Science

Question 0

Any chemical change that causes a material to be worn away

Answer 0

Corrosion

Question 1

A chemical change or _______ that takes ease on the atomic level and produces a new substance

Answer 1

Chemical reaction

Question 2

A form of oxidation and corrosion of iron and iron alloys. These undergo chemical reaction when exposed to water and oxygen

Answer 2

Rusting

Question 3

A characteristic of a substance that is observed when it undergoes a chemical change

Answer 3

Chemical property

Question 5

Bonds that are formed when atoms

share electrons. Carbon dioxide is a molecule created by two of these bonds

Answer 5

Covalent bonds

Question 6

The temperature at which a substance changes from the liquid phase to the gas phase.

Answer 6

Boiling point

Question 9

Substances that are made up of only one kind of atom. They cannot be broken down by chemical reactions.

Answer 9

Elements

Question 10

A chart that organizes the known elements by their properties

Answer 10

Periodic table of elements

Question 11

This states that matter cannot be created or destroyed in a chemical
Change; it can only change forms, and the same overall amount if matter is present before and after the chemical change

Answer 11

Conservation of matter

Question 13

The amount of matter (stuff) within a substance or an object. The tool used to measure ______ is the balance scale and the units of measure used for mass are milligrams and grams

Answer 13

Mass

Question 14

This is the temperature at which a substance changes from a solid phase to the liquid phase. This is the same as another point at which a substance changes from a liquid to a solid

Answer 14

Melting point/freezing point

Question 15

The amount of mass of a substance in a specific volume, calculated by mass divided by volume

Answer 15

Density

Question 16

A change that changes the size or shape of a substance, but the physical properties and substance remain the same

Answer 16

Physical change

Question 17

Made up of substances that remain the same substance; they can be separated into their original parts and keep their original properties. Example: salt water can be separated into salt and water

Answer 17

Mixture

Question 18

Attributes of a substance that can be observed or measured that helps to define or identify the substance. These properties include density, melting point, color, texture, shape, size, and solubility.

Answer 18

Physical properties

Question 19

Anything that has mass and volume

Answer 19

Matter

Question 20

The new substance or substances formed in a chemical reaction

Answer 20

Products

Question 21

The starting substance or substances in a chemical reaction

Answer 21

Reactants

Question 22

The ability of a substance to dissolve in water. This is a characteristic property of substances

Answer 22

Solubility

Question 23

A measure of the average kinetic energy of molecules

Answer 23

Temperature

Question 24

The amount of space taken up by a substance or an object,

Regardless of it’s shape. It is measured in units of milliliters (mL) and liter (L).

Answer 24

Volume

Question 27

What is the formula to calculate density?

Answer 27

Density= mass divided by volume

Question 28

Predictable, common patters of air movement due to differences in temperature. Air currents move from cool, high pressure areas to warmer, low-pressure areas

Answer 28

Air currents

Question 30

Bonds that are formed when an atom gives electrons to another atom. Sodium chloride (salt, NaCL) is a compound created by these bonds

Answer 30

Ionic bonds

Question 33

____ are made up of different kinds of elements; the elements that make up the ____ form a new substance with different properties

Answer 33

Compounds

Question 34

The scale used to measure the strength of an acid of a base

Answer 34

The pH scale

Question 35

On the universal pH scale, numbers 4,5,&6 (red, orange and yellow) represent what?

Answer 35

Acids

Question 36

On the universal pH scale, the number 7, (light green) represents what?

Answer 36

Neutral

Question 37

On the universal pH scale, numbers 8,9,&10 (dark green, blue and purple) represent what?

Answer 37

Bases

Question 38

How can you tell if two tonka trucks are made of the same metal?

Answer 38

-Density, everything has their own density

Question 39

I pour kool aid mix in water; what happens to the particles of kool aid?

Answer 39

Dissolve

Question 40

How many atoms Of each type of element are in this compound? C6 H12 O6

Answer 40

6 carbon, 12 hydrogen, and 6 oxygen

Question 41

You leave your garden rake outside. What causes it to rust?

Answer 41

Iron combining with oxygen

Question 42

Why are element considered to be the building blocks of matter?

Answer 42

Everything is made up of one or more atoms (elements)

Question 43

What does an elements location on the periodic table tell us?

Answer 43

-it's properties

Question 44

How are elements different than compounds?

Answer 44

Elements are made up of only 1 type of atom. Compounds are made up of more than one type of atom

Question 45

Productions of a gas, color change, or texture change is a.....

Answer 45

-chemical change

Question 46

Why are atoms neutrally | Charged?

Answer 46

Protons and electrons balance each other out for neutrons

Question 47

What does the law of conservation of matter tell us?

Answer 47

In a chemical reaction no matter is created or destroyed

Question 48

What will I find in the nucleus of an atom?

Answer 48

Protons and neutrons

Question 49

When a positively charged atom bonds with a negatively charged atom what type of bonding it it?

Answer 49

Ionic bond

Question 50

What is A combination of two or more substances that retain their identity?

Answer 50

Mixture

Question 51

When two atoms share electrons if it is a _______ bond?

Answer 51

Covalent

Question 52

Which end of the pH scale would you find a lemon?

Answer 52

Acid (0-6) Bases are above 7 and a neutral is a 7