Physical Science Hon Sem 2 Exam

What was Dalton's key contribution to atomic theory?

• Discovered protons in the atom.

• Atoms are visible under a microscope.

• Atoms can change form during reactions.

• Proposed atoms are indivisible and represent elements.

What did Aristotle believe about the existence of atoms?

• Matter is continuous and not made of atoms.

• All matter consists of four elements: earth, wind, fire and water.

• Atoms are indivisible and indestructible.

• Atoms can be created and destroyed.

What evidence prompted revisions to atomic theory over time?

• Atoms possess constant sizes and shapes.

• Atoms are indivisible entities at all times.

• Experimental findings indicating diverse atomic structures and behaviors.

• All matter is composed of molecules.

What happens when the motion of particles slows?

• The particles split.

• The particles move further apart.

• The particles move closer together.

• The particles no longer move randomly.

Tags

NGSS.MS-PS1-4

Charlotte and Mason are conducting an experiment with four different flasks. According to the Kinetic Molecular Theory, which flask would have the highest pressure?

• Flask 1

• Flask 2

• Flask 3

• Flask 4

Arjun is filling a balloon with air at 2 atm pressure. He then compresses the balloon until the pressure reaches 1 atm. What is the final volume of the balloon if the initial volume was 4 L? (P1V1 = P2V2)

• 4 L

• 2 L

• 16 L

• 8 L

Olivia is conducting an experiment using a 10-milliliter graduated cylinder on an electronic balance. The pictures below show the balance readings before and after a liquid was added. Given that density equals mass divided by volume (d=m/v), what is the density of the liquid in grams per milliliter (g/mL)?

• 4.4 g/mL

• 7.3 g/mL

• 1.1 g/mL

• There is no way to determine the answer.

Charlotte has a 4cm³ cube of each of these metals, which cube will have the greatest mass?

• Brass

• Gold

• Iron

• Lead

Tags

NGSS.MS-PS1-2

A forensic scientist has been asked to identify a metal that was found at the scene of a crime. Which of these properties would be most helpful in identifying the unknown compound?

• Color

• Volume

• Texture

• Melting Point

Tags

NGSS.MS-PS3-4

Nora and Henry are working on a science project. They need to connect a battery to a light bulb to make it turn on. They have a list of materials and notice that some are good conductors. Based on this information, which objects could they use?

• glass, rubber, iron

• plastic and copper

• iron, aluminum, and copper

• aluminum and rubber