Science Grade 8 Review Pt 1

What is the basic structural and functional unit of all living organisms?

• cell

• molecule

• organ

• tissue

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

In a chemical reaction, what are the substances that react called?

• Products

• Catalysts

• Solvents

• Reactants

What are the three main layers of the Earth?

• mantle, crust, outer core

• crust, mantle, core

• outer core, inner core, crust

• crust, core, mantle

What type of energy is associated with the flow of electric charge?

• Mechanical energy

• Sound energy

• Electrical energy

• Light energy

Tags

NGSS.4-PS3-2

What process do plants use to convert light energy into chemical energy?

• Photolysis

• Chlorophyll

• Respiration

• Photosynthesis

Tags

NGSS.MS-LS1-6

What are Newton's three laws of motion?

• Law of Gravitation: Objects are attracted to each other by a force proportional to the product of their masses.

• 1. Law of Inertia: An object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. 2. Law of Acceleration: The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. 3. Action-Reaction Law: For every action, there is an equal and opposite reaction.

• Law of Thermodynamics: Energy cannot be created or destroyed, only transferred or converted.

• Law of Reflection: The angle of incidence is equal to the angle of reflection.

Tags

NGSS.MS-PS2-1

What is the process by which organisms better adapted to their environment tend to survive and produce more offspring?

• Natural selection

• Mutation

• Artificial selection

• Genetic drift

Tags

NGSS.MS-LS4-4

What are the three main components of the Earth, Moon, and Sun system?

• Earth, Moon, Sun

• Pluto, Uranus, Mars

• Mercury, Neptune, Saturn

• Mars, Venus, Jupiter

Tags

NGSS.MS-ESS1-1

What is the transfer of thermal energy from a warmer object to a cooler object?

• Temperature exchange

• Cold transfer

• Heat transfer

• Chill swap

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What type of energy is produced by the vibrations of electrically charged particles?

• Kinetic energy

• Gravitational energy

• Electromagnetic energy

• Nuclear energy

Tags

NGSS.MS-PS4-1