science test 2

Question 1

weight

Answer 1

the force of gravity acting on an object

Question 2

weight =

Answer 2

gravity

Question 3

mass

Answer 3

the amount of matter that makes up a substance

Question 4

how to measure mass ?

Answer 4

scale

Question 5

list 3 ways to find volume

Answer 5

1. l x w x h / length x width x height
2. displacement method
3. displacement if water overflowing

Question 6

volume

Answer 6

the amount of space an object or substance takes up

Question 7

what units used to measure volume

Answer 7

1. cm3 / centimetres cubed
2. mL / mililitres
3. L / litres
4. kL / kilolitres cubed
5. cL / centilitres

Question 8

density

Answer 8

a measure of the mass per unit volume of a substance

Question 9

most —-> least dense

Answer 9

1. solid
2. liquid
3. gas

Question 10

does oil have more or less density than water ?

Answer 10

oil has less density than water thats why it floats on water

Question 11

does helium have more or less density than air?

Answer 11

less

Question 12

density =

Answer 12

mass divided by volume

Question 13

bouyancy

Answer 13

the ability of an object to float

Question 14

more bouyance

Answer 14

float :)

Question 15

less buoyancy

Answer 15

sink :(

Question 16

swim bladder

Answer 16

a controllable balloon - like chamber that allows fish to alter their buoyancy

Question 17

MORE OXYGEN IN FISH BLADDER

Answer 17

UP

Question 18

LESS OXYGEN IN FISH BLADDER

Answer 18

DOWN

Question 19

positive buoyancy

Answer 19

objects float upwards

Question 20

negative buoyancy

Answer 20

objects sink

Question 21

neautral buoyancy

Answer 21

object remains in one place