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Science book 2 > Science Test > Flashcards

Science Test Flashcards

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1
Q

1.Measurements of acceleration are given units of?

A

distance/time2

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2
Q

2.How many centimeters are in a kilometer?

A

100,000

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3
Q

3/A rider finishes a 120 km bicycle trip in 3 hours. The average speed of the rider is?

A

40 km/h 120 divided by 3)

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4
Q

4.An object is in motion if it is relative to a?

A

Reference Point

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5
Q

5.The velocity of an object gives both its speed and?

A

Direction

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6
Q

6.You can calculate an average _____ if you know both the total distance and the total time of a trip?

A

Speed

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7
Q

7.Can an object be accelerating if it has a constant speed?

A

Yes

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8
Q

8.The information needed for describing ____ is distance, time, and direction?

A

Velocity

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9
Q

9.An airplane flies 80 km in 10 minutes and then flies 100 km in 20 minutes. What is the average speed of the airplane?

A

360 km/h

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10
Q

10.If you know the ____ of an object, you also know the direction and movement?

A

velocity

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11
Q

11.T orF -An object is in motion only if its distance from a reference point is changing.

A

True

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12
Q

12.A runner starts a 5 km race at 10:15 am and finishes at 10:35 am. Given this information, you can calculate the runner’s?

A

average speed

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13
Q

13.To determine the speed of an object,divide distance by?

A

time

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14
Q

14.Why is it important to know the velocity an object, not just the speed?

A

direction

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15
Q

15.An airplane that moves 50 meters in one second has a speed of?

A

180,000 m/h (50x60) (3,000x60)

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16
Q

16.Speed measurements are given in units of?

A

distance/time

17
Q

17.A car travels at 25 m/s speeds up to 40 m/s over a period of 15 second. The average acceleration of the car is?

A

1m/h (40-25=15=15/15)

18
Q

18.What is the advantage of using the International System of Units?

A

Everyone uses the same numbers

19
Q

19.Even if an object is moving at a constant speed, how can it accelerate? Give 2 examples.

A

1.) The earth orbiting around the sun. 2.) A tire rotating around its axis. If it’s direction is changing its accelerating.

20
Q

20.You are sitting on a train that is stopped at a station. Use 2 different reference points to explain that the train can appear to be moving and not moving.

A

The wall or pillar. If the train is moving you want to see the wall. If it wasn’t moving the wall would still be there.

Science book 2 (2 decks)

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