Quiz about Science

Question 1

an atom is

Accepted Answer

basic unit of matter

Answer

a non metal

Answer

a metal

Question 2

a neutron has

Accepted Answer

no charge

Answer

positive charge

Answer

negative charge

Answer

all the charges

Question 3

a proton has a

Accepted Answer

positive charge

Answer

negative charge

Answer

no charge

Answer

every charge

Question 4

an electron has

Accepted Answer

a negative charge

Answer

a positive charge

Answer

a neutral charge

Answer

Every charge

Question 5

a bond formed when atoms share one or more pairs of electrons

Accepted Answer

covalent bond

Answer

ionic bond

Answer

no bonds are formed

Answer

both types of bonds are formed

Question 6

the Physical properties of a substance change, but the identity of the substance does not change

Accepted Answer

physical change

Answer

chemical change

Answer

physical charge

Answer

electric charge

Question 7

A combination of chemical symbols and numbers to represent a substance

Accepted Answer

chemical formula

Answer

closed circuit

Answer

chemical mass

Answer

open circuit

Question 8

Number of protons and neutrons

Accepted Answer

atomic mass

Answer

ionic bond

Answer

covalent bond

Answer

element

Question 9

substance made of only 1 atom

Accepted Answer

element

Answer

mixture

Answer

compound

Answer

homogeneous mixture

Question 10

states of matter

Accepted Answer

solid liquid gas

Answer

hydrogen carbon oxygen

Answer

pure mixture

Answer

pure substance

Question 11

what is the definition of chemical change?

Accepted Answer

any change that results in the formation of new chemical substances.

Answer

changing clothes

Answer

matter cannot be created or destroyed, only change form

Answer

changes affecting the form of a chemical substance, but not its chemical composition.

Question 12

Is burning wood a chemical or physical change?

Accepted Answer

chemical

Answer

physical

Question 13

Is hammering wood together to build a house a chemical or physical change?

Accepted Answer

physical

Answer

chemical

Question 14

Which of the following is NOT an example of chemical change?

Accepted Answer

breaking a pencil

Answer

sour milk

Answer

burning wood

Answer

rust

Question 15

Baking a cake by mixing flour, sugar, chocolate powder, eggs, and milk, and then heating them in the oven.

Accepted Answer

Chemical Change

Answer

Physical Change

Question 16

What is the chemical symbol for the element Silicon

Accepted Answer

Si

Answer

S

Answer

si

Answer

Sl

Question 17

What is the chemical symbol for the element Potassium

Accepted Answer

K

Answer

P

Answer

Po

Answer

Pt

Question 18

Is sugar (C₁₂H₂₂O₁₁)an element or a compound?

Accepted Answer

Compound

Answer

Element

Question 19

Water (H₂O) freezing is an example of:

Accepted Answer

A physical change

Answer

A chemical change

Question 20

What is made up two or more elements that are chemically combined?

Accepted Answer

Compound

Answer

Element

Answer

Mixture

Answer

Solids

Question 21

In general, metals are _____.

Accepted Answer

good conductors of heat

Answer

poor conductors of heat

Answer

brittle

Answer

poor conductors of electricity

Question 22

What is H₂SO₄
made up of?

Accepted Answer

2 hydrogen, 1 sulfur, 4 oxygen

Answer

1 hydrogen, 2 sulfur, 4 oxygen

Answer

2 hydrogen & 4 sodium

Answer

1 hydrogen & 6 sodium

Question 23

A change in which one or more substances are converted into new substances is a _______. (SC.8.P.9.2)

Accepted Answer

chemical change

Answer

. physical change

Answer

nuclear reaction

Answer

chemical fusion

Question 24

Which of the following best describes how chemical changes differ from physical changes? (SC.8.P.9.2)

Accepted Answer

Physical changes produce no new substances and chemical changes do.

Answer

Physical changes always involve the formation of a gas while chemical changes may not.

Answer

Physical changes can occur inside or outside the substance; chemical changes always occur outside.

Answer

Physical changes involve a change of state; chemical changes involve a change of shape.

Question 25

Joey is performing an experiment in science class. He mixes two liquids in a test tube, and gas bubbles appear at the surface of the test tube. What type of changes are most likely taking place? How do you know? (SC.8.P.9.2)

Accepted Answer

Chemical change because a gas formed.

Answer

Physical change because you can separate the mixture

Answer

Physical change because it still is a liquid

Answer

Chemical change because he used chemicals

Question 26

Carbon and Oxygen react to form Carbon Dioxide. What are the reactants? (SC.8.P.9.1)

Accepted Answer

Oxygen and Carbon

Answer

Carbon and Dioxide

Answer

Oxygen and Dioxide

Answer

CO2

Question 27

How can the law of conservation of mass apply to a burning log, if all that remains of it is ash? (SC.8.P.9.1)

Accepted Answer

The masses of the gases and water vapor released into the air by the reaction, plus the

ash, equal the mass of the log before burning.

Answer

The ash has the same mass as the log, although a large percentage of it blows away

Answer

The law of conservation of mass applies to changes of state but not to chemical

reactions

Answer

The law of conservation of mass applies to substitution and displacement reactions but not to combustion reactions.

Question 28

During a chemical reaction, matter cannot be __________ or created. (SC.8.P.9.1)

Accepted Answer

Destroyed

Answer

Changed

Answer

Created

Answer

Moved

Question 29

Adding heat to a reaction would_______(SC.8.P.9.3)

Accepted Answer

Cause it to speed up

Answer

Cause it to stop

Answer

Cause it to slow down

Answer

Not effect it at all

Question 30

Which of the following is NOT an example of a chemical change? (SC.8.P.9.3)

Accepted Answer

shape changes

Answer

color changes

Answer

bubbles are produced

Answer

heat or light produced

Question 31

Three examples of physical changes are ______________________.(SC.8.P.9.3)

Accepted Answer

boiling of water, bursting of a balloon, and crumpling a piece of paper

Answer

burning of gasoline, rotting of an egg, and exploding fireworks

Answer

freezing of water, evaporation of gasoline, and rusting a nail

Answer

sawing of wood, crushing a can, and toasting a marshmallow

Question 32

A teacher challenged a group of students to identify an unknown white solid. The students recorded the following results in their investigation. Which of the tests listed above provides evidence of a chemical property of the unknown solid?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 33

In an experiment, 12.0 g of solid carbon, C(s), reacted with oxygen gas, O2(g), to form 44.0 g of carbon dioxide gas, CO2(g).

If all 12.0 g of carbon reacted, how many grams of oxygen reacted with the carbon?

Accepted Answer

32 g

Answer

12 g

Answer

44 g

Answer

56 g

Question 34

Which group of elements on the periodic table has the least reactive elements?

Accepted Answer

Group 18

Answer

Group 1

Answer

Group 2

Answer

Group 17

Question 35

Which of the following rows identifies the three elements present in washing soda, Na2CO3(s)?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 36

Which of the following diagrams best represents molecules of water?

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 37

Which pair of compounds below can be classified as ionic compounds?

Accepted Answer

LiCl(s) and BeF2(s)

Answer

C6H6(l) and BeF2(s)

Answer

C6H6(l) and NO2(g)

Answer

LiCl(s) and NO2(g)

Question 38

The property of metals by which it can be drawn into wires is

Accepted Answer

Ductility

Answer

Malleability

Answer

Sonority

Answer

Lustrous

Question 39

The property of metals by which they can be beaten in to thin sheets is called

Accepted Answer

Malleability

Answer

Sonority

Answer

Ductility

Answer

None of the above

Question 40

The reaction in which heat is absorbed is called ________________ reaction and the reaction in which heat is released is called ________________ reaction.

Accepted Answer

Endothermic, Exothermic

Answer

Neutralization, Precipitation

Answer

Precipitation, Neutralization

Answer

Exothermic, Endothermic

Question 41

To protect iron against corrosion, the most durable metal plating on it, is:

Accepted Answer

Zinc plating

Answer

Nickel plating

Question 42

Iron rust in the presence of:

Accepted Answer

Moisture and Oxygen

Answer

Oxygen

Answer

Vacuum

Answer

Moisture

Question 43

Galvanizing is a process of:

Accepted Answer

Applying a Zinc coating to bare steel

Answer

Washing the body with the phosphate coating

Answer

dipping a body in E-COAT

Answer

Chemically etching primer to steel

Question 44

What are two the two types of pure substances?

Accepted Answer

elements

Accepted Answer

compounds

Answer

heterogenous mixtures

Answer

homogenous mixtures

Question 45

What are two the two types of mixtures?

Accepted Answer

heterogenous

Accepted Answer

homogenous

Answer

elements

Answer

compounds

Question 46

A pure substances ________ be broken down into simpler matter using physical methods.

Accepted Answer

can not

Answer

sometimes

Answer

can

Question 47

What is the simplest kind of pure substance?

Accepted Answer

Element

Answer

Compound

Answer

Homogenous Mixtures

Answer

Heterogenous Mixtures

Question 48

Compounds are make up of.....

Accepted Answer

Multiple types of elements

Answer

One element

Answer

No elements

Question 49

This is a water molecule. It is a ________.

Accepted Answer

Compound

Answer

Element

Answer

Heterogenous Mixture

Answer

Homogenous Mixture

Question 50

T/F: the properties of a compound are JUST like their elemetns.

Accepted Answer

False

Answer

True

Question 51

T/F A mixture is something that CAN be broken down into simpler materials using physical methods.

Accepted Answer

True

Answer

False

Question 52

Why kind of mixture is this? All parts of the mixture are visible because they do not mix together.

Accepted Answer

Heterogeneous

Answer

Homogenous

Answer

Element

Answer

Compound

Question 53

Why kind of mixture is this?

Accepted Answer

Heterogeneous

Answer

Homogenous

Answer

Element

Answer

Compound

Question 54

Why kind of mixture is this? (the sugar in the tea)

Accepted Answer

Homogenous

Answer

Heterogeneous

Answer

Element

Answer

Compound

Question 55

Homogeneous mixtures are also called _______.

Accepted Answer

Solutions

Answer

Heterogenous mixtures

Answer

Problem Solvers

Answer

Water

Question 56

Identify which images are HETEROGENEOUS MIXTURES! (Check all that apply)

Accepted Answer

Option B is correct

Accepted Answer

Option D is correct

Answer

A.

Answer

C.

Question 57

Solutions are ___________ mixtures.

Accepted Answer

Homogenous

Answer

Solid

Answer

Heterogeneous

Answer

Gas

Question 58

Which of the following is classified as a pure substance?

Accepted Answer

Helium

Answer

Lemonade

Answer

Fruit punch

Answer

ketchup

Question 59

Max is hungry and he prepares cereal with milk. This is an example of a:

Accepted Answer

Heterogeneous mixture

Answer

Homogeneous mixture

Question 60

What are the two types of Mixtures

Accepted Answer

Homogenous and Heterogeneous

Answer

Elements and Subatomic Particles

Answer

Protons and Electrons

Answer

Atoms and Compounds

Question 61

What is the atomic mass of Neon?

Accepted Answer

20.18

Answer

10

Answer

10.18

Answer

20.78

Question 62

How many protons are in Beryllium?

Accepted Answer

4

Answer

9

Answer

5

Answer

2

Question 63

How many neutrons are in a Gold atom?

Accepted Answer

118

Answer

79

Answer

196

Answer

275

Question 64

How many electrons does an Iodine atom have?

Accepted Answer

53

Answer

126

Answer

73

Answer

179

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