science flashcards

Question 1

Matter can be..

Answer 1

a solid, liquid, and gas

Question 2

What is Matter

Answer 2

anything that takes up space (volume.)

Question 3

Weight

Answer 3

Amount of gravitational pull on an object

Question 4

Weight depends on what

Answer 4

It depends on the mass of the planet

Question 5

How much does weight on the moon compare to weight on earth

Answer 5

anything on the moon weight’s is 1/6 of Earth’s.

Question 6

Example: 1/6 x 300/1 =

Answer 6

50 lbs or pounds

Question 7

Does Mass or Weight change, and do scientists use weight as a measurement?

Answer 7

weight changes on the gravitational pull of an object, therefore scientists do not use it, mass does not change

Question 8

1 kg =

Answer 8

22 pounds

Question 9

1 kg =

Answer 9

1000 g

Question 10

what formula would you do when calculating weight, length and height?

Answer 10

length x width x height

Question 11

What is density?

Answer 11

how much space an object or substance takes up (its volume) in relation to the amount of matter in that object or substance (its mass). Another way to put it is that density is the amount of mass per unit of volume.

Question 12

What temperature is h2o the densest

Answer 12

4 degrees celcius

Question 13

Why is water the ‘exception’ for density?

Answer 13

Because, water freezes at 0 C, and becomes solid. The more dense object sinks, and the less floats. For example, in a pond full of h2o, only the top layer freezes, but stays there since water is more dense.

Question 14

What would happen if water was less dense than ice?

Answer 14

the ice would keep sinking, and new water would go to the top, and freeze, and so on.. killing all the organisms that live in that pond.

Question 15

Density is

Answer 15

mass x volume

Question 16

Physical properties or not?

Answer 16

mass and density are both physical properties. Every substance has its own density.

Question 17

what is the exception for what can change density

Answer 17

temperature can change the density of an object. if you increase the temperature, density decreases, and if you decrease the temperature, the density increases.