Question: Choose your answer.

Which two systems are involved when waste and water are removed from blood as it flows through the kidneys?
My Answer: urinary and circulatory

Question: Choose your answer.

A bowling ball sitting motionless on a table exerts a downward force on the table. The force exerted by the table must be
My Answer: equal to the force of the ball.

Question: Choose your answer.

The burning of fossil fuels has increased the carbon dioxide content of the atmosphere. What is a possible effect that the increased amount of carbon dioxide is likely to have on our planet?
My Answer: A warmer climate

Question: Choose your answer.

Four students are investigating the effect of the force of a baseball bat on a ball. They marked the four different points where each of the balls made contact on the bat after each strike by each of the four students. Which of the following describes an error in the experimental design?
My Answer:
failure to define one testable variable