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What is the independent variable?
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What is the dependent variable?
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Science 9 Exam
| Question | Answer |
|---|---|
| What is the independent variable? | the variable that is purposely changed in an experiment |
| What is the dependent variable? | the variable that is recorded in an experiment (what's in the data table?) |
| What is the controlling variable? | the variable that is purposely kept the same in an experiment |
| How many sigfigs are in 0.0056700? | 5 |
| How many sigfigs are in 3450760? | 6 |
| A person always walks 1 mile every day for exercise, leaving her front porch at 9:00am and returnring to her front porch at 9:25am. What is her total displacement? A. 1 mile B. 0 C. 25 minutes D. none of the above | B. 0 |
| Displacement vectors of 4km S, 2km N, 5km S, and 5km N combine to a total displacement of A. 16 km N B. 11 km W C. 6 km S D. 2km S | D. 2 km S |
| A speed-time graph shows that a car moves at 10m/s for 10s. The car's speed then decreases until it comes to a stop at 30s. Which of the following describes the slope of the speed-time graph from 10s to 30s? A. curved, up B. liner, sloping down | B |
| The gravitational force between two objects increases as mass A. decreases or distance decreases B. decreases or distance decreases C. increases or distance decreases D. increases or distance increases | C. |
| Which of the following is NOT an action/reaction force pair? A. the force between a bat and a ball B. the orce between a ball and the Earth C. the force of propulsion and the forcce of gravity on an airplane D. the force between grasshopper & ground | C. |
| During a head-on collision, BLANK (1), causes a passenger to keep moving BLANK (2). | BLANK (1): Inertia BLANK (2): forward |
| If a block has 5J of kineti energy, how much work did the force that acted on it do om the block? Why? | 5J, work is the ability to do work so the values are equal |
| If no friction acts on a diver during a dive, which of the following is true? A. The total mechanical energy of the system increses B. PE can be converted into KE, but not vice versa. C. KE+PE(beginning) = KE+PE(end) D. all of the above | C. |
| What is energy and work measured in? | joules |
| As the temperature of an object rises, so does the A. kinetic energy B. mass C. thermal energy D. potential energy | C. thermal energy |
| What three things does the amount of thermal energy depend on? | mass, phase (solid, liquid, gas), temperature |
Created by:
alissaray19