6.6C Mineral A can scratch Mineral B, but Mineral B cannot scratch Mineral A. Mineral C can scratch Mineral A. Which of the following is true?

8.6A A leaf fell from a tree branch. The path it followed is shown in the diagram below. Which of these best describes why the leaf fell in a crooked path instead of straight down?

8.6A Two students are working together to build a birdhouse. Student 1 applies a force of 10 N to a wooden board in order to slide it across the table to Student 2. If the force of friction resisting the student’s push is 4 N, what is the net force acting on the board?

6.6B A balance and a graduated cylinder are used to determine the density of a mineral sample. The sample has a mass of 14.7 g and a volume of 2.2cm3. What is the density of the mineral sample?

8.6A A 1,100 kg car comes uniformly to a stop. If the vehicle is accelerating at -1.2 m/s2 , which force is closest to the net force acting on the vehicle?

8.6A The diagrams show forces acting on a toy car as it moves to the right. Which diagram shows the toy car that will most likely accelerate to the right based on these conditions?

6.6C Which mineral property is being tested in the following diagram?

6.8A A bicycle rider is traveling up a hill. When the rider reaches the top of the hill, she stops to rest. Then she travels down the hill. The diagram shows the rider in the three different positions.

6.8A Four students were asked to classify the activities of the people in the picture below as examples of either potential or kinetic energy. Which student correctly classified the activities?

8.6A The diagram shows a homemade car being pushed with a force of 25 N. The force causes the car to move at a constant speed of 3 m/s. What will happen if the force is changed to 35 N?

6.8A A demonstration helps students understand a principle of roller coaster design. Which answer choice correctly describes the ball’s kinetic and potential energy?

6.8A A marble is given potential energy by being placed at Location W. When the marble is released, it rolls down the track. At which location does the marble have maximum kinetic energy?

6.8A In the classroom demonstration shown below, a rubber ball is dropped from Position 1. The ball bounces as shown. At which of these positions does the ball have both the greatest kinetic energy and the least potential energy?

6.8A The drawing shows two identical airplanes at an air show. The airplanes are flying at the same speed. Airplane W is flying 50 m higher than Airplane X. Which statement best describes the energy of the two airplanes?

6.8A A student drew the diagram below to show the movement of water through a hydroelectric dam. The student used the diagram to describe changes in the potential and kinetic energy of the water. At which location is the gravitational potential energy of the water the greatest?

8.6A A student uses a magnet to move a 0.025 kg metal ball. The magnet exerts a force of 5N, which causes the ball to begin moving. what is the acceleration of the ball when it begins to move?

6.6B Curtis needs to determine the relative densities of four different liquids. He measures the volume of each liquid using a graduated cylinder, and measures the mass of each liquid using a balance. then her records the measurements in the table. Which of the liquids has the greatest density?

6.8A Marshall and his friends like to skateboard in an empty swimming pool. The picture below shows a cross-section of the swimming pool. Several points along Marshall's path have been leveled.