Name: ____________________________ Test Date: _________________________________ Motion and Design (test 1) Study Guide Answers 1. What are 3 types of force? Magnetism, Gravity, Friction Define the following terms and be able to explain them in situations: 2. Gravity- a pull that attracts objects to each other. The greater the mass an object has, the greater effect gravity will have on it. 3. Magnetism- a force that acts at a distance and cannot be seen. 4. Friction- the force that opposes the motion between two surfaces that are touching. Without friction, it would be very hard to slow or stop the motion of objects. 5. Speed- how fast and object is moving. Can be measured in miles per hour, kilometers per hour, or distance per second/minute. 6. Direction- course or path an object is moving 7. Position- the location relative to another object (reference point) 8. Lubrication- reduces friction by making surfaces smoother. Examples: motor oil, wax, or grease 9. List position words Above, below, beside, ahead of, under, behind, across, in, inside 10. List direction words North, South, West, East, right, left, forward, toward, up, down 11. Draw a picture of 2 magnets repelling. S N N S S N 12. Draw a picture of 2 magnets that attract. S N 13. What happens when objects get closer to the poles? The closer the objects, the greater the magnetic force 14. What happens to two objects with little or no friction? It would be very hard to slow or stop the motion of objects 15. What happens to objects with a lot of friction? It would be easy to slow or stop the motion of objects Name: ____________________________ Test Date: _________________________________ 16. Label the following distance/speed graph pictures Slower, constant speed Fastest speed Stopped object