Question 1

What does it mean if your hypothesis does not match your results? If a scientific investigation results in an unexpected conclusion, was it a waste of time? Why or Why not?

Accepted Answer

It means that your prediction was not supported or proven by the results. This is not a waste of time. This can lead scientists to develop a new hypothesis to test in additional experiments, leading to new discoveries.

Answer

It means that you should change your prediction to match the results

Answer

It doesn't mean anything

Answer

It means that you did the experiment incorrectly

Question 2

Elements in the same _____ (vertical column) have similar properties.

Accepted Answer

group

Answer

row

Answer

period

Answer

level

Question 3

What would be the atomic number of Hydrogen-3?

Accepted Answer

Hydrogen's atomic number is 1

Answer

Hydrogen's atomic number is 2

Answer

Hydrogen's atomic number is 3

Answer

Hydrogen's atomic number is 0

Question 4

A rocket is shown above. Which of Newton's laws explains how the rocket moves when launched?

Accepted Answer

Newton's 3rd law states that for every action there is an equal and opposite reaction. The gas and flame pushing down and away from the rocket propels the rocket up.

Answer

Newton's 2nd Law states that force = mass x acceleration

Answer

None of Newton's laws explain how the rocket moves

Answer

Newton's 1st law states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Question 5

What force are you trying to use with your new basketball shoes?

Accepted Answer

Friction

Answer

Air resistance

Answer

Gravity

Answer

Balanced forces

Question 6

At which point(s) on the diagram above will the roller coaster have the least kinetic energy?

Accepted Answer

Position A & C

Answer

Position A & D

Answer

Position B & C

Answer

Position B & D

Question 7

What is car C's average speed?

Accepted Answer

.8 m/sec

Answer

.8 km/sec

Answer

1.33 m/sec

Answer

1.25 m/sec

Question 8

If 2 vehicles are moving with a force of 100 N, which vehicle would have the most acceleration, the car or the 18-wheeler? Why?

Accepted Answer

The car, because it has less mass.

Answer

The 18-wheeler, because it has more mass.

Answer

The car, because it has more force.

Answer

The 18-wheeler, because it has more force.

Question 9

A swimmer swims the 400 m freestyle in 2.5 minutes with a force of 50 Newtons. How much work did he do?

Accepted Answer

W=FxD W= 50N x 400m W= 2000 Joules

Answer

W=D/F W= 400m / 50N W= 8 Joules

Answer

W = D/T W= 400m / 2.5 mins = 160 Newtons

Answer

W=FxD W= 50N x 400m W= 2000 Newtons

Question 10

What is plate tectonics?

Accepted Answer

States that Earth's surface is made up of giant, moving slabs called tectonic plates

Answer

States that all land forms are the result of plate movement

Answer

States that sea floor spreading is causing the Earth to get larger

Answer

States that the Earth's crust is all one large piece

Question 11

How many atoms of each element in 2HC₂H₃O₂?

Accepted Answer

H - 8, C - 4, O - 4

Answer

H - 6, C - 4, O - 4

Answer

H - 5, C - 2, O - 2

Answer

H - 2, C - 6, O - 4

Question 12

Why is hydrogen in group one and why is it like the halogens?

Accepted Answer

Hydrogen has only 1 valence electron like group 1. Hydrogen is like the halogens because it only needs one additional electron to complete its outer level

Answer

Hydrogen is not in group one and is not like the halogens!

Answer

Halogen is a nonmetal

Answer

Hydrogen has a complete set of valence electrons and is not reactive

Question 13

What forces caused the free thrown ball to slow down and fall short of making a basket?

Accepted Answer

Gravity and air resistance

Answer

Balanced Forces

Answer

Applied Force

Answer

Friction

Question 14

Using the chart above, if an unknown substance has a mass of 79.9g and a volume of 25.7 cm3, what is the unknown substance?

Accepted Answer

Bromine

Answer

Potassium

Answer

Krypton

Answer

Sulfur

Question 15

What did sea-floor spreading provide explanation for?

Accepted Answer

Provided explanation for continental drift

Answer

The formation of folded and volcanic mountains

Answer

The location of the Ring of Fire

Answer

Provided explanation for why earthquakes occur

Question 16

Why was Alfred Wegener's Theory of Continental Drift not accepted by the scientific community?

Accepted Answer

He could not give explanation as to why the continents moved, only that he thought they had

Answer

People thought he was crazy

Answer

He could not prove how old Pangaea is

Answer

There were too many tectonic plates

Question 17

How many valence electrons do atoms in groups 1, 2, 13, 14, 15, 16, 17, and 18 have?

Accepted Answer

Groups 1 & 2 - the # of valence electrons is the same as the group number; Groups 13-18 - the # of valence electrons is the group number minus 10.

Answer

All groups have the same number of valence electrons

Answer

They have the same number of valence electrons as their period number

Answer

Groups 1, 2, 13, 14, 15, 16, 17, 18 - the # of valence electrons is the same as the group number

Question 18

A fluorine atom has 9 protons, 10 neutrons, and 9 electrons. An isotope of fluorine would have a different number of __________.

Accepted Answer

neutrons

Answer

electrons

Answer

protons

Answer

energy levels

Question 19

What is the difference between an atom and an element?

Accepted Answer

An atom is the smallest particle into which an element can be divided and still be the same substance; the smallest unit of an element that has all the properties of that elements.

Answer

an atom has a different number of protons and neutrons than an element

Answer

atoms and elements have different properties

Answer

An element is the smallest particle into which an atom can be divided and still be the same substance

Question 20

When a transfer of electrons takes place between a metal and a nonmetal, the metal and nonmetal become _____ because they have gained or lost electrons.

Accepted Answer

ions

Answer

valence electrons

Answer

isotopes

Answer

neutral

Question 21

At which point(s) on the diagram above will the roller coaster have the most potential energy?

Accepted Answer

Position A

Answer

Position C

Answer

Position D

Answer

Position B

Question 22

At which point(s) on the diagram above will the roller coaster have the most kinetic energy?

Accepted Answer

Position B

Answer

Position D

Answer

Position A

Answer

Position C

Question 23

What does slope represent?

Accepted Answer

Speed

Answer

time

Answer

distance

Answer

Acceleration

Question 24

In a laboratory investigation, what is a control group? An experimental group? How many testing variables (independent variables) should be included?

Accepted Answer

A control group does not receive the treatment and is the source of comparison. An experimental group receives the treatment (independent variable). There should only be one tested independent variable in an investigation.

Answer

A control group and an experimental group are the same thing!

Answer

A control group does not receive the treatment and is the source of comparison. An experimental group receives the treatment (independent variable). There can be several variables tested in an investigation.

Answer

An experimental group does not receive the treatment and is the source of comparison. A control group receives the treatment (independent variable). There should only be one tested independent variable in an investigation.

Question 25

Once a conclusion is reached in a scientific investigation, is that scientific area of study always complete? Why or why not?

Accepted Answer

No, the conclusion can be used to determine what do next

Answer

No, a scientific investigation is never complete

Answer

No, you should change your hypothesis to match your conclusion before the investigation is complete

Answer

Yes, the conclusion is the end of a scientific investigation

Question 26

When a person skydives from an airplane, they fall until the upward force of air resistance on their parachute becomes equal to the downward force of gravity. When these two forces become equal in magnitude, what happens to the skydivers speed?

Accepted Answer

It will stay constant

Answer

The skydiver will fall slower

Answer

The skydiver will fall faster

Answer

The force of gravity will decrease

Question 27

On what side of the arrow would you find the products?

Accepted Answer

right

Answer

center

Answer

left

Answer

all chemical substances are products

Question 28

What are inhibitors and catalysts?

Accepted Answer

Inhibitors - a substance that slows down or stops a chemical reaction; Catalysts - a substance that speeds up the rate of a chemical reaction.

Answer

Inhibitors - a substance that speeds up the rate of a chemical reaction Catalysts - a substance that slows down or stops a chemical reaction.

Answer

Substances that do not affect a chemical reaction

Answer

Inhibitors - a substance that causes the reaction to give off heat, Catalysts - a substance that cause the reaction to absorb heat

Question 29

What are the 5 signs that a chemical reaction is taking place?

Accepted Answer

color change, odor change, precipitate formation, gas formation, energy change

Answer

change in shape, size, amount, color, smell

Answer

touch, taste, smell, sight, hearing

Answer

change in valence electrons, protons, neutrons, charge, energy levels

Question 30

What type of compound forms between two nonmetals?

Accepted Answer

covalent

Answer

complex

Answer

ionic

Answer

organic

Question 31

What group of elements are the most reactive? Least reactive? (think valence electrons)

Accepted Answer

Most - group 1 Alkali metals are the most reactive because they only have one valence electron and it is easily taken. Least - Noble gases are the least reactive because they have a full outer energy level and need no more electrons to be stable.

Answer

You cannot determine how elements will react, you just have to try an experiment and see what will happen

Answer

All groups have the same reactivity

Answer

Most - group 13 is the most reactive because they only have 3 valence electron and it is easily taken. Least - Halogen gases are the least reactive because they have a full outer energy level and need no more electrons to be stable.

Question 32

What do you need in order to develop a hypothesis?

Accepted Answer

A hypothesis can be developed after making observations or based on previous experiments.

Answer

A hypothesis can be developed based on option

Answer

A hypothesis should be based on the steps in the experiment

Answer

A hypothesis can only be developed after an experiment has been conducted

Question 33

Identify the independent and dependent variable in the investigation above. How do you know which is which?

Accepted Answer

The independent variable is the mass of the pendulum and the dependent variable is the completion time for 20 swings.

Answer

The independent variable is the mass of the pendulum and the dependent variable is the distance the string is pulled back..

Answer

The independent variable is the length of the string and the dependent variable is the completion time for 20 swings.

Answer

The independent variable is the distance the string is pulled back and the dependent variable is the completion time for 20 swings.

Question 34

How does a river over time weather the land, and what feature will this eventually form?

Accepted Answer

The river will erode away the land and eventually form a canyon

Answer

The river banks will be built up and will eventually cut off part of the river, creating a lake

Answer

The river will erode away the land and eventually form a mountain range

Answer

The river will become smaller and less steep over time, eventually creating a flat plain

Question 35

What is erosion and give an example of a formation formed by erosion found in the US

Accepted Answer

Erosion transports rock, sediment, and soil from one place to another: The Great Lakes (glacier), Grand Canyon (water)

Answer

Erosion deposits rock, sediment, and soil from one place to another: The Great Lakes (glacier), Grand Canyon (water)

Answer

Erosion leaves rock and sediment in a new location: The Florida peninsula, The Rocky Mountains

Answer

Erosion wears away rock and sediment: the Great Plains, Mississippi River Valley

Question 36

What are the 3 pieces of evidence that support the theory of plate tectonics?

Accepted Answer

similar fossil evidence, shapes of continents, location of earthquakes and volcanoes (Sea-floor spreading, magnetic reversals, also support the theory)

Answer

similar plate size, the location of plates, magnetic reversals

Answer

Convergent, divergent, and transform boundaries

Answer

Leaves changing colors, striking a match, using a battery

Question 37

What side of the periodic table easily gains electrons? Lose electrons?

Accepted Answer

Groups 1 and 2 lose electrons and groups 15, 16, and 17 gain electrons.

Answer

Groups 1 and 2 gain electrons and groups 15, 16, and 17 lose electrons.

Answer

Periods 1 and 2 lose electrons and periods 15, 16, and 17 gain electrons.

Answer

All elements gain and lose electrons

Related quizzes

Related quizzes