Quiz about 8th Grade Science

Question 1

What happens to an iron nail when it rusts?

Accepted Answer

Iron reacts with oxygen in the air, creating iron oxide on the surface of the nail

Answer

Oxygen in the air dissolves part of the iron

Answer

The nail becomes lighter because the rust heats the iron

Answer

The nail becomes heavier because rust weighs more than iron

Question 2

Which formula listed below correctly finds density?

Accepted Answer

D=m/v

Answer

D=v/m

Answer

D=g/v3

Answer

D=g/v

Question 3

Mass is conserved in both physical and chemical changes.

Accepted Answer

True

Answer

False

Question 4

Change of state is a physical change.

Accepted Answer

True

Answer

False

Question 5

Adding an electron to an atom results in an isotope.

Accepted Answer

False

Answer

True

Question 6

The atomic number is the number of protons in an atom of an element.

Accepted Answer

True

Answer

False

Question 7

The positively charged center of the atom is called the _______

Accepted Answer

nucleus

Answer

electron cloud

Answer

neutron

Answer

compound

Question 8

The negative particle in an atom is the ____________________

Accepted Answer

electron

Answer

ion

Answer

nucleus

Answer

neutron

Question 9

Which particles make up the nucleus?

Accepted Answer

neutron and proton

Answer

electron and proton

Answer

proton and positron

Answer

electron and neutron

Question 10

The freezing of water is a chemical change.

Accepted Answer

False

Answer

True

Question 11

Flammability is a ________ property.

Accepted Answer

chemical

Answer

physical

Answer

private

Answer

illegal

Question 12

Mass is the amount of matter in an object. _______ is the gravitational pull on the mass of the object.

Accepted Answer

weight

Answer

density

Answer

volume

Answer

magnetism

Question 13

A spring scale is used to measure which physical property.

Accepted Answer

weight

Answer

mass

Answer

density

Answer

volume

Question 14

A graduated cylinder is used to measure which physical property?

Accepted Answer

volume

Answer

mass

Answer

weight

Answer

speed

Question 15

A digital scale is used to measure which physical property?

Accepted Answer

weight

Answer

speed

Answer

volume

Answer

mass

Question 16

a triple beam balance is used to measure which physical property?

Accepted Answer

mass

Answer

volume

Answer

weight

Answer

length

Question 17

Which physical property explains why copper is often used in electric wiring?

Accepted Answer

conductivity

Answer

density

Answer

mass

Answer

reactivity

Question 18

If the formula for density is mass/volume then what is the density of an element that has a mass of 8 g and volume of 2 ml?

Accepted Answer

4 g/cm3

Answer

3 g/cm3

Answer

40 g/cm3

Answer

30 g/cm3

Question 19

True or False: Mass and weight are the same thing.

Accepted Answer

False

Answer

True

Question 20

True or False: If you take an object from Earth and place it on the moon, its density will not change.

Accepted Answer

true

Answer

false

Question 21

True or False: If you take an object from Earth and place it on the moon, its mass will change.

Accepted Answer

False

Answer

True

Question 22

True or False: If you take an object from Earth and place it on the moon, its weight will change.

Accepted Answer

True

Answer

False

Question 23

Density is expressed as ____________

Accepted Answer

mass/volume

Answer

mass/weight

Answer

weight/volume

Answer

volume/mass

Question 24

Which are physical properties of matter?

Accepted Answer

all of these

Answer

mass

Answer

conductivity

Answer

volume

Answer

boiling/melting point

Question 25

The ability or inability of a substance to combine with or change into one or more new substances is called a ____________

Accepted Answer

chemical property of matter

Answer

physical property of matter

Answer

state of matter

Answer

it doesn't matter

Question 26

What is photosynthesis?

Accepted Answer

the process in which green plants use carbon dioxide to make oxygen

Answer

how fungi obtain energy

Answer

The process in which green plants use oxygen to make carbon dioxide

Answer

the process of absorbing energy by touching things

Question 27

Where does photosynthesis take place?

Accepted Answer

in the chloroplast of a plant cell

Answer

in the mitochondria of a plant cell

Answer

in the mitochondria of an animal cell

Answer

in the chloroplast of an animal cell

Question 28

What is the largest ecosystem on Earth?

Accepted Answer

ocean

Answer

savanah

Answer

desert

Answer

plain

Question 29

Which of the following is one of the biotic factors in a desert ecosystem as well a food protein source for humans?

Accepted Answer

scorpions

Answer

the Sun

Answer

water

Answer

sand

Question 30

Which of the following is an abiotic factor in a marine ecosystem?

Accepted Answer

water

Answer

grass

Answer

whale

Answer

plankton

Question 31

In a picture of a water cycle what part of the cycle do clouds represent?

Accepted Answer

condensation

Answer

evaporation

Answer

precipitation

Answer

runoff

Question 32

When an producer doesn't use the Sun in the production of its own food, it uses the process called ___________.

Accepted Answer

chemosynthesis

Answer

photosynthesis

Answer

cellular respiration

Answer

evaporation

Question 33

What might be an alternative food source for humans to get the (N) nitrogen that make the proteins required for life?

Accepted Answer

insects

Answer

water

Answer

sunlight

Answer

air

Question 34

Nitrogen is a essential part of ____.

Accepted Answer

proteins and DNA

Answer

carbonation

Answer

the water cycle

Answer

transpiration

Question 35

The atomic number of elements in the same period...

Accepted Answer

increase from left to right

Answer

increase from right to left

Answer

have the same number of protons

Answer

have the same number of electrons

Question 36

Elements in the same group have the same number of valence electrons and...

Accepted Answer

have similar properties

Answer

have the same number of energy levels

Answer

are metals

Answer

contain minerals

Question 37

What is the metalloid in group 13?

Accepted Answer

boron

Answer

sodium

Answer

scandium

Answer

aluminum

Question 38

When you have two letters in the element symbol, the second letter is always...

Accepted Answer

lowercase

Answer

uppercase

Question 39

What type of change occurs when the appearance changes, but the chemical composition stays the same?

Accepted Answer

physical change

Answer

chemical change

Question 40

The length of a day is determined by Earth's ______

Accepted Answer

rotation

Answer

revolution

Answer

temperature

Answer

orbit

Question 41

How would conditions on Earth change if Earth stopped rotating on its axis?

Accepted Answer

The side of Earth facing the Sun would heat up and be in total light all the time.

Answer

The side facing the Sun would get very cold and be in darkness.

Answer

All places on Earth would experience darkness for half of the year.

Answer

All places on Earth would experience light for half the year.

Question 42

How does the tilt of the Earth's axis affect how the Sun's rays strike the Earth?

Accepted Answer

The part tilted toward the Sun gets more direct rays and heats up more

Answer

The part tilted away from the Sun gets more direct rays and heats up more

Answer

The part tilted away from the Sun gets indirect rays and heats up more

Answer

The part tilted toward the Sun gets indirect rays and cools down more

Question 43

When it is Summer in the Northern Hemisphere, it is ______________ in the Southern Hemisphere.

Accepted Answer

Winter

Answer

Easter

Answer

Christmas

Answer

Spring

Question 44

Earth's temperature and hours of daylight stay most constant at the ________

Accepted Answer

Equator

Answer

North Pole

Answer

Antarctic

Answer

Bermuda Islands

Question 45

The Earth revolves around the Sun and the moon _________ around the Earth.

Accepted Answer

revolves

Answer

rotates

Answer

skips

Answer

bounces

Question 46

What affects the Earth's tides?

Accepted Answer

Sun and moon

Answer

Mars and Jupiter

Answer

Pluto and Neptune

Answer

Mercury and Saturn

Question 47

What are spring tides?

Accepted Answer

tides during new moon and full moon

Answer

tides in the Spring

Answer

tides that are warm

Answer

tides that cause flowers to bloom in the Spring

Question 48

What causes ocean tides?

Accepted Answer

the Sun and moon's gravity

Answer

the Sun and Earth's gravity

Answer

ocean currents

Answer

the revolution of the Earth around the Sun

Question 49

How often do tides change from high tide to low tide?

Accepted Answer

6 hours

Answer

16 hours

Answer

8 hours

Answer

24 hours

Question 50

Which phase of the moon results in the greatest difference between high and low tides?  This is also called the spring tide.

Accepted Answer

new moon

Answer

crescent moon

Answer

last quarter

Answer

first quarter

Question 51

Which of the following is the correct equation for PHOTOSYNTHESIS?

Accepted Answer

CO₂+ light + H₂O --> O₂+ Sugar

Answer

CO₂+ sugar + H₂O --> O₂+ light

Answer

_O2+ light + H₂O --> CO₂+ Sugar

Answer

CO₂+ O₂ + H₂O --> Light+ Sugar

Question 52

Which gas is removed from the atmosphere during photosynthesis?

Accepted Answer

carbon dioxide

Answer

hydrogen

Answer

oxygen

Answer

nitrogen

Question 53

What are the products of photosynthesis?

Accepted Answer

oxygen and glucose

Answer

water and carbon dioxide

Answer

oxygen and carbon dioxide

Answer

oxygen and water

Question 54

Chloroplasts are...

Accepted Answer

Specialized structures of plants where food is made

Answer

Structures of animal cells to produce ATP

Answer

Organelles where lipids are elaborated

Answer

Waste organelle of plants

Question 55

Name the moon phase

Accepted Answer

waxing gibbous

Answer

waning crescent

Answer

waxing crescent

Answer

waning gibbous

Question 56

Name the moon phase

Accepted Answer

waning crescent

Answer

waxing crescent

Answer

waning gibbous

Answer

waxing gibbous

Question 57

Name the moon phase

Accepted Answer

New Moon

Answer

First Quarter

Answer

Last Quarter

Answer

Full Moon

Question 58

Name the moon phase

Accepted Answer

Last Quarter or (third quarter)

Answer

First Quarter

Answer

New Moon

Answer

Full Moon

Question 59

Name the moon phase

Accepted Answer

First Quarter

Answer

Last Quarter

Answer

New Moon

Answer

Full Moon

Question 60

The cycle of the moon lasts about a _.

Accepted Answer

month

Answer

day

Answer

year

Answer

week

Question 61

The moon ____________ around the Earth.

Accepted Answer

orbits

Answer

rotates

Answer

up

Answer

down

Question 62

The Earth's _______ is an imaginary line that goes from the North Pole to the South Pole.

Accepted Answer

axis

Answer

vernal equinox

Answer

solar eclipse

Answer

solar flare

Question 63

Which planets are visible from Earth without using a telescope?

Accepted Answer

Venus, Mars and Jupiter

Answer

Saturn, Pluto and Kree

Question 64

Venus experiences an intense greenhouse effect.

Accepted Answer

True

Answer

False

8th Grade Science

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