6.3 Density Flashcards

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1
Q

What are some physical properties of substances?

A

The appearance
The temperature at which it melts, freezes and boils
It’s hardness (how easy it is to scratch the material)

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2
Q

What does density depend on?

A

It depends on how heavy a substance is but not the same weight/mass. It measures ow much matter is packed into a space

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3
Q

What is densities measured in?

A

Grams per cubic cm

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4
Q

Which is more dense, solid or liquid?

A

Solid because they are usually more packed in than liquids

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5
Q

What is the least dense out of the three states?

A

Gas

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6
Q

What happens to the density when a gas is heated?

A

It becomes less dense because the particles are more spread out

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7
Q

What is more dense, hot air or cold air?

A

Cold air

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8
Q

Will a dense object float or sink?

A

Sink

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9
Q

What does mass measure?

A

It measured how much matter is in a substance

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10
Q

What is mass sometimes incorrectly referred to as?

A

Weight

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11
Q

How is mass measured?

A

By using a beam balance or electric balance

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12
Q

What is volume?

A

The amount of space an object takes up

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13
Q

How can regular solids be measured?

A

By measuring dimensions rather than using an appropriate mathematical formula. It is measured in mm3, cm3, m3,

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14
Q

How are liquids measured?

A

They are measured accurately by using a measuring cylinder, it is easy to convert between mL and cm3 because 1mL = 1cm3

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15
Q

How are irregular solids formed?

A

Drop them in a measuring cylinder and compare the water levels

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16
Q

How do you calculate density?

A

Density= mass/volume

17
Q

Why do icebergs float?

A

Because they are less dense than water

18
Q

Why are icebergs dangerous to ships?

A

They shift with the oceans and winds, often move to shipping lanes and 80-90% is hidden below surface

19
Q

How can ships try to help from crashing into icebergs?

A

By using a radar