Iowa Tests Science Practice

In the modern Periodic Table, elements are arranged

• according to atomic mass.

• according to atomic number.

• in alphabetical order.

• according to the number of neutrons in their nuclei.

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

The atoms we study in 6th grade are neutral, which means they have the same number of

• protons and electrons

• protons and neutrons

• electrons and neutrons

What does 12.011 represent?

• atomic mass

• atomic number

• element name

• chemical symbol 

Tags

NGSS.MS-PS1-1

Which of the following is a chemical change?

• Dissolving salt in water

• Boiling water

• Burning wood

• Melting ice

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the primary function of the chloroplasts in plant cells?

• To break down sugar molecules to release energy

• To store water and nutrients

• To capture light energy and convert it into chemical energy

• To control the entry and exit of substances in and out of the cell

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-2

What is the process by which plants release water vapor into the air through their leaves?

• Condensation

• Transpiration

• Evaporation

• Precipitation

Tags

NGSS.MS-ESS2-4

What does the 6 represent?

• atomic mass

• atomic number

• element name

• chemical symbol 

What does the C represent?

• atomic mass

• atomic number

• element name

• chemical symbol 

Tags

NGSS.MS-PS1-1

The solubility of a solution can be increased by

• Adding more water to it

• By freezing the solution

• By heating the solution

• By adding alum to it

Tags

NGSS.MS-PS1-4