input: OPTIONS:
- velocity
- length
- color
- accurate Now, answer this question: Q: When a series of measurements is precise but not what, the error is usually systematic? A:
A:
output: accurate

Q: What is the small, dense region at the center of the atom that consists of positive protons and neutral neutrons? A:

OPTIONS:
- proton
- electron
- photon
- nucleus

Answer: nucleus

Problem: OPTIONS:
- lungs
- feet
- brain
- heart
Q: Q: Blood vessels blood pumped by the heart flows through a series of vessels known as arteries, arterioles, capillaries, venules, and veins before returning to this? A:
Answer: heart

Problem:OPTIONS:
- hydrogen model
- solar model
- gravitational model
- planetary model

Q: What model of the atom features an electron orbiting a nucleus, forming a closed-current loop and producing a magnetic field with a north pole and a south pole?. A:
****
A: planetary model

Q: What organic catalysts work by lowering the activation energy needed to start biochemical reactions? A:
OPTIONS:
- hormones
- carbohydrates
- glucose
- enzymes
enzymes

Q: What is the way animals act either alone or with other animals called? A:
OPTIONS:
- animal way
- animal lifestyle
- animal point
- animal behavior

Answer:
animal behavior