SCIENCE 7 MATTER, ATOM, SCIENTIFIC MODEL

1. Which of the following is NOT a state of matter?

• solid

• liquid

• gas

• energy

What is the smallest unit of an element that retains its chemical properties?

• atom

• compound

• molecule

• ion

Which of the following best describes a molecule?

• A single atom of an element

• A group of atoms bonded together

• A mixture of substances

• A state of matter

Which of these changes represents a phase change from liquid to gas?

• melting

• freezing

• condensation

• evaporation

Which phase of matter has no definite shape and no definite volume?

• solid

• liquid

• gas

• plasma

Who proposed the "plum pudding" model of the atom?

• john dalton

• j.j thompson

• niels bohr

• ernest rutherford

Which scientist discovered the nucleus through the gold foil experiment?

• A. Niels Bohr
  

• B. J.J. Thomson

• C. Ernest Rutherford

• D. Democritus

Which model suggested that electrons move in specific orbits around the nucleus?

• A. Rutherford Model
  

• B. Bohr Model

• C. Quantum Model

• D. Dalton’s Atomic Theory

Which of the following statements about solids is TRUE?

• A. Particles in a solid move freely and quickly
  

• B. Solids have a definite shape and volume

• C. Solids do not have mass

• D. Solids take the shape of their container

Which scientist first proposed the idea that matter is made up of indivisible particles called “atomos”?

• A. Aristotle
  

• B. Dalton

• C. Democritus

• D. Bohr