Thursdays

Question 1

What is the chemical formula for water?

Answer 1

H2O

Question 2

True or False: Helium is a metal.

Answer 2

False

Question 3

Fill in the blank: The smallest unit of an element is called a ______.

Answer 3

atom

Question 4

What is the pH range of acids?

Answer 4

0 to 6

Question 5

What is the process by which plants make their own food?

Answer 5

photosynthesis

Question 6

Which gas do plants absorb during photosynthesis?

Answer 6

carbon dioxide

Question 7

Multiple Choice: What is the main gas in the Earth’s atmosphere? A) Oxygen B) Nitrogen C) Carbon Dioxide

Answer 7

B) Nitrogen

Question 8

What is the term for a substance made of two or more elements chemically bonded together?

Answer 8

compound

Question 9

True or False: All metals are solid at room temperature.

Answer 9

False

Question 10

What is the atomic number of carbon?

Answer 10

6

Question 11

Fill in the blank: The ______ is the center of an atom.

Answer 11

nucleus

Question 12

What state of matter has a definite shape and volume?

Answer 12

solid

Question 13

Multiple Choice: Which of the following is a noble gas? A) Oxygen B) Argon C) Nitrogen

Answer 13

B) Argon

Question 14

What is the term for the ability of a substance to be drawn into thin wires?

Answer 14

ductility

Question 15

True or False: Acids taste sour.

Answer 15

True

Question 16

What is the chemical symbol for sodium?

Answer 16

Na

Question 17

Fill in the blank: The process of a liquid turning into a gas is called ______.

Answer 17

evaporation

Question 18

What is the main component of natural gas?

Answer 18

methane

Question 19

Multiple Choice: Which of the following is an alkaline earth metal? A) Sodium B) Magnesium C) Iron

Answer 19

B) Magnesium

Question 20

What is the term for a mixture that has a uniform composition throughout?

Answer 20

homogeneous mixture

Question 21

True or False: The chemical formula for table salt is NaCl.

Answer 21

True

Question 22

What is the primary gas produced by burning fossil fuels?

Answer 22

carbon dioxide

Question 23

Fill in the blank: A ______ reaction is one that releases energy.

Answer 23

exothermic

Question 24

What is the term for the number of protons in the nucleus of an atom?

Answer 24

atomic number

Question 25

Multiple Choice: Which of the following is not a property of metals? A) Conductivity B) Brittleness C) Malleability

Answer 25

B) Brittleness

Question 26

What is the chemical formula for carbon dioxide?

Answer 26

CO2

Question 27

True or False: Water is a polar molecule.

Answer 27

True

Question 28

What is the process called when a solid turns directly into a gas?

Answer 28

sublimation

Question 29

Fill in the blank: The ______ is the outermost part of an atom where electrons are found.

Answer 29

electron cloud

Question 30

What is the chemical symbol for iron?

Answer 30

Fe

Question 31

Multiple Choice: Which of the following is an example of a physical change? A) Rusting B) Melting C) Burning

Answer 31

B) Melting

Question 32

What is the term for the amount of matter in an object?

Answer 32

mass

Question 33

True or False: Chlorine is a non-metal.

Answer 33

True

Question 34

What do you call a substance that speeds up a chemical reaction?

Answer 34

catalyst

Question 35

Fill in the blank: The ______ scale measures the acidity or alkalinity of a solution.

Answer 35

pH

Question 36

What is the chemical formula for glucose?

Answer 36

C6H12O6

Question 37

Multiple Choice: Which of the following is a property of bases? A) Bitter taste B) Sour taste C) Sweet taste

Answer 37

A) Bitter taste

Question 38

What is the term for a solution that has a pH greater than 7?

Answer 38

alkaline

Question 39

True or False: All gases are invisible.

Answer 39

False

Question 40

What is the primary element in organic compounds?

Answer 40

carbon

Question 41

Fill in the blank: A ______ is a substance that cannot be broken down into simpler substances.

Answer 41

element

Question 42

What is the chemical symbol for potassium?

Answer 42

K

Question 43

Multiple Choice: Which of the following elements is a halogen? A) Oxygen B) Fluorine C) Neon

Answer 43

B) Fluorine

Question 44

What is the term for the change of state from gas to liquid?

Answer 44

condensation

Question 45

True or False: The atomic mass of an element is the total number of protons and neutrons.

Answer 45

True

Question 46

What is the main component of air?

Answer 46

nitrogen

Question 47

Fill in the blank: An ______ is a positively charged ion.

Answer 47

cation

Question 48

What is the chemical formula for sulfuric acid?

Answer 48

H2SO4

Question 49

Multiple Choice: Which of the following is a characteristic of nonmetals? A) Good conductors of heat B) Dull appearance C) Malleable

Answer 49

B) Dull appearance

Question 50

What is the term for the energy required to start a chemical reaction?

Answer 50

activation energy

Question 51

True or False: All liquids have a definite volume but no definite shape.

Answer 51

True

Question 52

What is the chemical symbol for gold?

Answer 52

Au

Question 53

Fill in the blank: The ______ is the part of the atom that has a negative charge.

Answer 53

electron

Question 54

What is the process of a liquid turning into a solid called?

Answer 54

freezing