Science Quiz

The electrons of an atom

• are found in the nucleus along with the protons.

• occupy the space surrounding the nucleus.

• have a positive charge.

Tags

NGSS.MS-PS1-1

All matter is composed of

• Cells

• Oxygen

• atoms

Tags

NGSS.MS-PS1-1

Phosphorous has an atomic number of 15 and an atomic mass of 31. Which of the following is true?

• Phosphorous has 15 neutrons.

• Phosphorous has 15 protons.

• Phosphorous has 31 neutrons.

Tags

NGSS.MS-PS1-1

Which of the following is not a macromolecule?

• ice

• carbohydrate

• lipid

Atoms of the same element that have a different number of neutrons are called

• molecules.

• lipids.

• isotopes.

The 2 types of nucleic acids are

• Catalase and lactase

• DNA and RNA

• Lipids and sugars

Tags

NGSS.MS-LS3-1

When an electron is transferred from one atom to another, this forms a(n)

• Ionic bond

• Hydrogen bond

• Covalent bond

Which of the following bonds is the weakest?

• covalent

• ionic

• hydrogen

The oxygen side of a water molecule is slightly attracted to the hydrogen side of another water molecule. This is caused by water’s _______________ and causes water to _______________.

• Capillary action; divide into hydrogen and hydroxide ions

• Acidity; creep up thin tubes

• Polarity; form hydrogen bonds

The reason small polar molecules can easily disperse into your blood stream and travel to other parts of your body is because

• water can creep up thin tubes.

• water has high surface tension.

• water is a universal solvent.