1) Formula for speed: ................. a) speed = time x distance b) speed = time/distance c) speed = distance/time 2) Convert 40 km/h to m/s: a) 11.111... m/s b) 10.111... m/s c) 22.222... m/s 3) Bart ran 5000 meters from the cops and an average speed (velocity) of 6 meters/second before he got caught. How long did he run? a) 30,000 seconds b) around 0.23 hour c) around 0.3 hour 4) What is the velocity of a car that traveled a total of 75 kilometers north in 1.5 hours? a) 13 km/h b) 50 m/s c) 13.9 m/s 5) A plane traveled for about 2.5 hours at a speed of 1200 km/hr. What distance did it travel? a) 3000 km b) 30,000 km c) 300 km 6) What is a force? a) a push or pull that causes an object to move, stop, orchange direction. b) a push and pull that causes an object to move, stop, orchange direction. c) a push or pull that only causes an object to move forward or stop. 7) What properties does force have? a) direction b) magnitude (size) c) both are correct 8) The unit that describes the size of a force is a) Joule (J) b) Newton (N) c) Kilograms 9) A feather will fall through the air more slowly than a brick because of ......... a) air resistance b) gravity c) inertia 10) In the absence of air, a penny and a feather that are dropped from the same height at the same time will ........ a) fall at different rates b) fall at the same rate c) float 11) The acceleration due to gravity is ...... a) 9.8 m/s2 b) 9.8 m/s c) 0.98 m/s 12) As you get farther from the center of Earth, your weight will ......... a) decrease b) increase c) remain the same 13) 3 m/s north is an example of a(n) ....... a) speed b) velocity c) acceleration 14) All reactions can be broken down into ..... main types. a) 3 b) 4 c) 5 15) When atoms or molecules join together to make something new. a) combination (synthesis) b) decomposition c) displacement 16) When a molecule is broken down into smaller separate parts. a) combination (synthesis) b) decomposition c) displacement 17) When a particle swaps with another in a molecule. a) combination (synthesis) b) decomposition c) displacement

Grade 8 Physics

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