Quiz about 8th Grade - NSCAS Review - Parts I & II

Question 1

During their experiment, Ty and Joe had observed that the plant had grown 3 cm. This is an example of

Accepted Answer

quantitative data

Answer

qualitative data

Answer

a conclusion

Answer

an inference

Question 2

After completing the experiment with multiple trials, Lauren and Maddie decided that sand would provide better drainage for plants than clay. Their decision is an example of

Accepted Answer

a conclusion

Answer

an inference

Answer

a theory

Answer

a hypothesis

Question 3

Ben and Melissa are completing a experiment in which they are trying to determine if the length of the chain on a swing set will affect the number of times a swing will move back and forth. Which of the following would help Ben and Melissa get more accurate results to their experiment?

Accepted Answer

repeated trials

Answer

using different kinds of chains

Answer

having more than 1 independent variable

Answer

having more than 1 dependent variable

Question 4

Which of the following is an example of an element?

Accepted Answer

oxygen

Answer

water

Answer

sodium chloride (NaCl)

Answer

hydrogen peroxide

Question 5

Joanna burned a piece of paper. This is an example of a(n)

Accepted Answer

chemical change

Answer

physical property

Answer

physical change

Answer

chemical property

Question 6

Tess placed salt in water and stirred it. Tess could no longer see the salt, What happened to it?

Accepted Answer

it dissolved

Answer

sublimation

Answer

it evaporated

Answer

a chemical change

Question 7

Mariah wants to measure the volume of a solution. Which tool would she use?

Accepted Answer

a graduated cylinder

Answer

a beaker

Answer

a spring scale

Answer

an Erlenmeyer flask

Question 8

Tommy believes that water will take longer to heat than soil. He based his assumption on a lesson he learned earlier in science class. This is an example of a(n)

Group of answer choices

Accepted Answer

an inference

Answer

a law

Answer

a theory

Answer

a repeated trial

Question 9

HCl (Hydrogen Chloride) would be an example of which of the following?

Accepted Answer

a compound

Answer

an element

Answer

an isotope

Answer

an atom

Question 10

The sun changing a liquid to a gas on a body of water is an example of

Accepted Answer

evaporation

Answer

condensation

Answer

vaporization

Answer

sublimation

Question 11

Mario observed that mold changed from a green to an orange color. This is an example of a(n)

Accepted Answer

a qualitative observation

Answer

quantitative observation

Answer

a hypothesis

Answer

both an quantitative and qualitative observation

Question 12

The life science class wanted to determine if the type of batteries used in a flashlight had the same longevity. They decided to use 4 different types of batteries - Duracell, Energizer, Rayovac, and a store brand name battery. They put the batteries in four flashlights and measured the length of time the battery lasted. The same type of flashlight was used, the temperature of the room was the same, and the flashlights were all turned on in the same location. These are examples of what?

Accepted Answer

controlled variables

Answer

manipulated variables

Answer

independent variables

Answer

dependent variables

Question 13

The life science class wanted to determine if the type of batteries used in a flashlight had the same longevity. They decided to use 4 different types of batteries - Duracell, Energizer, Rayovac, and a store brand name battery. They put the batteries in four flashlights and measured the length of time the battery lasted. The same type of flashlight was used, the temperature of the room was the same, and the flashlights were all turned on in the same location. These are examples of what?

Accepted Answer

controlled variables

Answer

manipulated variables

Answer

independent variables

Answer

dependent variables

Question 14

When dry ice is exposed to air, it instantly turns from a solid to a gas without going through the liquid phase first. This is an example of

Accepted Answer

sublimation

Answer

condensation

Answer

vaporization

Answer

evaporation

Question 15

The life science class wanted to determine if the type of batteries used in a flashlight had the same longevity. They decided to use 4 different types of batteries - Duracell, Energizer, Rayovac, and a store brand name battery. They put the batteries in four flashlights and measured the length of time the battery lasted. The length of time the batteries lasted is the ______.

Accepted Answer

dependent variable

Answer

controlled variable

Answer

manipulated variable

Answer

independent variable

Question 16

Olivia boiled water, it changes from a liquid to a gas. Which of the following statements is true about what happened to the water?

Accepted Answer

it went through a phase change, which is a physical change because it is still water

Answer

it went through sublimation because it changed directly from a solid to a gas

Answer

the mass of the water decreased as it went from a liquid to a gas

Answer

it went through a chemical change because it changed from water to water vapor

Question 17

The life science class wanted to determine if the type of batteries used in a flashlight had the same longevity. They decided to use 4 different types of batteries - Duracell, Energizer, Rayovac, and a store brand name battery. They put the batteries in four flashlights and measured the length of time the battery lasted. The type of battery used in this experiment is

Accepted Answer

the independent variable

Answer

the scientific question

Answer

the controlled variable

Answer

the dependent variable

Question 18

Jill wants to find out the atomic mass of the element iron. Which tool would help her?

Accepted Answer

the periodic table of elements

Answer

a spring scale

Answer

a graduated cylinder

Answer

a ruler

Question 19

When iron rusts and changes to iron oxide, which is true about the total number of oxygen and iron atoms before and after the change?

Accepted Answer

the total number of oxygen atoms and the total number of iron atoms remains the same

Answer

the total number of oxygen atoms increases but the total number of iron atoms decreases

Answer

there is an increase in both the number of oxygen and iron atoms

Answer

the total number of oxygen atoms decreases but the total number of iron atoms increases

Question 20

Which is an example of chemical property?

Accepted Answer

pH

Answer

density

Answer

color

Answer

mass

Question 21

Trenton was performing a science experiment in which he measured the distance from a particular place to the equator, then recorded the average daily temperature for a year. Because Tampa, Florida is closer to the equator that Bismark, North Dakota, Trenton _________________ that the average temperature would be greater in Tampa.

Accepted Answer

hypothesized

Answer

derived

Answer

concluded

Answer

theorized

Question 22

Using the diagram above, if we look at the number 3 in Lithium and the number 6.9, what can be infer?

Accepted Answer

there are approximately 4 neutrons in lithium

Answer

there are 3 electrons in lithium

Answer

there are 3 protons in lithium

Answer

all the options listed

Question 23

The difference between hydrogen and helium is that

Accepted Answer

Helium has one more proton than hydrogen

Answer

Hydrogen has one more electron than helium

Answer

There is no difference between hydrogen and helium

Answer

Hydrogen has one more proton than helium

Question 24

Using the diagram above, the number 1 above the H in hydrogen can tell us what information?

Accepted Answer

H has 1 proton

Answer

H has 1 neutron

Answer

H has 1 proton and 1 neutron

Answer

H has a mass number of 1

Question 25

Scientists tend to publish their work so that other scientists may analyze the strengths and weaknesses of the work. This is an example of a(n)

Accepted Answer

scientific critique

Answer

drawing conclusions

Answer

repeated trials

Answer

making inferences

Question 26

Elizabeth brings out a ice cold glass of iced tea to enjoy on her front porch during the summertime. She notices beads of water dripping from the outside of her glass. Which BEST explains this phenomenon?

Accepted Answer

the water vapor in the air condenses causing the beads of water on the outside of the glass

Answer

the water from inside the glass spilled to the outside of the glass causing the water droplets to form

Answer

the water vapor in the air evaporated causing the water droplets on the outside of the glass

Answer

the water inside the tea evaporated causing the water droplets to appear on the outside of the glass

Question 27

Based on the periodic table above, Hydrogen, Lithium, Sodium, and Potassium belong to the same

Accepted Answer

family or group

Answer

period

Answer

element

Answer

isotope

Question 28

Potassium, magnesium, an aluminum are all ______.

Accepted Answer

metals

Answer

nonmetals

Answer

noble gases

Answer

halogens

Question 29

Mass cannot be created nor destroyed. This is an example of a(n)

Accepted Answer

scientific law

Answer

theory

Answer

inference

Answer

hypothesis

Question 30

Which of the following are examples of vaporization?

Accepted Answer

the water in the mud puddle evaporated

Answer

in subfreezing air, water vapor turns directly into ice

Answer

the glass of ice tea was taken outside on a humid day and beads of water formed on the glass

Answer

the dry ice formed steam

Question 31

Using the diagram above, you know that Mercury has ____________ protons.

Accepted Answer

80

Answer

200

Answer

120

Answer

50

Question 32

The table below shows different sets of elements. Based on what you know about the periodic table of elements, which grouping would most likely react similarly?

Group 1Beryllium (Be), Hydrogen (H), Iron (Fe), and Cobolt (Co)Group 2Sodium (Na), Magnesium (Mg), Nickel (Ni), and Hydrogen (H)Group 3Hydrogen (H), Lithium (Li), Sodium (Na), and Potassium (K)Group 4Oxygen (O), Chlorine (Cl), Neon (Ne), and Titanium (Ti)

Accepted Answer

Group 3

Answer

Group 1

Answer

Group 2

Answer

Group 4

Question 33

Snow forming directly in the clouds water vapor without becoming a liquid first is an example of

Accepted Answer

deposition

Answer

evaporation

Answer

condensation

Answer

sublimation

Question 34

Using the diagram above, H is the __________ for hydrogen

Accepted Answer

atomic symbol

Answer

atomic number

Answer

atomic mass

Answer

number of protons

8th Grade - NSCAS Review - Parts I & II

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