Directions: Review and check all your answer with this answer sheet to get ready for the test on Chemistry of Matter
(Chapter 2 & 3). Enjoy.
1.
What tinny, tiny things make up all the elements on the periodic table? ATOMS
2.
What one particle ( protons, neutron, electron ) determine one element from another? PROTONS
3.
If something takes up space (has volume) and has mass it must be ____________. MATTER
4.
When atoms combine, they do so by forming a _________ bond. CHEMCIAL
5.
A ______ is a group of two or more atoms held together by chemical bonds. MOLECULE
6.
A ______ is a pure substance made of two or more elements chemically combined in a set ratio. COMPOUND
7.
A ______ is a single kind of matter that is pure, meaning it always has a specific makeup, and a specific set of properties and is the same everywhere. SUBSTANCE
8.
When two or more substances are physically combined (not chemically), they form a ______. MIXTURE
9.
In a ______ mixture, you can see the different parts. HETEROGENOUS
10.
The substances in a ______ mixture are so evenly mixed that you can’t see the different parts. HOMOGENOUS
11.
A ______ ______ is any change that alters the form or appearance of matter, but does not make any new substance. PHYSICAL CHANGE
12.
What forms when elements chemically combine with one another? (hint: they start with the letter “c”)
COMPOUNDS
13.
Water (H
2
0), Carbon Dioxide (CO
2
), and Methane (CH
4
) are examples of _____________ since two or more different elements chemically combine. COMPOUNDS
14.
What two elements make up table salt (NaCl)? SODIUM (Na) & CHLORINE (Cl)
15.
What elements make up rust (Fe
2
O
3
)? Is rust a mixture, compound or element? IRON (2 ATOMS) AND OXYGEN (3
ATOMS) A COMPOUND
16.
__________ have atoms that are close together and have a defined shape while ____________ have atoms that are more spread out freely moving around and tend to take the shape of the container they are in and ________ tend to have atoms that are really far apart and completely fill the entire container they are placed in. SOLIDS, LIQUIDS,
GASES
17.
An ____________ solid has not definite shape (it acts like a liquid and a solid) while a ______________ solid has regular, repeating patterns (like NaCl). AMORPHOUS, CRYSTALLINE
18.
When atoms combine (products of a chemical reaction) they form what? NEW SUBSTANCES OR COMPOUNDS
19.
Can you create or destroy matter? What percent is destroyed during a chemical reaction? NO ZERO

20.
Why sometimes is water: solid (ice), liquid (liquid water), and gas (steam)? DEPENDS ON ENERGY (HEAT) AND HOW
MUCH (FAST) THE H
2
O (WATER) MOLECULES ARE MOVING
21.
Is the melting of ice a chemical or physical change? Do bonds break between the hydrogen and oxygen atoms?
PHYSICAL CHANGE, NO BONDS BREAK
22.
How can you make particles move faster? In other words, how can you change ice into liquid water? ADD HEAT
(ENERGY) TO THE WATER MOLECULES AND CAUSE IT TO CHANGE STATE (PHASE CHANGE) FROM SOLID TO LIQUID
23.
Steel melting is an example of which (chemical reaction, phase change or a physical change)?
PHYSICAL CHANGE
AND A PHASE CHANGE– (MELTING)
24.
Paper burning is an example of which (chemical reaction, phase change or a physical change)? CHEMICAL REACTION
AND PHYSICAL CHANGE
25.
What state(s) of matter flow? LIQUIDS AND GASES
26.
What is the central part of the atom called (the place where protons and neutrons are found)? NUCLEUS
27.
What are positive charge particles in the nucleus called? PROTONS
28.
What are neutrally charged particles in the nucleus called? NEUTRONS
29.
What charge does an electron have? NEGATIVE
30.
Copy down the picture below and fill in the arrows .
: Which has the greatest viscosity? (water, liquid nitrogen, or honey) HONEY – it has the greatest resistance to flow. Liquid nitrogen and water have low viscosity (they flow pretty easily)