Quiz about 8th Science Review #2

Question 1

What are valence electrons?

Accepted Answer

electrons located on the outer energy level

Answer

Any of an atom's electrons

Answer

Electrons located on the first energy level

Answer

Electrons not attached to any atom

Question 2

What period is Lead (Pb) in?

Accepted Answer

6

Answer

4

Answer

Metals

Answer

4A

Question 3

What group or family is lead in?

Accepted Answer

4A

Answer

6

Answer

4

Answer

Metal

Question 4

How many electrons does a Strontium (Sr) ION have?

Accepted Answer

36

Answer

38

Answer

10

Answer

8

Question 5

How many neutrons does Bromine (Br) have?

Accepted Answer

45

Answer

35

Answer

80

Answer

7

Question 6

What period contains the element Plutonium (Pu)?

Accepted Answer

7

Answer

8

Answer

6

Answer

Plutonium doesn't exist

Question 7

what is the biggest group on the table

Accepted Answer

metals

Answer

nonmetals

Answer

metaloids

Answer

halogens

Question 8

Which is a producer?

Accepted Answer

tall grass

Answer

deer

Answer

lion

Answer

worm

Question 9

What does a food web represent?

Accepted Answer

All connections of energy flow throughout all organisms in a ecosystem.

Answer

The specific ways that mutualism is carried out.

Answer

A single pathway or energy flow between organisms.

Answer

How carnivores get their food.

Question 10

The diagram shows an example of what kind of organism

Accepted Answer

Autotroph

Answer

Heterotroph

Answer

Decomposer

Answer

Herbivore

Question 11

The diagram shows an example of what kind of organism

Accepted Answer

Decomposer

Answer

Autotroph

Answer

Heterotroph

Answer

Herbivore

Question 12

The animals in this image are examples of _________________________ .

Accepted Answer

Heterotrophs

Answer

Autotrophs

Answer

Herbivores

Answer

Producers

Question 13

These mushroom are heterotrophs and must therefore get nutrients from other organic matter. Mushroom aslo act as ____________________ in many food webs.

Accepted Answer

Decomposer

Answer

Herbivore

Answer

Carnivore

Answer

Omnivore

Question 14

In this image, the grass is the ______________.

Accepted Answer

Producer

Answer

Primary Consumer

Answer

Secondary Consumer

Answer

Heterotroph

Question 15

Which of the animals in this food web is a secondary consumer?

Accepted Answer

Lizard

Answer

Hawk

Answer

Mouse

Answer

Snake

Question 16

The largest part of an ecosystem is always the ________________.

Accepted Answer

Primary Producers

Answer

Primary Consumers

Answer

Quarternary Consumers

Answer

Secondary Consumers

Question 17

An environmental change that removed which of these organisms from the ecosystem would cause the most instability in the ecosystem?

Accepted Answer

Zooplankton

Answer

Auklets

Answer

Foxes

Answer

Salmon

Question 18

At which point is potential energy greatest?

Accepted Answer

W

Answer

X

Answer

Y

Answer

Z

Question 19

The faster an object moves, the ________ kinetic energy it has.

Accepted Answer

more

Answer

less

Answer

none of the above

Answer

same

Question 20

Which is the best example that something has kinetic energy?

Accepted Answer

b. a tennis ball rolling across the court

Answer

a. a car parked on a steep hill

Answer

c. a picture hanging on the wall

Answer

d. a piece of coal before it's burned

Question 21

Gravitational potential energy depends on the ________ and ________ of the object.

Accepted Answer

Height and mass

Answer

Friction and movement

Answer

Mass and Movement

Answer

Height and Friction

Question 22

When a pendulum swings, at which point is kinetic energy highest?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 23

Conservation of energy states that energy cannot be ________ or ________, but can be altered from one form to another.

Accepted Answer

created, destroyed

Answer

gravity, force

Answer

heat, created

Question 24

How many atoms of carbon (C) are in C₆H₁₂O₆?

Accepted Answer

6

Answer

3

Answer

12

Answer

24

Question 25

Which of the following is a compound?

Accepted Answer

CO2

Answer

Co

Answer

O2

Answer

C

Question 26

Which is the correct formula for:
three hydrogen (H)
one sulfur (S)
four oxygen (O)

Accepted Answer

H3SO4

Answer

HSO4

Answer

H4S3O

Answer

H2O

Question 27

The blue numbers in the image below represent ________

Accepted Answer

subscripts

Answer

I don't know, and don't want to try

Answer

coefficients

Answer

none of the answers are correct

Question 28

The atoms along the staircase are called

Accepted Answer

metalloids

Answer

metals

Answer

nonmetals

Answer

noble gases

Question 29

An atom has 5 protons and 7 neutrons. What is the mass number of the atom?

Accepted Answer

12

Answer

5

Answer

7

Answer

2

Question 30

This particle determines what element you have - the elements identity.

Accepted Answer

proton

Answer

electron

Answer

neutron

Answer

valence shell

Question 31

Describe an Electron Cloud?

Accepted Answer

where electrons are located

Answer

the mist outside of an atom

Answer

home of the protons

Answer

nucleus

Question 32

What are the maximum number of electrons that go on the first 3 energy levels?

Accepted Answer

2,8,18

Answer

2,4,16

Answer

4,8,12

Answer

3,4,6

Question 33

Which particles make up the nucleus of an atom?

Accepted Answer

protons and neutrons

Answer

electrons and protons

Answer

electrons, protons, and neutrons

Answer

electrons and neutrons

Question 34

What is the mass number and name of an element with 8 protons and 8 neutrons?

Accepted Answer

16 - Oxygen

Answer

16 - Carbon

Answer

24 - Oxygen

Answer

8 - Neon

Question 35

What is the atomic mass of the atom pictured?

Accepted Answer

23

Answer

11

Answer

12

Answer

22

Question 36

What is the number of protons that the element in this image contain?

Accepted Answer

7

Answer

14

Answer

15

Answer

18

Question 37

What does the nucleus of an atom contain?

Accepted Answer

Protons and neutrons

Answer

Electrons and neutrons

Answer

Neutrinos and positrons

Answer

Electrons and megatrons

Question 38

What is the area in the atom around the nucleus called?

Accepted Answer

electron cloud

Answer

cytoplasm

Answer

subatomic cloud

Answer

cumulonimbus cloud

Question 39

A proton has approximately the same mass as a(n) _______________.

Accepted Answer

neutron

Answer

straight pin

Answer

quark

Answer

electron

Question 40

A scientist combines chemicals and produces an exothermic reaction. What byproduct of this reaction would show that it is exothermic?

Accepted Answer

heat

Answer

coolness

Answer

a precipitate

Answer

gas bubbles

Question 41

Which of the following is a chemical change?

Accepted Answer

gasoline burns in a car engine

Answer

water freezes to form ice

Answer

sugar dissolves in water

Answer

a piece of metal expands when it is heated

Question 42

A change in the shape of an object is an example of _________________.

Accepted Answer

a physical change

Answer

a chemical change

Answer

energy

Answer

an endothermic change

Question 43

What type of change occurs when a new substance is formed that has different properties from the original substances?

Accepted Answer

chemical change

Answer

nuclear change

Answer

physical change

Answer

mutation

Question 44

Which is an example of a physical change?

Accepted Answer

using sand and water to build a sand castle on a beach

Answer

sodium and chlorine form salt

Answer

a copper ring turns white and green

Answer

a log burns in a fire

Question 45

If you combine two substances in a beaker at room temperature and the beaker feels cold to the touch, it means that the substances:

Accepted Answer

have undergone an endothermic reaction

Answer

have not reacted with each other

Answer

have undergone a physical change

Answer

have undergone an exothermic reaction

Question 46

Which of the following is an example of a physical change?

Accepted Answer

ice melting

Answer

wood burning

Answer

food digesting

Answer

iron rusting

Question 47

Your mother used pancake mix, eggs, and milk to make pancakes.  Which of these is the product?

Accepted Answer

the pancakes

Answer

the pancake mix

Answer

the eggs

Answer

the milk

Question 48

What step in the water cycle occurs when a water turns into water vapor?

Accepted Answer

evaporation

Answer

condensation

Answer

precipitation

Question 49

What tool do scientists use to study wind speeds inside a thunderstorm to learn about a tornado?

Accepted Answer

Doppler Radar

Answer

Fujita Scale

Answer

Space Satellites

Question 50

Igneous Rock forms ...

Accepted Answer

by magma.

Answer

by heat and pressure warping a rock.

Answer

by earthquakes.

Question 51

The cause of a rock breaking due to frozen water is an example of...

Accepted Answer

weathering.

Answer

soil formation.

Answer

erosion.

Question 52

A plate moving along a fault often causes...

Accepted Answer

an earthquake.

Answer

a tornado.

Answer

a hurricane.

Question 53

Choose the correct definition and example of a fossil fuel.

Accepted Answer

items made from organisms that lived long ago. Ex. coal

Answer

a rock rich in minerals that can be removed from Earth. Ex. metal

Answer

cell that changes energy from the Sun into electrical energy. Ex. solar panels

Question 54

Contamination of the ocean or land is...

Accepted Answer

the greatest risk of from using an oil drill.

Answer

caused by sediment.

Answer

a nonrenewable energy source.

8th Science Review #2

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