Science Unit Test 1

Question 1

5 parts of the Particle Theory

Answer 1

• All matter is made up of very small particles
• There is space between the particles
• All particles in a pure substance are the same
• The particles in matter are always in motion
• Particles are attracted to eachother

Question 2

What can a heterogeouns also be called

Answer 2

A mixture

Question 3

what 2 things define a pure substance

Answer 3

• made up of only one particle

- cannot be sepersted physically

Question 4

What is the particle Theory

Answer 4

Explains how all matter is structered and how it behaves under certains circumstances

Question 5

What is a particle made up if two or more atoms boned together called

Answer 5

molecule

Question 6

What is the simpeliest form if matter

Answer 6

atom

Question 7

What type of mixture can you see the different parts

Answer 7

heterogeneous mixture

Question 8

what mixture can you not see the different parts in

Answer 8

homogeneous mixture

Question 9

what are some physical properties

Answer 9

color, odour, texture, lustre, taste, clarity

Question 10

What is the definition of density

Answer 10

the amount if matter within a certain volume

Question 11

what are some chemical properties

Answer 11

reactivity, sensitivity to light, combusility

Question 12

what are some physical changes

Answer 12

melting and boiling, freezing, condensation, evaporation

Question 13

what are some chemical changes

Answer 13

burning, cooking, rusting

Question 14

how to know a chemical change has occured

Answer 14

• a new color has appeared
• heat or light is released
• bubbles of gas formed
• solid forms a liquid
• irreversible

Question 15

pure substance

Answer 15

made up of only one type of particle, cannot be separated

Question 16

compound

Answer 16

also called molecules, made of different elements attached together

Question 17

elements

Answer 17

made up of only one type of atom, found on the periodic table

Question 18

mixture

Answer 18

made up of two or more pure substances can be seperated

Question 19

what is another word for a homogeneous mixture

Answer 19

a solution

Question 20

what are two types of mixtures

Answer 20

homogeneous & heterogeneous

Question 21

what does solubility mean

Answer 21

the ability to dissolve

Question 22

what is viscosity

Answer 22

the abilty a liquid flows

Question 23

what is a melting and boiling point

Answer 23

a tempature where a state change occurs

Question 24

what dies malleabilty mean

Answer 24

the ability to be bend

Question 25

what does combustility mean

Answer 25

the ability to catch flame

Question 26

5 different elements

Answer 26

• iron
• silver
• uranium
• gold
• neon

Question 27

5 different compounds

Answer 27

• sugar
• gasoline
• baking powder
• baking soda
• carbon dioxide

Question 28

5 different mixtures

Answer 28

dirt, milk, paint, ink, lemonade

Question 29

Chemical property definiton

Answer 29

changes into a new substance

Question 30

Physical change defintion

Answer 30

original substance remains the same onky changing state ir form

Question 31

chemical change defintion

Answer 31

new substance or multiple substances are made