Science test 2

Question 1

What are Physical properties?

Answer 1

Properties we can observe with our senses

• Density
• Shape
• Viscosity

Question 2

What are Chemical properties?

Answer 2

A substances ability to interact with another substance

• Temperature
• Precipitate
• Combustibility

Question 3

What is Solubility? What is Reactivity?

Answer 3

The ability for a Solute to dissolve in a solvent. Two substances reacting to create a new one.

Question 4

What is a Physical change?

Answer 4

Change in state or shape of a substance.

Question 5

What is a chemical change?

Answer 5

Change in identity and substance of original materials.

Question 6

What questions should you ask to find out what change it is?

Answer 6

Is it a new substance?

Is it reversable?

Question 7

Hints of chemical change….

Answer 7

Bubbling,
Gas formed
Heat or light being given off
Precipitate formed
Hard to reverse

Question 8

What is matter?

Answer 8

Anything that has mass and takes up space

Question 9

What is measure of quantity done with?

Answer 9

kg, g

Question 10

Weight is the measure of the pull of gravity, how is volume measured?

Answer 10

l, ml

Question 11

What are the changes of state thoughout the states of matter?

Answer 11

Sublimation, depostition, evaporation, condensation, melting, freezing,

Question 12

Solid

Shape =
Volume =

Answer 12

Constant

Constant

Question 13

Liquid

Shape =
Volume =

Answer 13

Changes

Constant

Question 14

Gas

Shape =
Volume =

Answer 14

Changes

Changes

Question 15

When being heated energy is ________ When cooling down energy is ________

Answer 15

Absorbed Released

Question 16

Particle Theory ….

Answer 16

1 - All matter is made of particles
2- All particles of one substance are the same, different substances have different substances have different particles.
3 - The spaces between paricles are large compared to the size of the particle
4 - Particles are always moving, the more energy they have the faster they move
5 - There are attractive forces between particles, the closer they are the stronger the forces.

Question 17

Matter is made up of ________ and ____ ________ which are made of …

Answer 17

Pure substances and mixtures, Mixtures are made up of homogenous and heterogenous mixtures, pure substances are made up of Elements and Compounds

Question 18

Pure substance is ______ Mixtures are _________

Answer 18

One type of particle ( a pure substance cannot be seperated ) / Multipule substances

Question 19

The smallest building block is an ______

Answer 19

atom

Question 20

A solution is _____ a colloid is _____

Answer 20

A clear mixture which light flows through / A cloudy mixture which light can’t pass through

Question 21

A diatomic atom is …

Answer 21

Two atoms composed to the same element

Question 22

A Homogenous Mixture is …

Answer 22

A uniform mixture where the different substances are not apparent

Question 23

A Heterogenous mixture is …

Answer 23

More than one substance not chemically bonded
Different mixtures are visible
They can be seperated

Question 24

Suspention is when …

Answer 24

Mixtures are combined at first but layer after time.

Question 25

what is HOFBRINCL

Answer 25

Hydrogen, Oxygen, Fluorine, Bromine, Iodine, Nitrogen, Chlorine