physci BM#3 Student Name:

_______________________

_________ Score: _________ Date:

Teacher Name: 6elly Horan 1)

Which two elements from the table are MOST likely to form a compound? A)

Mg and S

C)

Mg and Ar

B)

Na and Ar

D)

Na and Mg

2) A balanced chemical reaction obeys the law of A)

ideal gases.

C)

conservation of matter.

B)

definite proportions.

D)

conservation of energy.

3) Newton's second law states that F = m x a (Force is mass times acceleration). Which example would have the GREATEST acceleration? A)

a 10 kg ball thrown with a 50 Newton force

C)

a 50 kg student launched by a 100 Newton catapult

B)

a 1 kg ball thrown with a 0.5 Newton force

D)

a 500 kg car accelerated by 1000 Newtons from the engine

4) The acceleration of an object would increase if there was an increase in the A)

mass of the object.

C)

inertia of the object.

B)

force on the object.

D)

friction on the object.

5)

According to the scale, which of these substances is the strongest acid? A)

NaOH

C)

bleach

B)

blood

D)

lemon juice

6) ___________ are bonds in which valence electrons are shared. A)

Ionic bonds

C)

Covalent bonds

B)

Atomic bonds

D)

Hydrogen bonds

7) Lithium is a metal with an oxidation number of 1+ and oxygen is a nonmetal with an oxidation number of 2-. Which chemical formula represents the compound formed by these two elements? A)

Li2O

C)

LiO

B)

Li3O

D)

LiO2

8) As an astronaut goes out into space, her mass _______________ and her weight ____________________. A)

increases, decreases

C)

stays the same, increases

B)

decreases, increases

D)

stays the same, decreases

9)

What is the identity of the atom shown? A)

argon

C)

chlorine

B)

bromine

D)

nitrogen

10) Which is an example of a solution? A)

air

C)

salt

B)

oxygen

D)

water

11)

Which particle has the most energy? A)

ice

C)

steam

B)

water

D)

there is no difference in particle energy

12) A horse began running due east and covered 25 km in 4.0 hr. What is the average velocity of the horse? A)

0.16 km/hr due east

C)

16 km/hr due east

B)

6.25 km/hr due east

D)

100 km/hr due east

13)

Thorium-229 Years Amount 0

16

7340

8

14680

4

22020

2

29360

1

36700

0.5

Thorium-229 is a highly radioactive isotope used in the treatment of certain cancers. Use the chart to determine how much thorium would remain after 7,340 years if a sample began at 20 pounds of pure Th-229.

14)

A)

0.5 pounds

C)

8 grams

B)

5 pounds

D)

10 pounds

Predict the energy trend as a substance changes from a solid to liquid to gas on this graph. A)

It would increase from bottom left to top right.

C)

It would be a horizontal line as energy would remain constant.

B)

It would decrease from top left to bottom right.

D)

It would increase from solid to liquid, then decrease from liquid to gas.

15)

Which could complete the liquid phase description in the venn diagram? A)

Definite shape and low energy particles

C)

No definite shape and high energy particles

B)

No definite shape and no definite volume

D)

No definite shape and medium energy particles

16)

Beryllium has a nucleus composed of protons and neutrons. Given the data, how many protons are in a typical Beryllium nucleus? A)

3

C)

5

B)

4

D)

9

17) A basketball rolls to a stop along a gym floor without anyone touching it. What answer choice BEST explains why this occurred? A)

The initial force that started the ball ran out.

C)

The natural state of the ball is not to be in motion.

B)

The opposing force of friction stopped the ball.

D)

The force of gravity slowed the ball until it stopped.

18) Why does a skydiver accelerate as she falls to the earth before opening her chute? A)

because she loses mass during her travel

C)

because the force of the earth pulls on her

B)

because she gets further from the airplane

D)

because fewer forces are present to slow her down as she drops

19) Bleach Detergent Ammonia What property do all three of these common household substances have in common?

20)

A)

They are all acidic.

C)

They all have a pH above 7.

B)

They all taste sour.

D)

They all turn litmus paper red.

The graph represents the distance a car travels over time while on the highway. Which statement about the car's trip is accurate? A)

The car does not move over time.

C)

The car's velocity increases constantly over time.

B)

The car travels at a constant velocity.

D)

The car's velocity decreases constantly over time.

21) What is one way that fission and fusion are similar? A)

Both processes begin with uranium.

C)

Both processes break nuclei into smaller particles.

B)

Both processes produce energy from mass.

D)

Both processes are used to produce commercial electricity.

22) Carbon and flourine combine covalently to form a binary compound. What is the formula of the compound with the name carbon tetrafluoride? A)

C4F

C)

CF

B)

C4F4

D)

CF4

23)

The compound formed has a(n) ___________ bond and is a(n) _________________. A)

ionic; crystalline solid

C)

metallic; crystalline solid

B)

covalent; amorphous solid

D)

covalent; crystalline solid

24) Which of the these is a balanced chemical equation? A)

CO(g) + O2(g) → CO2(g)

C)

2CO(g) + O2(g) → 2CO2(g)

B)

CO(g) + 2O2(g) → 2CO2(g)

D)

2CO(g) + 2O2(g) → 2CO2(g)

25) CO2 NaCl HCl These may all be classified as A)

elements and compounds.

C)

elements and pure substances.

B)

elements and molecules.

D)

compounds and pure substances.

26) Rusting metal is an example of a _________ change. A)

phase

C)

chemical

B)

state

D)

physical

27) Helium, neon, and argon are examples of A)

metals.

C)

noble gases.

B)

metalloids.

D)

transitional metals.

28)

In the classification of matter chart, letter A. would be a(n)

29)

A)

acid.

C)

element.

B)

compound.

D)

solution.

What can we say about the rock as it falls to Earth? A)

It accelerates as it falls.

C)

It is at a constant velocity as it falls.

B)

It falls at a constant rate of speed.

D)

It accelerates until it reaches a peak velocity, then decelerates.

30) What would be an ideal experiment to test how different types of surfaces affect friction?

31)

A)

Two objects of equal weight placed on two glass surfaces of equal lengths.

C)

Two objects of equal weights placed on a glass surface and a wooden surface.

B)

Two objects of equal weight placed on two glass surfaces of unequal lengths.

D)

Two objects of different weights placed on two wooden surfaces of unequal lengths.

Doctors use the radioactive isotope chromium-51 to label red blood cells in the human body. Chromium-51 gives off relatively ______ alpha particles that can be stopped by _______ . A)

energetic; lead

C)

weak; a thin sheet of copper.

B)

weak; a sheet of paper.

D)

energetic; a thick sheet of copper.

32)

Mass (kg) Force (N) 5

25

10

50

15

75

20

100

A student was trying to find the relationship between mass and force. He placed four different masses on a table and pulled them using a spring scale. The table shows the different masses used in the experiment and the force required to pull each mass. The student concluded that more force was required to pull heavier objects. What comment would you make regarding his conclusion? A)

No clear relation can be observed between mass and force from the data.

C)

Gravity should have been taken into account while performing the experiment.

B)

There is a direct proportion between the mass and force listed in the table.

D)

There is an inverse proportion between the mass and force listed in the table.

33) 2 KCl(s) → 2 K(s) + Cl2(g) When potassium chloride breaks down, potassium metal and chlorine gas are formed. What type of reaction is this? A)

synthesis

C)

single replacement

B)

decomposition

D)

double replacement

34) AgNO3 (aq) + KCl(aq) ‑‑‑‑> AgCl(s) + KNO3(aq) When silver nitrate reacts with potassium chloride, silver chloride and potassium nitrate are formed. What type of reaction is this? A)

synthesis

C)

single replacement

B)

decomposition

D)

double replacement

35)

What does the diagram represent? A)

A neutral oxygen atom

C)

An oxygen ion with a +2 charge

B)

An oxygen atom with 7 protons

D)

An oxygen ion with a -2 charge