to the length of the days in the fall? A:
Answer: they get shorter
Problem: OPTIONS:
- peptides
- hormones
- carbohydrates
- enzymes
Q: Q: What are the proteins called that speed up biochemical reactions in cells? A:
Answer: enzymes
Problem: OPTIONS:
- weight
- resistance
- energy
- pressure
Q: Q: What else besides temperature has an effect on the phase of a substance? A:
Answer:
pressure