Biology ch 2 Test Study Guide

Identify the choice that best completes the statement or answers the question. The physical stuff that makes up everything in the universe is known as

• mass.

• elements.

• matter.

• energy.

Tags

NGSS.MS-PS1-5

Which of the following is not a smaller part of an atom?

• nucleus

• ion

• proton

• electron

Tags

NGSS.MS-PS1-1

An ion is

• an atom with more protons than electrons.

• an atom with more electrons than protons.

• either A or B.

• neither A nor B.

A pure substance made of only one kind of atom is a(n)

• element.

• ion.

• neutron.

• chemical.

Temperature is a measurement of

• the amount of matter in an object.

• how much energy an object has.

• the amount of energy stored in chemicals.

• the speed of moving particles.

Tags

NGSS.HS-PS3-2

A compound held together by opposite electrical charges is a(n) __________ compound.

• covalent

• ionic

• molecular

• electrical

Tags

NGSS.HS-PS2-4

NGSS.HS-PS1-3

Which of the following is not a molecule?

• nitrogen (N2)

• magnesium (Mg)

• water (H2O)

• DNA

Tags

NGSS.MS-PS1-1

Covalent compounds form when atoms ________ electrons.

• share

• lose

• gain

• exchange

Tags

NGSS.HS-PS1-1

In an exothermic reaction, the products have ________ than the reactants.

• more energy

• less energy

• the same amount of energy

• none of these

Tags

NGSS.HS-PS1-4

Which of the following is true about enzymes?

• They are catalysts.

• They are large molecules.

• They lower the activation energy of a reaction.

• all of these