Material World

Question 1

The amount of matter contained in an object is the ______

Answer 1

Mass

Question 2

The amount of space occupied by an object is the ______

Answer 2

Volume

Question 3

The heaviness of an object as the result of gravity is known as the ____

Answer 3

Weight

Question 4

What is an atom?

Answer 4

Smallest part of a chemical element

Question 5

What is a molecule?

Answer 5

A group of two or more chemically bonded atoms

Question 6

What is an element?

Answer 6

A pure substance that can’t be divided into smaller parts

Question 7

List the 4 main parts of daltons atomic model

Answer 7

1. All matter is made of atoms
2. All atoms of the same element are identical
3. Atoms of different elements are different
4. During chemical reactions, atoms separate, combine or rearrange to form new substances

Question 8

What are elements located to the right of the step-like line called?

Answer 8

Non-metals

Question 9

What are elements located the left of the step-like line called?

Answer 9

Metals

Question 10

____ are elements possessing properties both of metals and non-metals

Answer 10

Metalloids

Question 11

Why are substances like H2O and bronze not found on the periodic table?

Answer 11

Because they’re considered molecules since they have more than one element

Question 12

(True/False) an atom is divisible

Answer 12

True

Question 13

(True/False) an elements chemical symbol always starts with a lowercase

Answer 13

False

Question 14

(T/F) an elements chemical symbol is the same in every language

Answer 14

True

Question 15

(T/F) An elements chemical symbol always have 2 letters

Answer 15

False

Question 16

(T/F) the periodic table sorts the elements based on their atomic number and their physical and chemical properties

Answer 16

True

Question 17

(T/F) Hydrogen belongs to its own group. It’s a one of a kind element

Answer 17

True

Question 18

(T/F) Molecules can be created by combining the same element or different elements

Answer 18

True

Question 19

(T/F) all atoms of the same element are identical and have the same mass and properties

Answer 19

True

Question 20

What does daltons atom model of H2O look like?

Answer 20

Two small circles of h with a big circle of O connecting them like a triangle

Question 21

Why is dihydrogen called a molecule?

Answer 21

A molecule has 2 or more atoms, dihydrogen has two, meaning its a molecule

Question 22

What is physical change? Are they reversible?

Answer 22

Transformation that doesn’t change the chemical composition or the characteristics of a substance. Considered reversible

Question 23

Name 4 physical changes with an example for each

Answer 23

1) phase change(ice to water)
2) shape change(ripping paper)
3) preparing a mixture( adding food dye to icing)
4) separation of a mixture( using strainer to remove food from water)

Question 24

What is a chemical change? Are they reversible?

Answer 24

Transformation that change chemical makeup of a substance, therefore altering its characteristic properties. Considered irreversible

Question 25

What are the 5 indicators of a chemical change?

Answer 25

1. Creation of gas
2. Creation of solid
3. Color change
4. Change in temperature
5. Emission of light

Question 26

What are the 4 types of a chemical change with examples for each

Answer 26

1. Synthesis(photosynthesis)
2. Combustion(burning paper)
3. Decomposition (cellular respiration)
4. Oxidization(iron rusting)

Question 27

Indicate whether it’s a physical or chemical change
Grinding ground pepper

Answer 27

Physical

Question 28

Indicate whether it’s a physical or chemical change
Grinding ground pepper

Answer 28

Physical

Question 29

Indicate whether it’s a physical or chemical change
Mixing sugar cubes with fine sugar

Answer 29

Physical

Question 30

Indicate whether it’s a physical or chemical change

Mixing flour with water

Answer 30

Chemical

Question 31

Indicate whether it’s a physical or chemical change

Baking cookies

Answer 31

Chemical

Question 32

Indicate whether it’s a physical or chemical change

Baking cookies

Answer 32

Chemical

Question 33

Indicate whether it’s a physical or chemical change

Ice melting

Answer 33

Physical

Question 34

Indicate whether it’s a physical or chemical change

Oxygen and metal which creates rust

Answer 34

Chemical

Question 35

Indicate whether it’s a physical or chemical change

Adding food colouring to water

Answer 35

Physical

Question 36

Indicate whether it’s a physical or chemical change

Fireworks

Answer 36

Chemical

Question 37

A glass of water sealed with a lid is put in the freezer. After it’s frozen, you remove the glass and noticed that the volume has decreased. Was matter lost? How would you explain it to someone to see if matter was lost?

Answer 37

Matter was not lost since it was sealed so nothing could escape. To tell measure the matter before and after.