Question

name:
date:

1. matter is anything that has mass and occupies what?

a) light
b) space
c) time
d) sound

1. what is the smallest unit of an element (shown in the diagram)?

a) cell
b) atom
c) water
d) gas

1. which of these is an example of an element?

a) water
b) salt
c) oxygen
d) salad

1. water (h2o) is made of two or more elements combined. this makes it a:

a) compound
b) atom
c) element
d) solid

1. a mixture that looks the same throughout (like salt water) is called:

a) heterogeneous
b) homogeneous
c) pure
d) solid

1. a mixture that is not uniform (like a salad) is called:

a) homogeneous
b) heterogeneous
c) compound
d) element

1. when a new substance is formed (like when an apple rots), it is a:

a) physical change
b) state change
c) chemical change
d) size change

1. melting ice into liquid water is a:

a) chemical change
b) physical change
c) burning
d) rusting

1. the starting substances in a chemical reaction are called:

a) products
b) reactants
c) mixtures
d) gases

1. the substances formed at the end of a reaction are called:

a) reactants
b) elements
c) products
d) atoms

name:
date:

1. an acid has a ph level that is:

a) exactly 7
b) above 7
c) below 7
d) exactly 14

1. a base has a ph level that is:

a) below 7
b) above 7
c) exactly 7
d) exactly 0

1. the law of conservation of mass states that matter cannot be created or:

a) moved
b) heated
c) destroyed
d) changed

part 3: multiple choice - unit 2 (energy)

1. energy is defined as the ability to do:

a) math
b) work
c) nothing
d) sleep

1. kinetic energy is the energy of:

a) resting
b) heat
c) motion
d) light

1. potential energy is energy that is:

a) moving
b) stored
c) hot
d) cold

1. thermal energy is also known as:

a) heat energy
b) light energy
c) sound energy
d) wind energy

1. which of the following is a renewable resource?

a) coal
b) wind
c) oil
d) natural gas

1. which of the following is a non-renewable resource?

a) solar
b) wind
c) hydro
d) coal

Explanation:

Identify matter properties

Matter is defined as anything that has mass and takes up space (volume).

• Question 11: Space is the correct choice.

Identify atomic structure

The smallest unit of an element that retains its properties is an atom.

• Question 12: Atom is the correct choice.

Classify substances

Oxygen is a pure substance consisting of only one type of atom, making it an element. Water (\(\text{H}_2\text{O}\)) is a compound.

• Question 13: Oxygen is the element.
• Question 14: Water is a compound.

Classify mixtures

A mixture with a uniform composition throughout is homogeneous. A mixture that is not uniform is heterogeneous.

• Question 15: Homogeneous is the correct choice.
• Question 16: Heterogeneous is the correct choice.

Distinguish chemical and physical changes

A chemical change results in the formation of new chemical substances. A physical change alters the form of a substance without changing its chemical identity.

• Question 17: Chemical change is the correct choice.
• Question 18: Physical change is the correct choice.

Identify reaction components

In a chemical reaction, the starting substances are reactants, and the substances formed at the end are products.

• Question 19: Reactants is the correct choice.
• Question 20: Products is the correct choice.

Determine pH levels

Using the pH Scale concept, acids have a pH level below 7, while bases have a pH level above 7.

• Question 21: Below 7 is the correct choice.
• Question 22: Above 7 is the correct choice.

Apply conservation laws

Using the Law of Conservation of Mass concept, matter cannot be created or destroyed in a chemical reaction.

• Question 23: Destroyed is the correct choice.

Define energy forms

Energy is defined as the ability to do work. Kinetic energy is the energy of motion, while potential energy is stored energy. Thermal energy is also known as heat energy.

• Question 24: Work is the correct choice.
• Question 25: Motion is the correct choice.
• Question 26: Stored is the correct choice.
• Question 27: Heat energy is the correct choice.

Classify resources

Renewable resources can replenish naturally in a short time (e.g., wind). Non-renewable resources exist in finite amounts and cannot be easily replaced (e.g., coal).

• Question 28: Wind is a renewable resource.
• Question 29: Coal is a non-renewable resource.

Answer:

Question 11

• A) Light
• B) Space (Correct answer)
• C) Time
• D) Sound

Question 12

• A) Cell
• B) Atom (Correct answer)
• C) Water
• D) Gas

Question 13

• A) Water
• B) Soil
• C) Oxygen (Correct answer)
• D) Salad

Question 14

• A) Compound (Correct answer)
• B) Atom
• C) Element
• D) Solid

Question 15

• A) Heterogeneous
• B) Homogeneous (Correct answer)
• C) Pure
• D) Solid

Question 16

• A) Homogeneous
• B) Heterogeneous (Correct answer)
• C) Compound
• D) Element

Question 17

• A) Physical change
• B) State change
• C) Chemical change (Correct answer)
• D) Size change

Question 18

• A) Chemical change
• B) Physical change (Correct answer)
• C) Burning
• D) Rusting

Question 19

• A) Products
• B) Reactants (Correct answer)
• C) Mixtures
• D) Gases

Question 20

• A) Reactants
• B) Elements
• C) Products (Correct answer)
• D) Atoms

Question 21

• A) Exactly 7
• B) Above 7
• C) Below 7 (Correct answer)
• D) Exactly 14

Question 22

• A) Below 7
• B) Above 7 (Correct answer)
• C) Exactly 7
• D) Exactly 0

Question 23

• A) Moved
• B) Heated
• C) Destroyed (Correct answer)
• D) Changed

Question 24

• A) Math
• B) Work (Correct answer)
• C) Nothing
• D) Sleep

Question 25

• A) Resting
• B) Heat
• C) Motion (Correct answer)
• D) Light

Question 26

• A) Moving
• B) Stored (Correct answer)
• C) Hot
• D) Cold

Question 27

• A) Heat energy (Correct answer)
• B) Light energy
• C) Sound energy
• D) Wind energy

Question 28

• A) Coal
• B) Wind (Correct answer)
• C) Oil
• D) Natural Gas

Question 29

• A) Solar
• B) Wind
• C) Hydro
• D) Coal (Correct answer)