Physical Science Semester 1 Exam

29 Questions | By Morgancastor | Updated: Mar 21, 2022 | Attempts: 270

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Freshman year can be a tough time for any young individual, both from a personal and an academic perspective. We’re here to help make things a little easier with a quiz on all you need to know about physics.

Questions and Answers

1.

What is scientific law?
- A.
  
  An explanation of an event or events that are supported by evidence that has been collected over time
- B.
  
  Rules that scientists must follow when conducting experiments to ensure that processes are safe and results are reliable
- C.
  
  A process of learning that begins with a hypothesis and proceeds to prove or change the hypothesis by comparing with scientific evidence
- D.
  
  A set of principles that explain and predict scientific discoveries
2.

What is a scientific theory?
- A.
  
  A scientific explanation supported by evidence collected over time
- B.
  
  A scientific idea that is developed prior to conducting an experiment
- C.
  
  The first step in developing a scientific law
- D.
  
  An educated guess
3.

What is the difference between a scientific law and a scientific theory?
- A.
  
  A scientific law is set in stone. A scientific theory is just an idea.
- B.
  
  A scientific theory must be supported by alot of evidence. A scientific law does not.
- C.
  
  A scientific law is a description of an observed phenomenon. A scientific theory is an explanation of an observed phenomenon.
- D.
  
  None of the above.
4.

Matter that contains a combination of different elements and/or compounds and can be separated by physical means.
- A.
  
  Substance
- B.
  
  Mixture
- C.
  
  Bond
- D.
  
  Polymer
5.

A pure substance that cannot be broken down into simpler substances by physical or chemical means.
- A.
  
  Element
- B.
  
  Mixture
- C.
  
  Polymer
- D.
  
  None of the above
6.

A pure substance is
- A.
  
  Matter that contains a combination of elements and/or compounds
- B.
  
  Matter that cannot be broken down into simpler substances by physical or chemical means
- C.
  
  An element or compound that consists of only one component with definite physical and chemical properties and a definite composition
- D.
  
  B and c
7.

Deposition is _____________________________________________________________________________.
8.

An ionic bond transfers an electron from one atom to another resulting in ____________________________________.
9.

A covalent bond iss formed by atoms that are ________________________________.
10.

Organic chemistry is a branch of chemistry that specializes in the study of carbon compounds.
- A.
  
  True
- B.
  
  False
11.

Organic compounds are
- A.
  
  Carbon-based
- B.
  
  Also known as organic molecules
- C.
  
  Found in every living thing
- D.
  
  All of the above
12.

A carbohydrate is
- A.
  
  Bad for you
- B.
  
  A group of energy-rich compounds
- C.
  
  A chain of amino acids
13.

A protein is a complex natural substance that has a globular or fibrous structure composed of linked amino acids. Proteins are essential to the structure and function of all living cells and viruses.
- A.
  
  A group of very large molecules made of carbon, nitrogen, hydrogen, and oxygen, and sometimes sulfur
- B.
  
  A long chain of amino acids linked together
- C.
  
  A complex natural substance found in most body tissue
- D.
  
  All of the above
14.

A polymer is
- A.
  
  A tiny molecule
- B.
  
  A solid substance containing protein
- C.
  
  A single molecule found in most compounds
- D.
  
  A compound that is composed of long chains of smaller molecules
15.

The ability of an object to change or cause change.
- A.
  
  Movement
- B.
  
  Energy
- C.
  
  Force
- D.
  
  Kinetic
16.

_________________ energy is due to temperature.
17.

Molecules that change from a liquid to a gas at temperatures below the boiling point.
- A.
  
  Evaporation
- B.
  
  Condensation
- C.
  
  Sublimation
- D.
  
  Precipitation
18.

Molecules that change from a solid directly to a gas with no liquid phase when heat energy is added.
- A.
  
  Evaporation
- B.
  
  Condensation
- C.
  
  Sublimation
- D.
  
  Precipitation
19.

Amino acids are
- A.
  
  A group of smaller molecules
- B.
  
  The building blocks of proteins
- C.
  
  Made up of carbohydrates
- D.
  
  Both a and b
20.

What theory states that all phases of matter, atoms, and molecules exhibit random motion?
- A.
  
  Theory of natural motion
- B.
  
  Molecular orbital theory
- C.
  
  Theory of relativity
- D.
  
  Kinetic molecular theory
21.

Gases have a very high density.
- A.
  
  True
- B.
  
  False
22.

Why do gases have low density?
- A.
  
  The molecules in gas are separated from each other
- B.
  
  The molecules in gases are closer together
- C.
  
  Gases are high in temperature
- D.
  
  Gases are low in temperature
23.

What are the properties of gases?
- A.
  
  They are easy to compress and expand to fill containers
- B.
  
  They occupy more space than liquids or solids
- C.
  
  Molecules in gas are far apart
- D.
  
  All of the above
24.

What law states that at a constant temperature, the volume of a confined gas varies inversely with its pressure.
25.

What law states that the volume and temperature of gas are directly proportional, for example the volume of a gas increases with increasing temperature.