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8th Grade - NSCAS Review - Parts I & II

Total questions: 35

Worksheet time: 18mins

Name
Class
Date
1.

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

a)

qualitative data

b)

quantitative data

c)

a conclusion

d)

an inference

2.

Amy’s bike had been left outside, and the frame began to rust. This is an example of

a)

a physical property

b)

a chemical property

c)

a physical change

d)

a chemical change

3.

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

a)

an inference

b)

a conclusion

c)

a theory

d)

a hypothesis

4.

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?

a)

using different kinds of chains

b)

having more than 1 independent variable

c)

repeated trials

d)

having more than 1 dependent variable

5.

Which of the following is an example of an element?

a)

water

b)

oxygen

c)

sodium chloride (NaCl)

d)

hydrogen peroxide

6.

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

a)

physical property

b)

physical change

c)

chemical property

d)

chemical change

7.

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

a)

sublimation

b)

it evaporated

c)

a chemical change

d)

it dissolved

8.

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

a)

a beaker

b)

a spring scale

c)

an Erlenmeyer flask

d)

a graduated cylinder

9.

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

a)

a law

b)

an inference

c)

a theory

d)

a repeated trial

10.

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

a)

a compound

b)

an element

c)

an isotope

d)

an atom

11.

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

a)

condensation

b)

evaporation

c)

vaporization

d)

sublimation

12.

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

a)

quantitative observation

b)

a hypothesis

c)

a qualitative observation

d)

both an quantitative and qualitative observation

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?

a)

controlled variables

b)

manipulated variables

c)

independent variables

d)

dependent variables

14.

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?

a)

controlled variables

b)

manipulated variables

c)

independent variables

d)

dependent variables

15.

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

a)

condensation

b)

vaporization

c)

sublimation

d)

evaporation

16.

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 ______.

a)

controlled variable

b)

manipulated variable

c)

independent variable

d)

dependent variable

17.

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

a)

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

b)

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

c)

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

d)

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

18.

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

a)

the scientific question

b)

the controlled variable

c)

the independent variable

d)

the dependent variable

19.

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

a)

a spring scale

b)

a graduated cylinder

c)

the periodic table of elements

d)

a ruler

20.

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?

a)

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

b)

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

c)

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

d)

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

21.

Which is an example of chemical property?

a)

pH

b)

density

c)

color

d)

mass

22.

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.

a)

derived

b)

concluded

c)

hypothesized

d)

theorized

23.

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

a)

there are approximately 4 neutrons in lithium

b)

there are 3 electrons in lithium

c)

there are 3 protons in lithium

d)

all the options listed

24.

The difference between hydrogen and helium is that

a)

Hydrogen has one more electron than helium

b)

Helium has one more proton than hydrogen

c)

There is no difference between hydrogen and helium

d)

Hydrogen has one more proton than helium

25.

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

a)

H has 1 neutron

b)

H has 1 proton

c)

H has 1 proton and 1 neutron

d)

H has a mass number of 1

26.

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)

a)

drawing conclusions

b)

repeated trials

c)

scientific critique

d)

making inferences

27.

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?

a)

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

b)

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

c)

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

d)

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

28.

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

a)

family or group

b)

period

c)

element

d)

isotope

29.

Potassium, magnesium, an aluminum are all ______.

a)

nonmetals

b)

noble gases

c)

metals

d)

halogens

30.

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

a)

theory

b)

inference

c)

hypothesis

d)

scientific law

31.

Which of the following are examples of vaporization?

a)

in subfreezing air, water vapor turns directly into ice

b)

the water in the mud puddle evaporated

c)

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

d)

the dry ice formed steam

32.

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

a)

80

b)

200

c)

120

d)

50

33.

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)

a)

Group 1

b)

Group 2

c)

Group 3

d)

Group 4

34.

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

a)

deposition

b)

evaporation

c)

condensation

d)

sublimation

35.

Using the diagram above, H is the __________ for hydrogen

a)

atomic number

b)

atomic mass

c)

atomic symbol

d)

number of protons