Which of the following occurs in the presence of oxygen gas?

A glowing splint will reignite.

When it comes into contact with a lit splint, a loud ‘pop’ is heard.

When it comes into contact with a lit splint, the flame is extinguished.

Which of the following occurs in the presence of carbon dioxide gas?

When it comes into contact with a lit splint, a loud ‘pop’ is heard.

A glowing splint will reignite.

When it comes into contact with a lit splint, the flame is extinguished.

Which of the following occurs in the presence of hydrogen gas?

When it comes into contact with a lit splint, a loud ‘pop’ is heard.

A glowing splint will reignite.

When it comes into contact with a lit splint, the flame is extinguished.

What is the main function of the human digestive system?

To break down foods for absorption into the blood.

To exchange oxygen and carbon dioxide in the lungs.

To release energy from sugars within the cells.

To carry nutrients to all parts of the body.

The diagram at the right shows a human body system. What are two of the functions performed by this body system?

Protects and supports the body.

Produces and transports oxygen within the body.

Produces and excretes waste products.

Controls and coordinates body activities.

Movement of the skeleton is possible because:

cartilage separates muscle and bones.

all muscles are controlled by voluntary movement.

The arm can be lifted in the direction shown because:

the biceps contract to pull the radius while the triceps relax.

the biceps contract to pull the radius while the triceps relax to push ulna.

the biceps relax to pull the radius while the triceps contract to push ulna.

the biceps relax to push the radius while the triceps contract.

In an investigation to determine the change in heart rate with increased activity, a teacher asked students to take their pulses immediately before and immediately after exercising for 2 minutes. The data showed an average heart rate of 72 beats per minute before exercising and 90 beats per minute after exercising. If a valid conclusion is to be made from the results of this investigation, which assumption must be made?

Each student exercised with the same intensity.

In most students, the average heart rate is not affected by exercise.

Exercise causes the heart rate to slow down.

The heart rate of each student goes up 18 beats after jogging for 2 minutes.

The diagram below shows a human heart. When contracted, the left ventricle pumps oxygenated blood to the body. What is the purpose of the aortic valve that separates the left ventricle from the aorta?

To prevent blood from flowing back into the left ventricle.

To prevent blood from flowing into the aorta.

To push blood into the left ventricle.

An example of a balanced force is:

B. a tug-of-war game in which no one wins.

C. a car hitting a telephone pole.

D. a roller coaster going down the first drop.

An example of an unbalanced force (net force) is:

D. a roller coaster going down the first drop.

B. a tug-of-war game in which no one wins.

What is the definition of weight?

A. Gravitational force on a mass.

C. The amount of matter in an object.

D. The amount of space an object takes up.

Which of the following lists only contact forces?

A. Friction, tension in a rope, magnetism

B. Tension in a rope, magnetism, buoyancy in water

C. Buoyancy in water, upthrust of a rocket, tension in a rope

D. Magnetism, static electricity, gravity

Which of the following lists only non-contact forces?

D. Magnetism, static electricity, gravity

A. Friction, tension in a rope, magnetism

B. Tension in a rope, magnetism, buoyancy in water

C. Buoyancy in water, upthrust of a rocket, tension in a rope

Two identical arrows, A and B, are fired with different bows. The bow that fires arrow A exerts twice the average force as the bow that fires arrow B. Compare the accelerations of the two arrows.

B. Arrow A will have twice the acceleration of arrow B.

A. Arrow B will have twice the acceleration of arrow A.

C. Arrow A and arrow B will have the same acceleration.

D. Arrow B will have four times the acceleration of arrow A.

Year 8 MC Quiz Sem 2

Quiz

•

Science

•

8th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS1-2, MS-LS2-3, MS-PS2-2

+19

Standards-aligned

Belinda Dalby

Used 68+ times

FREE Resource

71 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Choose the example of a physical change.

Melting

Boiling

Freezing

All of the above

Tags

NGSS.MS-PS1-4

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

As a candle burns, the chemical change is:

the light from the flame.

the wax melting.

the burning of the wax.

the heat being produced.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

As two clear solutions sodium sulfate and barium nitrate are combined, a cloudy white powder forms. Choose the best evidence of a chemical change.

A new solid substance being formed

Heat given off

An energy change

Gas being produced

Tags

NGSS.MS-PS1-2

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Here is a word equation for a reaction: magnesium + hydrochloric acid → hydrogen + magnesium chloride. Choose the sentence which best matches the word equation.

Magnesium reacts with hydrochloric acid to form hydrogen and magnesium chloride.

Hydrogen reacts with magnesium chloride to form magnesium and hydrochloric acid.

Magnesium reacts with hydrogen to form hydrochloric acid and magnesium chloride.

Hydrochloric acid and hydrogen react to form magnesium and magnesium chloride.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When effervescence (fizzing) occurs during a chemical reaction it means that:

the reactants are heating up.

a gas is being produced.

energy is being absorbed by the reactants.

a salt is being produced.

Tags

NGSS.MS-PS1-2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A molecule is always made up of:

Two or more atoms.

One kind of element.

Two or more elements.

One atom only.

Tags

NGSS.MS-PS1-1

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which scientist conducted the famous “Gold Foil Experiment”?

Dalton

Thomson

Rutherford

Bohr

Tags

NGSS.HS-PS1-8

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Year 8 MC Quiz Sem 2

71 questions

Choose the example of a physical change.

As a candle burns, the chemical change is:

As two clear solutions sodium sulfate and barium nitrate are combined, a cloudy white powder forms. Choose the best evidence of a chemical change.

Here is a word equation for a reaction: magnesium + hydrochloric acid → hydrogen + magnesium chloride. Choose the sentence which best matches the word equation.

When effervescence (fizzing) occurs during a chemical reaction it means that:

A molecule is always made up of:

Which scientist conducted the famous “Gold Foil Experiment”?

Which scientist devised the “Plum Pudding Model” for the atom?

What is the name of the type of reaction where one substance is broken down into two or more substances?

What is the name of the type of reaction where a substance burns in the presence of oxygen?

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