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Ch.9 How Things Move
Question | Answer |
---|---|
If you add _____ to an open door, it moves. | force |
The location of an object is its ________. | position |
What is caused by an object rubbing against another object? | friction |
When an object changes position, it is in ______. | motion |
The pull of gravity determines the ______ of an object. | weight |
Scientists measure weight in _______. | newtons |
The length between two places is called ______. | distance |
A _____ is a unit of measurement in the English system. | pound |
What causes things to fall to Earth? | gravity |
What do we use to measure how fast something moves? | speed |
A skier changes direction when they change _______. | positions |
In order to have the shortest time, you have | to run the farthest in shortest time |
Why is it hard to skate on a gravel road? | gravel increases friction |
What measurements are needed to measure speed? | time and distance |
What will slow down an object? | friction |
If you run 4 miles in an hour, how far can you run in 1-1/2 hours? | 6 miles |
If you run 12 miles in an hour, how far can you run in 1-1/2 hours? | 18 miles |
What direction would you travel to go from Illinois to Florida? | South |
What 2 properties would cause a beach ball to travel a shorter distance than a baseball? | surface area and friction |
If you pick up a bowling ball, football, and golf ball, how do you know a bowling ball weights the most? | takes more force to pick up bowling ball |
If you throw a ball in space, how far will it travel? | forever |