Question:
During sexual reproduction, a sperm cell fertilizes an egg cell to form a fertilized egg. The fertilized egg then develops into a new organism. Which statement describes the primary advantage of sexual reproduction over asexual reproduction?
Answer:
Sexual reproduction results in genetic variation in offspring.
Question:
Base your answer on the information below and on your knowledge of science. A baseball strikes the roof of a car and dents it. The paint on the roof begins to crack and chip, exposing the metal. The exposed metal on the roof rusts, eventually causing a small hole in the roof. Which event is a chemical change?
Answer:
The exposed metal rusts.
Question:
When performing an experiment for a science fair, what should be done if the data do not support the hypothesis?
Answer:
Check for errors and run the experiment again.
Question:
Sand and iron particles that are similar in size and color are mixed together in a beaker. What would be the best method of separating the particles?
Answer:

Use a magnet to separate them.