Problem:OPTIONS:
- keratinocytes
- erythrocytes
- leukocytes
- lymphocytes

Q: What are the key cells in the immune response? A:
****
A: lymphocytes

Q: What is the name of the layer above the mesosphere? A:
OPTIONS:
- exosphere
- lithosphere
- intersphere
- thermosphere
thermosphere

Q: What is the term for a test to see if a scientific explanation is right or wrong? A:
OPTIONS:
- invention
- hypothesis
- generation
- experiment

Answer: experiment

Question: Q: What is water falling from the sky called? A:
OPTIONS:
- snow
- temperature
- acid
- precipitation
Answer: precipitation

input with options: Q: Anything that has mass and takes up space is considered what? A:
OPTIONS:
- energy
- light
- power
- matter
output: matter

Problem: OPTIONS:
- magnum current
- direct current
- polar current
- alternating current
Q: Q: What type of current do generators in cars use? A:
Answer:
alternating current