Quiz about Physical Science: Second Semester Test

Question 1

The Law of Conservation of Mass says: "During a chemical reaction, mass is neither _______ nor destroyed."

Accepted Answer

Created

Answer

Melted

Answer

burned

Question 2

The substances that go into a reaction are called the _______.

Accepted Answer

Reactants

Answer

products

Question 3

Balance this equation: Cu₅+ S₅ --> ___ CuS

Accepted Answer

5

Answer

3

Answer

4

Question 4

In an endothermic reaction, energy is __________.

Accepted Answer

Absorbed

Answer

released

Question 5

_____ reactions usually feel hot!

Accepted Answer

Exothermic

Answer

endothermic

Question 6

____ reactions usually feel cold.

Accepted Answer

Endothermic

Answer

exothermic

Question 7

Endo means in or _______.

Accepted Answer

absorbed

Answer

Released

Question 8

Exo means out or

Accepted Answer

released

Answer

Absorbed

Question 9

A temperature increase causes the particles

Accepted Answer

move faster

Answer

to slow down

Answer

collide higher

Question 10

How does a catalyst work in speeding up a reaction?

Accepted Answer

By lowering the activation energy or reaction

Answer

by making them more available

Answer

by giving them more energy

Question 11

When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in

Accepted Answer

Chemical Equilibrium

Answer

Chemical Balance

Answer

Chemical Constant

Question 12

Which of the following models best demonstrates a balanced chemical equation?

Accepted Answer

F

Answer

G

Answer

H

Answer

J

Question 13

How many atoms in all are in a molecule of serotonin?

Accepted Answer

25

Answer

18

Answer

30

Answer

22

Question 14

The substance being dissolved is called the

Accepted Answer

Solute

Answer

Solvent

Question 15

What is a solvent?

Accepted Answer

The substance that does the dissolving in a solution.

Answer

The substance that is being dissolved in a solution.

Question 16

When a Kool Aid mix in water is dark in color and very sweet it is a solution.

Accepted Answer

Concentrated

Answer

Diluted

Question 17

When Kool Aid mix is light colored and tastes watery it is a solution.

Accepted Answer

Diluted

Answer

Saturated

Question 18

A sour taste is a characteristic of:

Accepted Answer

Acids

Answer

Bases

Question 19

Which is a characteristic of a base?

Accepted Answer

feels slippery

Answer

tastes sour

Question 20

A pH level of 7 indicates

Accepted Answer

Neutral

Answer

Acid

Answer

Base

Question 21

The pH scale is a range from:

Accepted Answer

0 to 14

Answer

1 to 10

Answer

5 to 20

Answer

-5 to 5

Question 22

A(n) is a substance with a pH less than 7

Accepted Answer

Acid

Answer

Base

Question 23

Which of the following is an acid?

Accepted Answer

orange juice

Answer

pure water

Answer

Soap

Answer

baking soda

Question 24

Ammonia has a pH of 11. Ammonia is

Accepted Answer

A base

Answer

An acid

Question 25

The amount of solute actually dissolved in a specified amount of solvent.

Accepted Answer

Concentration

Answer

supersaturated mixture

Answer

saturated solution

Question 26

You can make a solution more concentrated by adding .

Accepted Answer

solute

Answer

Water

Answer

Solvent

Question 27

In chemistry, a mole is

Accepted Answer

6.02 x 10²³ particles of a substance

Answer

a tiny rodent that lives underground

Answer

a skin growth

Question 28

Which will dissolve more quickly when making sweet tea?

Accepted Answer

a spoonful of sugar

Answer

a sugar cube

Question 29

What are the reactants (what's needed) for photosynthesis?

Accepted Answer

light, water, and carbon dioxide

Answer

glucose and oxygen

Question 30

What gas is released by plants during photosynthesis?

Accepted Answer

Oxygen

Answer

carbon dioxide

Answer

Hydrogen

Question 31

What pigment absorbs sunlight for photosynthesis?

Accepted Answer

chlorophyll

Answer

Thylakoid

Answer

Grana

Question 32

What are the products of photosynthesis?

Accepted Answer

oxygen and glucose

Answer

oxygen and carbon dioxide

Answer

water and carbon dioxide

Question 33

Long molecule chains consist of combined smaller molecules is called

Accepted Answer

polymer

Answer

Monomer

Answer

Transformer

Question 34

Polymers that are produced naturally by living things such as plants and animals are called

Accepted Answer

natural polymer

Answer

synthetic polymer

Question 35

Polymers made by humans through chemical reactions are called

Accepted Answer

synthetic polymer

Answer

natural polymer

Question 36

What's the name of the polymer that makes you, you?

Accepted Answer

DNA

Answer

Nylon

Answer

PVC

Question 37

True or False. All living things are made of carbon.

Accepted Answer

True

Answer

False

Question 38

Carbon has three fundamental structures: straight chains, branched chains, and

Accepted Answer

Rings

Answer

Trees

Answer

Abundant

Question 39

What is the hardest substance on Earth?

Accepted Answer

Diamonds

Answer

Fullerenes

Answer

Graphite

Question 40

Formed by plants and animals that lived in Earth's oceans and swamps millions of years ago.

Accepted Answer

fossil fuels

Answer

Dinosaurs

Answer

megalodons

Question 41

Which of the following is NOT a form of fossil fuel?

Accepted Answer

Spaghetti

Answer

Coal

Answer

Natural Gas

Answer

Petroleum

Question 42

The least penetrating form of radiation is _____

Accepted Answer

Alpha

Answer

Beta

Answer

Gamma

Question 43

Takes two small nuclei and combines them into a larger nucleus

Accepted Answer

Fusion

Answer

Fission

Question 44

Where does fusion occur naturally?

Accepted Answer

The Sun

Answer

Earth

Answer

Moon

Question 45

Most often transmutations will not occur unless the bombarding particles are moving at

Accepted Answer

Fast speeds

Answer

Slow speeds

Question 46

In the current model of the atom, protons and neutrons are made up of even smaller particles called .

Accepted Answer

Quarks

Answer

Quecks

Question 47

The splitting of a nucleus into smaller nuclei is

Accepted Answer

Fission

Answer

Fusion

Question 48

How do nuclear power-plants work?

Accepted Answer

Fission

Answer

Fusion

Question 49

What is a beneficial aspect of nuclear fission?

Accepted Answer

The ability to release tremendous amounts of energy

Answer

The ability to absorb energy

Question 50

What makes something radioactive?

Accepted Answer

an unstable nucleus

Answer

It decays over time

Answer

contaminated sewage

Question 51

The most penetrating form of radiation is

Accepted Answer

Gamma

Answer

Alpha

Answer

Beta

Question 52

Motion is described with respect to a

Accepted Answer

Frame of reference

Answer

Graph

Answer

Slope

Answer

Displacement

Question 53

Displacement is distance combined with

Accepted Answer

Direction

Answer

Velocity

Answer

Speed

Answer

Magnitude

Question 54

Displacement vectors of 3 m and 5 m in the same direction combine to make a displacement vector that is

Accepted Answer

8 m

Answer

2 m

Answer

0 m

Answer

15 m

Question 55

Average speed is the total distance divided by the

Accepted Answer

Total time

Answer

Average distance

Answer

Average acceleration

Answer

Slope

Question 56

You push on a box and are unable to move it. What force opposes your push?

Accepted Answer

Static friction

Answer

Rolling friction

Answer

Sliding friction

Question 57

For every action force there is a

Accepted Answer

Reaction force

Answer

Friction force

Answer

Net force

Question 58

Momentum depends upon

Accepted Answer

Mass and velocity

Answer

Weight and mass

Answer

Velocity and friction

Question 59

What force holds the nucleus together?

Accepted Answer

Nuclear

Answer

Magnetic

Answer

Gravitational

Question 60

Which of the following has the greatest momentum?

Accepted Answer

A car traveling on a highway

Answer

A huge boulder at rest

Answer

A small pebble that is tossed into the air

Answer

A baseball after it is hit with a bat

Answer

A small pebble at rest

Question 61

What is the net force and direction of motion?

Accepted Answer

20 N Right

Answer

40 N Right

Answer

40 N Left

Answer

20 N Left

Question 62

Why don't you feel the pressure exerted by the atmosphere?

Accepted Answer

pressure inside your body balances out the outside pressure

Answer

your body is immune to pressures

Question 63

What determines if an object will float or sink in a fluid?

Accepted Answer

If an object is more dense than the fluid it will sink, if it is less dense than the fluid it will float.

Answer

If an object is less dense than the fluid it will sink, if it is more dense than the fluid it will float.

Question 64

Which end of the pencil would more easily poke through a piece of paper?

Accepted Answer

Sharpened pencil point

Answer

Unsharpened pencil

Answer

Pencil eraser

Physical Science: Second Semester Test

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