Quiz about 8th Science STAAR Review

Question 1

Accepted Answer

the proposed law will not protect the lake because groundwater will carry pollution from the weland directly into the lake

Answer

the proposed law will protect the lake because plant roots between the wetland and the lake will stop pollution from entering th elake

Answer

the proposed law ill not protect the lake because animals that live in or near the lake will add pollution to the lake

Answer

the proposed law will protect the lake because the high elevation of the water table will block pollution from entering the lake

Question 2

A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?

Accepted Answer

Lepidoptera

Answer

Coleoptera

Answer

Heteroptera

Answer

Diptera

Question 3

(8.6A 2019-Q36)

Accepted Answer

F

Answer

G

Answer

H

Answer

J

Question 4

(8.5D 2019-Q17)

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 5

Based on the key, which type of tree is the sample from?

Accepted Answer

Horse chestnut

Answer

Ginko

Answer

Sweet gum

Answer

Honey locust

Question 6

Question 6.

Accepted Answer

Particle Z

Answer

Particle W

Answer

Particle X

Answer

Particle Y

Question 7

Suppose you pull Nick, who is standing on a skateboard, using a rope at a constant acceleration. What happens when you double the mass and add a friend?

Accepted Answer

The amount of force required is doubled.

Answer

There will be no change to the required amount of force.

Answer

The amount of force required is slightly increased.

Answer

The amount of force required is four-times as great.

Question 8

(8.7B 2018-Q30)

Accepted Answer

J

Answer

F

Answer

G

Answer

H

Question 9

A tiger cub has a pattern of stripes on its fur that is similar to that of its parents. Where are the instructions stored that provide information for a tiger's fur pattern?

Accepted Answer

on genes within chromosomes

Answer

in cytoplasm inside cells

Answer

on the cell membrane

Answer

in the mitochondria

Question 10

Once in orbit, the space shuttle used very little, if any, rocket power to maintain its speed despite traveling over 15,000 mph! How were NASA engineers able to do this?

Accepted Answer

More force at liftoff equals more acceleration

Answer

More mass equals more acceleration

Answer

The space shuttle was able to use a special coating in order to achieve its fast speed in space.

Answer

Gravity provides the necessary force to keep the space shuttle traveling at a high rate of speed.

Question 11

Where do ocean currents heat up?

Accepted Answer

Equator

Answer

Poles

Answer

Underwater

Answer

Near land

Question 12

Atoms of which two elements have a combined total of 23 protons?

Accepted Answer

Sodium, Na, and magnesium, Mg

Answer

Boron, B, and carbon, C

Answer

Copper, Cu, and zinc, Zn

Answer

None of these

Question 13

How do white dwarfs compare to blue giants?

Accepted Answer

Same temperature, white dwarfs are dimmer

Answer

Blue giants are hotter, same luminosity

Answer

Same temperature, blue giants are dimmer

Answer

Blue giants are hotter and brighter

Question 14

What is one way humans are trying to positively impact the ocean?

Accepted Answer

Creating artificial reefs

Answer

Fishing

Answer

Harvesting oil and natural gas

Answer

Transporting goods in ocean vessels

Question 15

Does this chemical equation follow the Law of Conservation of Mass?

Accepted Answer

No

Answer

Yes

Answer

I don't know

Answer

Maybe

Question 16

What is happening at A?

Accepted Answer

Stationary

Answer

Accelerating

Answer

Slower steady speed; moving away from the starting position

Answer

Steady speed; returning to start position

Question 17

(8.7B 2019-Q27)

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 18

Based on the alignment of the Earth, Sun, & Moon, which tide occurs?

Accepted Answer

Spring Tide

Answer

Tidal waves

Answer

Neap Tide

Answer

No Tide

Question 19

Some students take care of a vegetable garden. When it is time to plant in the spring, the students leave part of the garden empty in order to observe ecological succession. Which of these will most likely occur first?

Accepted Answer

Growth of weeds and grasses

Answer

Development of the topsoil

Answer

Growth of trees and shrubs

Answer

Development of a stream

Question 20

What is the mass number of this element?

Accepted Answer

59

Answer

5

Answer

27

Answer

32

Question 21

Where are the genes for the physical traits of an organism located?

Accepted Answer

on a chromosome

Answer

on a strand of RNA

Answer

inside a hormone

Answer

inside a carbohydrate

Question 22

Standing in line is an example of a ________ ________ since you are not moving forward, backward, or sideways.

Accepted Answer

balanced force

Answer

negative acceleration

Answer

unbalanced force

Answer

1st law of motion

Question 23

How many producers are present in the food web?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 24

Students in a science class prepared flash cards so that they could quiz one another about the arrangement of the periodic table. One of the flash cards contained information about two elements, Element L and Element M.

The students had to use the information on the flash card to determine possible positions of the two elements on a blank periodic table. Which periodic table has the elements placed in locations that match the information on the flash card?

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Question 25

Which element does this model represent?

Accepted Answer

Carbon

Answer

Nitrogen

Answer

Hydrogen

Answer

Boron

Question 26

Some students measure the acceleration of a wheeled cart being acted on by varying forces. The students record their data in the table shown below. According to the data table, how much force is acting on the cart when the students measure an acceleration of 2.6 m/s?

Accepted Answer

13 N

Answer

7 N

Answer

8 N

Answer

12 N

Question 27

What is found in the nucleus of atoms?

Accepted Answer

Protons and neutrons.

Answer

Protons and electrons.

Answer

Protons, neutrons, and electrons.

Answer

Neutrons and electrons.

Question 28

(8.7B 2017-Q8)

Accepted Answer

G

Answer

F

Answer

H

Answer

J

Question 29

Which type of force(s) will cause a change in an object's motion?

Accepted Answer

unbalanced force

Answer

gravity

Answer

balanced forces

Answer

net force

Question 30

Which model best represents the data?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 31

Which box has a higher density?

Accepted Answer

Box A

Answer

Box B

Answer

cannot be determined

Answer

they are the same

Question 32

(8.C -Q30)

Which pair of properties describes the elements in Group 18?

Accepted Answer

J They are gaseous and room temperature and chemically stable.

Answer

F They are chemically stable and liquid at room temperature.

Answer

G They have eight balence electrons and are flammable.

Answer

H They are maganetic and boil at low temeperatures.

Question 33

Determine the contour interval

Accepted Answer

20 m

Answer

10 m

Answer

50 m

Answer

100 m

Question 34

The topographic map shows the location of a park ranger at Point X when a message is received that an injured hiker needs help at Point Z. Which of these is closest to the difference in elevation between the locations of the ranger and the injured hiker?

Accepted Answer

450 m

Answer

2,050 m

Answer

910 m

Answer

3,650 m

Question 35

What causes Earth's seasons?

Accepted Answer

the tilt of Earth's axis

Answer

Earth's rotation

Answer

the revolution of the Moon

Answer

Earth's distance from the Sun

Question 36

Which statement best describes evidence that a chemical reaction occurs as a cake bakes?

Accepted Answer

the cake rises as gas bubbles form in the baking cake

Answer

the water in the cake batter evaporates

Answer

the cake takes the shape of the container in which it is baked

Answer

the water in the cake batter is used to keep the cake moist as it bakes

Question 37

Students were asked to identify the location of elements in the periodic table based on clues printed on game cards. Based on the data, which periodic table shows the correct location of the four elements?

*the answer choices (F, G, H & J) are the same in the question image and the answer choice images...trying to make it so you can zoom in to see the answers!

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 38

A large rock is motionless on a flat sidewalk. Which statement best explains why the rock remains motionless?

Accepted Answer

the forces acting on the rock are all balanced

Answer

there are no forces acting on the rock

Answer

the only force acting on the rock is directed toward the sidewalk

Answer

the sidewalk exerts an unbalanced force on the rock

Question 39

Newton's third law states that any action will have a(n) _______ and ______ reaction

Accepted Answer

equal and opposite

Answer

equal and same

Answer

equal and equal to

Question 40

A ball at the top of a hill has ________ ________ because if pushed it will roll down the hill.

Accepted Answer

Potential Energy

Answer

Mechanical Force

Answer

Unbalanced Energy

Answer

Unbalanced Force

Question 41

Hay is made up of organic compounds.

What are the main elements in many organic compounds?

Accepted Answer

Carbon, hydrogen, oxygen

Answer

Helium, carbon, sodium

Answer

Sodium, hydrogen, nitrogen

Answer

Radon, oxygen, helium

Question 42

Pushing  a child on a swing is easier than pushing an adult on the same swing.

Accepted Answer

2nd Law

Answer

1st Law

Question 43

When a student runs and kicks a ball, they have applied an ___________ force to move the ball.

Accepted Answer

Unbalanced

Answer

Balanced

Answer

Magnetic

Answer

Spring

Question 44

(8.7B 2017-Q31)

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 45

What causes heat to transfer based on density?

Accepted Answer

Convection

Answer

Conduction

Answer

Radiation

Question 46

What energy transformations are occurring in this scenario?

Accepted Answer

solar energy --> electrical energy --> light energy

Answer

electrical energy --> mechanical energy --> light energy

Answer

solar energy --> mechanical energy --> light energy

Answer

solar energy --> electrical energy --> mechanical energy

Question 47

(8.7B 2019-Q24)

Accepted Answer

J

Answer

F

Answer

G

Answer

H

Question 48

What is the most likely elevation of the mountain peak? (Contour interval is 100 m)

Accepted Answer

1652 meters

Answer

1550  meters

Answer

1500 meters

Answer

1700 meters

Question 49

Which day would you expect to see a Full Moon?

Accepted Answer

Saturday

Answer

Sunday

Answer

Wednesday

Question 50

Element R and Element Q have the same number of valence electrons. These elements both have similar chemical behavior, but Element R has fewer energy levels than Element Q. Which statement best describes the positions of the two elements in the periodic table?

Accepted Answer

the two elements are in the same group, with element R just above element Q

Answer

the two elements are in the same period, with element R the first element in the period and element Q the last element

Answer

the two elements are side by side in the same period, with element Q to the left or element R

Answer

the two elements are in the same group, with element Q at the top of the group and element R at the bottom

Question 51

Which is newtons 3rd law

Accepted Answer

For every reaction there is an equal and opposite reaction

Answer

for every thing there is reaction

Answer

for every reaction there is a unusual action

Answer

for every reaction there is an good action

Question 52

The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed in the image.

Which of these elements is in this group:

Accepted Answer

Strontium

Answer

Lithium

Answer

Aluminum

Answer

Silicon

Question 53

(8.5D 2017Q-13)

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 54

Which position shows the Northern hemisphere experiencing winter?

Accepted Answer

Postion 3

Answer

Position 1

Answer

Position 2

Answer

Postion 4

Question 55

Question 55.

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 56

An atom of which element is represented by the model below?

Accepted Answer

Boron

Answer

Carbon

Answer

Lithium

Answer

Oxygen

Question 57

How many days are in between phases 1 and 3.

Accepted Answer

7

Answer

1

Answer

14

Answer

21

Question 58

Which topographic map best represents this landform?

Accepted Answer

Option A is correct

Answer

B.

Question 59

The atomic number of krypton is 36. If the mass number of a krypton atom is 84, which table shows the number of subatomic particles inside and outside the nucleus of the krypton atom?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 60

Four students were asked to complete a table for a science assignment. Each student selected one chemical element from each of four groups in the periodic table and then classified each element as a metal, nonmetal or metalloid. Which table was completed correctly?

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 61

(8.7B 2018-Q19)

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 62

What are the main functions of the human skeletal system?

Accepted Answer

to support the body, protect the organs, produce blood cells, and store calcium

Answer

to regulate the composition of bodily fluids by removing metabolic wastes and retaining a balance of water, salt, and other nutrients

Answer

to regulate and maintain bodily functions by producing hormones and releasing them into the bloodstream

Answer

to enable the diffusion of oxygen into the bloodstream and the removal of carbon dioxide from the bloodstream

Question 63

Question 63.

Accepted Answer

both move backward, but the daughter moves with a greater acceleration

Answer

the mother moves forward, and the daughter moves backward with a greater acceleration

Answer

both move forward, but the mother moves with greater acceleration

Answer

the mother moves backward, and the daughter moves forward with a greater acceleration

Question 64

A scientist spilled a few drops of dilute hydrochloric acid (HCl) on a lab table. For safety purposes, the scientist sprinkled some baking soda (NaHCO3) onto the spill. Which observation would provide the best evidence that a chemical reaction occurred?

Accepted Answer

The baking soda and hydrochloric acid combined, and bubbles formed.

Answer

The baking soda absorbed the hydrochloric acid.

Answer

Some of the baking soda dissolved in the hydrochloric acid.

Answer

The hydrochloric acid evaporated, leaving only the baking soda.

8th Science STAAR Review

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