Unit 1 EOG review

Which of these BEST describes an atom?

• A particle of matter that carries an overall positive charge.

• A particle of matter that is formed by the bonding of two or more molecules.

• The smallest particle of an element that shows all the properties of that element.

• The smallest particle of an element that can be broken down further to form molecules.

A student performs an investigation to determine the properties of an iron nail. The list shows her findings:

The nail can rust.

The nail is denser than water.

The nail is very hard.

The nail can be bent.

Which statement is correct about the student's findings?

• Rusting is a physical property of iron.

• Hardness is a chemical property of iron.

• Rusting and bending are chemical properties of iron.

• Density and hardness are physical properties of iron.

A rise in the temperature inside a kitchen means that there is an increase in the –

• average size of the air molecules.

• number of the air molecules.

• average velocity of the air molecules.

• density of the molecules.

Tags

NGSS.MS-PS1-4

Which of the following statements describes a difference between a mixture and a pure substance?

• The density of a mixture can change with temperature, but the density of a pure substance cannot change.

• 
  The composition of a mixture can vary from sample to sample, but the composition of a pure substance is always the same.

• A mixture has a specific melting point, while the melting point of a pure substance can vary.

• A mixture tends to be homogeneous, while a pure substance tends to be heterogeneous.

Which of the following do water (H₂O), rust (Fe₂O₃), and salt (NaCl) have in common?

• Water, rust, and salt are elements

• Water, rust, and salt are heterogeneous mixtures

• Water, rust, and salt are homogeneous mixtures

• Water, rust, and salt are compounds

Tags

NGSS.MS-PS1-1

From the list below, identify which situation(s) contain chemical changes.

I) A pot of water is being heated on a stove. Bubbles form and condensation appears on the lid of the pot.

II) A translucent, blue copper (II) sulfate solution is mixed with water and changes to a translucent lighter blue color.

III) Ammonium nitrate solid in added to water and the temperature drops significantly.

IV) Red and blue paint are mixed together and the color purple appears.

• I and II

• III only

• 
  II, III and IV

• I, II and III

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

According to the table, these four models all represent molecules. One model is composed of two atoms of the same element. That is model

• 
• 
• 

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NGSS.MS-PS1-1

A. atom
B. element
C. ion
D. matter
E. molecule

Neon is an inert gas, found in the last column of the periodic table. This is a model depicting the smallest particle of neon. Review the prompt. What statements also describe this model?

• A and B

• A and D

• 
  A, B, and D

• A, B, D and E

Tags

NGSS.MS-PS1-1

Atom A has an atomic number of 19 and mass number of 40. Atom B has an atomic number of 20 and a mass number of 40. Which of these is an accurate statement?

• Atom A has more protons than Atom B.

• Atom A has one less proton and one more neutron than Atom B.

• Atom A has an extra nucleon compared to Atom B.

• Atom A has one more proton and one more electron than Atom B.

Tags

NGSS.MS-PS1-1

Consider this row in the periodic table of elements. As we move from left to right, across the row, the elements

• 
  change from nonmetals to metals.

• change from metals to nonmetals.

• start as gases but end as solids.

• 
  show a decrease in atomic mass number.

Tags

NGSS.MS-PS1-1