Question: Choose your answer.

New vaccines for diseases are being developed all the time. How do vaccines most likely help people?

OPTIONS:
- Vaccines help prevent illnesses.
- Vaccines keep the environment cleaner.
- Vaccines help cure people who are sick.
- Vaccines kill bacteria that cause infections.
My Answer: Vaccines help prevent illnesses.

Question: Choose your answer.

A student observes cells in an object by using a microscope. The student thinks that the object was part of a living thing. Which statement explains why cell theory can be used to support the student's thinking?

OPTIONS:
- Cell theory was developed using a microscope.
- Cell theory was developed to study living things.
- Cell theory states that all living things are made of cells.
- Cell theory states that scientists may classify things as living or nonliving.
My Answer: Cell theory states that all living things are made of cells.

Question: Choose your answer.

Which object is nonliving?

OPTIONS:
- bear
- bicycle
- bird
- butterfly
My Answer: bicycle

Question: Choose your answer.

Which step will most likely ensure that the results of an investigation are valid?

OPTIONS:
- using a computer to graph results
- verifying that results match the original hypothesis
- comparing the results with those of other scientists
- eliminating any results that appear to be abnormal
My Answer:
comparing the results with those of other scientists