science chapter 9

Science

Chapter 9

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Choice1 Choice 2 Choice 3 Choice 4

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Row 1, Col 1

Force

A push or a pull

1,2

position

The location of an object

1,3

newtons

The unit used to measure

pushes and pulls

1,4

A change in position

motion

2,1

How fast an object moves over a certain distance

speed

2,2

The length between two places

distance

2,3

A force that occurs when one

object rubs against another

friction

2,4

weight

The measure of the pull of gravity

between an object and the Earth

3,1

A pulling force between two objects,

such as Earth and you

gravity

3,2

A unit of measurement in the English system

pound

3,3

Scientists measure weight in this

newtons

3,4

gravity

Things fall to Earth because

they are pulled by Earth’s _________.

4,1

C

A B C D In which picture has the symbol changed direction?

4,2

Julie

05

101520253035404550

Metersper

second

RonFredJulie

Who ran the race in the shortest time?

4,3

Why is it hard to skate on a gravel road?

The gravel increases friction.

4,4

speed

You need time and distance to measure ______.

5,1

If an adult runs 4 miles in an hour,

how far will he run in an hour and a half?

6 miles

5,2

.

Since the beach ball is larger than baseball, it has more surface area. Friction from the wind keeps

the beach ball from going as far as the baseball. The weight of the ball also affects the distance because it would add allow the ball to have more force to resist

friction and gravity.

Josh goes to the beach. He throws a baseball. It travels 25 feet. He throws a beach ball.

It travels 5 feet. Why does the large beach ball travel less than the baseball?

5,3

If you are in outer space,

and you throw a beach ball,

how far will it travel?

The beach ball will keep going until it is slowed down by friction

from the air or pulled down by gravity.

5,4

You hypothesize that your new pair of skates

is faster than your old pair.

How can you test your hypothesis?

You must test each pair the exact same way.

You must go the same direction on the samecourse for the same distance. You must use the same amount of force. The weather and wind

should be the same. You must time how long it takes to finish the course wearing each pair of skates.