Eighth grade science quiz #1

Which is the best example of a pure substance?

• peanuts

• milk

• gold

• air

Which statement best explains how periods on the periodic table are organized?

• increasing atomic number from left to right

• increasing number of neutrons from left to right

• decreasing number of electrons from left to right

• decreasing atomic mass number from left to right

An ice cube is put into a heated pan. What will most likely happen to the molecules in the ice as the ice is heated?

• The molecules will begin to move slower

• The molecules will begin to move faster

• The molecules will begin to increase in density

• The molecules will begin to condense in the air

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which pair of elements has the most similar properties?

• Li and B

• I and Ca

• K and He

• N and P

Where do plants get most of the energy they need to live and grow?

• water

• soil

• air

• sunlight

Tags

NGSS.MS-LS1-6

Under normal conditions, the element that has a total of 11 electrons is _______.

• potassium

• sodium

• chlorine

• oxygen

The subatomic particles that can be found in the nucleus of an atom are:

• protons and electrons

• electrons and neutrons

• neutrons and protons

• cations and anions

The subatomic particle that has a negative charge is:

• cation

• electron

• neutron

• proton

The subatomic particle that has a positive charge is:

• anion

• neutron

• proton

• electron

A/an atom or molecule that has gained or lost an electron is called:

• ion

• proton

• neutron

• quark